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Intel Pentium Overdrive Processor PODP5V83

aldamon said:
I could be wrong, but aren't older systems horrible with power consumption, heat, and PSU efficiency? It wasn't really a priority back in the day so I don't have numbers. I can understand the desire to tinker, but you might be better off tinkering with something more modern and cheap.
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A Pentium II 450 level processor only used about 30-40watts, and Power supplies were typically 200-250watts. At at horrid 65% efficiency, a system could pull 385 watts from the wall in the worst case (if the PSU could have withstood 100% load).

Compared to a similar class machine today (say Core i7, 5870) would draw about 470 watts from the wall (assuming a 400w load and 85% efficiency). So it's pretty much the same.. we just get a shitload more work done today for the power used.

It wasn't until 2003-2005 that power usage got really bad and manufacturer's had to start thinking about how they were building things.
 
I'm saying the manufacturer of the board is PC Chips, or more properly Hsing tech. they used aliases such as Amptron to get around their shoddy reputation. I've run across several posts mention that the manual is only four pages long, and given the age of this board, and the reputation of the manuafacturer, it's believable

P24D is a later revision of the 486DX/2 What I'm saying is to use the setting for the plain old 486DX (aka P4). If you've done this already, and I'm misunderstanding you... I apologize. If that's the case, then it may just be a bad processor, or the board is simply incompatible, despite listing as so. Intel did change the specs for the 486 POD line after many board manufacturers had already produced boards in compliance with the originally publish requirments, which caused a lot of headaches when they finally did release the final product.

As for your mosfet's getting hot.. that's probably because the Pentium Overdrive consumes up to 15w where the 486DX/2-66 only used up to 6w . So you have have nearly 3 times the current going through cheap components. What do you have your voltage, FSB, and multiplier jompers set for? Should be 33MHz, 2x, and 5v.
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I am gonna check with a professional on this to finally see if your correct and I checked the jumper manual again. I have confirmed that there are 5 types of processor mentioned for version 1 and 3 neither one specifically list jumper settings for the P24T, so I am concluding that it must be a drop in replacement as stated. Now if I only I could get the system to post before I try this and so I can see if my new SCSI hard drives for it work.
 
Lots of motherboards with jumpers (486/Pentium/Cyrix/AMD) era have undocumented jumpers. If you have 3 separate jumpers for the FSB, I vaguely remember putting the multiplier on the lowest setting and trying every combination of the FSB jumpers.

If you want other equipment to tinker with, I have a BP6 with dual cele 533's. Had it OC'd to just over 700 each with peltiers and copper homemade water blocks.
 
Lots of motherboards with jumpers (486/Pentium/Cyrix/AMD) era have undocumented jumpers. If you have 3 separate jumpers for the FSB, I vaguely remember putting the multiplier on the lowest setting and trying every combination of the FSB jumpers.

If you want other equipment to tinker with, I have a BP6 with dual cele 533's. Had it OC'd to just over 700 each with peltiers and copper homemade water blocks.
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The only reason to change the FSB settings is to overclock unless otherwise specified. From what the processor is rated at I know the FSB should be set to 33MHz. However, thats a nice set you got there as well. Aren't you limited to only AGP 2X/4X cards because the slot on that board only supports 3.3V and not the 1.5V that AGP 4X uses or the 0.8V that AGP 8X uses? Which means that you must only be able to use a card as new as the ATI Radeon 8500 or Nvidia Geforce 4 series without eventually killing the board. You should post your setup on HardForum and give me the link so I can find it.
 
The OP is just getting ahead of the curve here; in fall 2011 Intel is going to release their Core: Retro edition processors, this being one of them. :)
 
Ok so I got it to post again. aparently I bent the board on the AOpen S3 Virge because I couldn't get it out of the PCI slot when I went to connect the IDE cable for the CD-ROM Drive. I replaced it with a Diamond Stealth 3D with the same S3 Virge graphics chip and I cut myself on the pins from the AOpen S3 Virge. I couldn't install an OS because I don't have any that don't boat from CD-ROM besides Windows 98 and I don't have a Floppy Drive cable.

Here a picture of the POST with the AMD 5x86, 256KB L2 cache, and 256MB of Ram

AMD5x86PostScreen.jpg
 
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Man...256MB in that kind of computer is like having 24GB today!

My first pentium computer had 8mb RAM!
 
If you're got a 5x86 133 in there, why are you trying to bother with the Pentium Overdrive?
 
ryan_975 said:
If you're got a 5x86 133 in there, why are you trying to bother with the Pentium Overdrive?
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The Intel Pentium is better than the AMD K5 5x86, because the Pentium has superscalar architecture with divided L1 cache which means 16KB of instruction and 16KB of data for a total of 32KB while the AMD K5 has 16KB shared L1. My cousin and I did a comparison of the AMD K5 5x86 133MHz system with a Pentium 75MHz system and the performance was no where near the Pentiums which it claims to be.
 
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scharfshutze009 said:
The Intel Pentium is better than the AMD K5 5x86, because the Pentium has superscalar architecture with divided L1 cache which means 16KB of word and 16KB of data for a total of 32KB while the AMD K5 has 16KB shared L1. My cousin and I did a comparison of the AMD K5 5x86 133MHz system with a Pentium 75MHz system and the performance was no where near the Pentiums which it claims to be.
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K5 is not the same as a 5x86. Which one are you talking about? I had a Am5x86-133 for a long time, and while there were some things where my P75 butchered it, for the most part, the renamed 486 did quite well for itself. The K5 5k86 (<- note the 'k') was another story. I never had one myself, but if I remember right, it didn't perform as well as it should have.

Also, the Pentium only has 16KiB L1 cache... the Pentium OD has 32KiB, but it was given that in an attempt to alleviate bandwidth starvation from the 486's 32-bit data bus. It wasn't really effective and the processor couldn't keep up with a true Pentium.
 
LOL However, this is not possible. The mulitplier is 2.5 and the FSB choices are 25MHz, 33MHz, 40MHz, and 50MHz. This means that the only Speeds that are supported are 62.5Mhz @ 25Mhz, 82.5Mhz @ 33Mhz, 100Mhz @ 40MHz, and 125Mhz @ 50MHz.
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Mod this heatsink onto it and overclock it to the max! :D
 
scharfshutze009 said:
LOL However, this is not possible. The mulitplier is 2.5 and the FSB choices are 25MHz, 33MHz, 40MHz, and 50MHz. This means that the only Speeds that are supported are 62.5Mhz @ 25Mhz, 82.5Mhz @ 33Mhz, 100Mhz @ 40MHz, and 125Mhz @ 50MHz.
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Take it to 100! Triple digits FTW! BTW use an H50 watercooler on it. You might think that's cheating, I think it's [H]. LOL.

PS What OS are you running on that beast?
 
That brings back fond memories :) I still have my 486DX4 100mhz complete with motherboard and ram :D I got it in 1995 and replaced with Pentium 133 the following year (with new mobo as well). Not sure if I want to try to start it though lol :D
 
scharfshutze009 said:
First of all I sold my Core i7 975 Extreme and the motherboard. Second my Core 2 Duo doesn't need overclocked everthing runs fine even GTA IV. I also can't say I'm satisfied with the temperature that both Cores are running at. However I will have to do something about the air flow in the front of the case, so I am switching from the Cooler Master 1100W UCP to the Silent Pro. I don't tweak my other computers either I'm just going to finish building them. So far its been fun watching the Amptron DX-9700 count 256MB of RAM which is as far as I've got for now. When I get the hard drive I will configure the SCSI hard drives and install the OS. The Intel PR440FX with Dual Pentium II Overdrive Processors needs alot more. I will install Windows Server 2003 on that then maybe Linux. Then I have A the Super Micro PIIIDR3 serverboard that will have Dual Pentium III 1.0 Ghz and 2GB of RAMBUS ECC at 3.2 GB/s. None of this is really that advanced compared to my Asus Z8PE-D12X server motherboard, but it all in good fun and gives me the chance to experiment with different types of SCSI interfaces.
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You should enable the setting to make the ram count faster. Watching it count MB by MB is unnecessary and overrated.
 
vjcsmoke said:
Take it to 100! Triple digits FTW! BTW use an H50 watercooler on it. You might think that's cheating, I think it's [H]. LOL.

PS What OS are you running on that beast?
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None I'll keep you posted when I get the OS installed right now I'm waiting for my floppy drive cable to arrive that I ordered off ebay, so that I can boot from floppy to install from CD-ROM.
 
ryan_975 said:
K5 is not the same as a 5x86. Which one are you talking about? I had a Am5x86-133 for a long time, and while there were some things where my P75 butchered it, for the most part, the renamed 486 did quite well for itself. The K5 5k86 (<- note the 'k') was another story. I never had one myself, but if I remember right, it didn't perform as well as it should have.

Also, the Pentium only has 16KiB L1 cache... the Pentium OD has 32KiB, but it was given that in an attempt to alleviate bandwidth starvation from the 486's 32-bit data bus. It wasn't really effective and the processor couldn't keep up with a true Pentium.
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If I'm not mistaken the Pentium also introduced the use of two ALU's (Arithmetic Logic Units) which allowed it to perform multitasking.
 
scharfshutze009 said:
If I'm not mistaken the Pentium also introduced the use of two ALU's (Arithmetic Logic Units) which allowed it to perform multitasking.
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yes, that's part of it being superscaler. On a regular Pentium board, there's a 64-bit data bus to feed both execution pipelines and help keep the prefetch unit full. The 486 Pentium-OD was changed so that it would work with 486 boards' 32-bit data buses. So the two ALU's are constantly draining the pre-fetch queue and then having to wait turns to access memory. The doubled cache helps alleviate some of it, but it's just a bandaid.

The only real benefit you DO get from the P-OD is the ability to use software that uses the instructions that were introduced with the Pentium line.
 
brycejones said:
Shouldn't it be the same settings as either a 33DX or 66DX2? I thought these overdrives were intended as drop in replacements.
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After reading the instructions for the Pentium Overdrive I confirmed that nothing would happen if I choose the wrong jumper settings that it would not work and that step 6 in the manual says "Set jumpers or switches if required, so at first I set the jumpers to the DX,DX2 NON-SL Enhanced and got it to POST. However it wouldn't complete the POST and keep beeping on and off, so I figure it must have to be set as DX2, DX4 NON-SL Enhanced because of the 83 MHz clock speed of the chip. This would put it between about 66MHz and 100MHz the average speeds of the DX2 and DX4 processors and I got this below.

IntelPentiumOverdrivePOSTscreenshot.jpg


This means you must be right about it being a drop in replacement. However I'm sure the voltage setting of 5V made a diffence as well because page 32 says Voltage Regulation On-Package Voltage regulation for conversion of the 5 Volt system supply to a 3.3 Volt supply for the processor which might explain why the mosfet was burning up if the processor was trying to draw more power. After trying to get the floppy drive to work I only got it to POST one more time, so now I need to figure if I have the floppy drive connected correctly because the light would not turn off on the drive. I change the colored wire to the left side of the drive as indicated by the A+ Guide to Managing and Maintaining Your PC by Jean Andrews which suggests that pin 1 is on that side if their is an Arrow below the pins on that side and left the cable with the colored wire plug in on the left for the motherboard and nothing. I completely disconnected the floppy drive and still cannot get it to POST again. Anyone have any ideas.
 
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Met-AL said:
Try pulling some RAM out.
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I'm sorry I should have mentioned that I had the same problem with the AMD 5x86 recently. Considering I haven't touched the RAM there shouldn't be anything wrong with it. I've narrowed it down to two possibilites its either the CPU or the motherboard because I did almost fry the Mosfet and I didn't touch anything else except the CPU. There is a slight chance that it could be the video card since I removed it to plug the floppy drive cable back in.
 
You're probably going to have find another board. PC Chips (aka Amptron aka ...) has never been a reliable board manufacturer.
 
ryan_975 said:
You're probably going to have find another board. PC Chips (aka Amptron aka ...) has never been a reliable board manufacturer.
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Ok I got it to partially POST, but now it won't stop beeping on and off. As for finding another board there aren't very many choices that are better than this board that I've seen.
 
ryan_975 said:
I would place my bets on there being a fault in the board as the source of all your troubles up to this point.
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Ok I ordered two new used ones off ebay and finally got them this week.
I tried the first one after transferring all the part to it, remove the hot glue on the jumpers and headers, and setting the jumpers. It Posted up on the on the first attempt but froze. Then I connected the power LED and PC speaker and it POST fine before I decided to connect the floppy drive cable. After I did that it wouldn't POST, but the CD-ROM drive opens and the fans are spinning. The only thing I did besides connect the floppy drive cable is remove the video card so I wouldn't bend the board.
 
scharfshutze009 said:
First of all I sold my Core i7 975 Extreme and the motherboard. Second my Core 2 Duo doesn't need overclocked everthing runs fine even GTA IV. I also can't say I'm satisfied with the temperature that both Cores are running at. However I will have to do something about the air flow in the front of the case, so I am switching from the Cooler Master 1100W UCP to the Silent Pro. I don't tweak my other computers either I'm just going to finish building them. So far its been fun watching the Amptron DX-9700 count 256MB of RAM which is as far as I've got for now. When I get the hard drive I will configure the SCSI hard drives and install the OS. The Intel PR440FX with Dual Pentium II Overdrive Processors needs alot more. I will install Windows Server 2003 on that then maybe Linux. Then I have A the Super Micro PIIIDR3 serverboard that will have Dual Pentium III 1.0 Ghz and 2GB of RAMBUS ECC at 3.2 GB/s. None of this is really that advanced compared to my Asus Z8PE-D12X server motherboard, but it all in good fun and gives me the chance to experiment with different types of SCSI interfaces.
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By the way I ditched the Core 2 Duo Build off the Asus P5E Professional once I found out I would be stuck with ATI for crossfire and that the board wouldn't support SLI. Also the performance of the ATI Radeon HD 4890s were terrible for Grand Theft Auto IV if not the entire build. Now I have a build off the Core i7 980X and the Asus Rampage III formula formally the MSI Big Bang X-Power and 2 Nividia 3GB GTX 580's. Also If I want to relive the Core 2 Duo era I still have the 8GB of OCZ reaper and another 8GB of OCZ flex for an ultimate rig with watercooling to use with an Asus Striker Extreme and Asus Striker II Formula.
 
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scharfshutze009 said:
Ok I ordered two new used ones off ebay and finally got them this week.
I tried the first one after transferring all the part to it, remove the hot glue on the jumpers and headers, and setting the jumpers. It Posted up on the on the first attempt but froze. Then I connected the power LED and PC speaker and it POST fine before I decided to connect the floppy drive cable. After I did that it wouldn't POST, but the CD-ROM drive opens and the fans are spinning. The only thing I did besides connect the floppy drive cable is remove the video card so I wouldn't bend the board.
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Its been almost 2 years since my last post about this and not much has changed. I'm on my third motherboard and still the system refuses to POST when I turn it on. That computer is sitting near the door way to my room at the end of my bed and I have not attempted to use it since my last post. I honestly don't think I have any further use for it and I can see why it is so rare because the motherboards don't last long when using the Pentium overdrive with it apparently. Also my friend Chuck gave me his Computer based off the Pentium 200Mhz and an unidentifiable motherboard, but it works. I transferred the 256MB to that computer and attempted to install Windows XP with was my goal for the 486 motherboard with the Pentium Overdrive because Toms hardware said you could install Windows XP on a 486 but you can't do anything meaningful. What I found is that its a pain in the ass because I have yet to find a 486 that works and that can boot from CD-ROM, like the Pentium Computer my friend Chuck gave me. I currently have a Pentium 233Mhz, 256MB of RAM, a Diamond Viper V330 using the Nvidia RIva 128zx chip, a Yamaha XG sound card, a 4 port USB card, and a D-Link 530TX+ ethernet card all ready for me to play Final Fantasy VII and many other classic games on. However, with the limited hard drive space of 10GB my Pentium III computer off the Asus TUSL2 will probably be used for that instead eventually. Also I want to complete my build off the Asus CUC2 using 1GB of Rambus for that as well.
 
scharfshutze009 said:
Its been almost 2 years since my last post about this and not much has changed. I'm on my third motherboard and still the system refuses to POST when I turn it on. That computer is sitting near the door way to my room at the end of my bed and I have not attempted to use it since my last post. I honestly don't think I have any further use for it and I can see why it is so rare because the motherboards don't last long when using the Pentium overdrive with it apparently. Also my friend Chuck gave me his Computer based off the Pentium 200Mhz and an unidentifiable motherboard, but it works. I transferred the 256MB to that computer and attempted to install Windows XP with was my goal for the 486 motherboard with the Pentium Overdrive because Toms hardware said you could install Windows XP on a 486 but you can't do anything meaningful. What I found is that its a pain in the ass because I have yet to find a 486 that works and that can boot from CD-ROM, like the Pentium Computer my friend Chuck gave me. I currently have a Pentium 233Mhz, 256MB of RAM, a Diamond Viper V330 using the Nvidia RIva 128zx chip, a Yamaha XG sound card, a 4 port USB card, and a D-Link 530TX+ ethernet card all ready for me to play Final Fantasy VII and many other classic games on. However, with the limited hard drive space of 10GB my Pentium III computer off the Asus TUSL2 will probably be used for that instead eventually. Also I want to complete my build off the Asus CUC2 using 1GB of Rambus for that as well.
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I think you need better boards.
Unfortunately, I don't have any knowledge of that era, as the first time I started STUDYING motherboards directly (instead of prebuilt systems) was when I was ready to DITCH the P83 overdrive for something faster.

I bought that overpriced P54T, I think in 1994 (I'm SURE It was called a P54T and not a P24T, at least back THEN it was). I had a Zeos 486 dx2/66 and that board had official support for the P54T overdrive. I honestly can't remember if there was a jumper setting for it, but I think you simply used the 33 mhz setting, which was the same as for a dx2/66 (2x internal clock rate). That CPU worked fine, until I ditched it for a Pentium 133 (temporarily) on a much better Shuttle board, and then later an unlocked 166 MMX that would go up to 262.5 mhz (83 bus speed). (of course I was unhappy that that shuttle board was supposed to have support for the K6-2 AMD processor, and then it wound up not having it when the cpus came out...)

CPU ran fine, but was a completely horrible waste of money. While indeed faster than the original dx2/66, It was slower than the real Pentium 90, and may have been only about the same in benches as a Pentium 66, although I don't remember why that was the case. Basically, the CPU speeds jumped up so much that if you "needed" a speed upgrade for a dx/2, the overdrive simply didn't do enough. It did benefit the games of that time ('92-'94 games), but anything after that simply didn't benefit. While stuff like Doom, Descent, Tie fighter and stuff ran just fine, I don't think Daggerfall performed very well. I can't remember how well Qtest ran, but I remember us having a LAN playing Qtest, and it running fine, while the release Quake 1 was pathetic on it.
 
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TIGR said:
LOL

Anyway, props for doing something different!
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Agreed. Hell, if I would have the space I would do something like this myself, build a badass DOS game rig, with Sound Blaster 16 and all. :D
 
Usually if the floppy drive light is on when you start the pc then the ribbon cable is reversed. The old 5 1/4 floppies used a ribbon cable that slipped onto a pc board with 'fingers' at the rear of the drive. There is a notch cut in that pc board that some cables had a corresponding 'pin' for and some didn't. For some reason on some cables it was even removable, making it easy to connect backwards. Doing so won't hurt it, just reverse the connection.

I would try pulling out all but one memory stick to see if it will boot (if you haven't already). If that doesn't work then I would get a 4 or 8 MB 72 pin stick and give it another shot. There were memory compatibility problems back then, some with design and others with the limit a board can boot with. While 256 MB is nice in a system like that, if memory serves me right (no pun intended!) most boards maxed out wayyyy below that. Other issues (if I remember correctly) were memory banking options (BIOS), density/design and speed. I spent a lot of time playing with self-built 486 systems running on the ragged edge and tweaking them to run well was a chore at times.

I don't know if any of this can help but good luck! I have a bunch of old stuff I should play with if I ever find the time.
 
OP, you need to overdrive that Overdrive! Slap on the latest, greatest, best, and most efficient heatsink today and overclock it to silicon kingdom!
 
Cerulean said:
OP, you need to overdrive that Overdrive! Slap on the latest, greatest, best, and most efficient heatsink today and overclock it to silicon kingdom!
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Uhh there is no way to mount a current heatsink to this processor unless I use thermal adhesive, which wouldn't be a good idea. Also with an original design flaw of the processor being in the way of the expansion slots it would be even more of an obstruction.
 
DrDoug said:
Usually if the floppy drive light is on when you start the pc then the ribbon cable is reversed. The old 5 1/4 floppies used a ribbon cable that slipped onto a pc board with 'fingers' at the rear of the drive. There is a notch cut in that pc board that some cables had a corresponding 'pin' for and some didn't. For some reason on some cables it was even removable, making it easy to connect backwards. Doing so won't hurt it, just reverse the connection.

I would try pulling out all but one memory stick to see if it will boot (if you haven't already). If that doesn't work then I would get a 4 or 8 MB 72 pin stick and give it another shot. There were memory compatibility problems back then, some with design and others with the limit a board can boot with. While 256 MB is nice in a system like that, if memory serves me right (no pun intended!) most boards maxed out wayyyy below that. Other issues (if I remember correctly) were memory banking options (BIOS), density/design and speed. I spent a lot of time playing with self-built 486 systems running on the ragged edge and tweaking them to run well was a chore at times.

I don't know if any of this can help but good luck! I have a bunch of old stuff I should play with if I ever find the time.
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You can't pull out all but one memory stick can you. A bank is 2 slots, so doesn't that mean I need at least 2 sticks of RAM in each bank. I put 2 sticks of 64MB HP memory for a total of 128MB. The board max out at 256MB though and I'm not sure what you mean about density, but the system posts now. However, I still cannot get it to boot from the floppy drive. When attempting to boot from floppy it says "Drive not Reay Insert Boot diskette in A: Press any key when ready?" for every boot disk I've tried. I don't have this problem with reading the disks in any other computer I have with a floppy. Thank you though this is the first time it has posted in months and almost years since I got the Pentium Overdrive working in it. Now if only I knew if it had a bad floppy drive then I could install an operating system.
 
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