I have this board here, D850MD (sheet: ftp://download.intel.com/support/motherboards/desktop/d850md/productbrief.pdf). it has 4 RDRAM sockets. I have two RDRAM sticks. i put them in next to each other, boot it up and it goes BEEP...BEEP...BEEP. so I probabily screwed up the RDRAM. Do I need continuity modules for the unused set of slots? or is this something else? proc should be good, board should be good, ram sticks were giving a friend problems but they should at least BOOT. its got a 1.8 celeron in it. thanks
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is RDRAM being a jerk?
- Thread starter kronchev
- Start date
the first RDRAM (600 and 800) was slower than regular SDRAM. so the proc isnt going to be slowing it down or anything
i guess ill sell this board and ram and just buy some DDR for the other one I have, although this one is mATX which I like...
Originally posted by kronchev
the first RDRAM (600 and 800) was slower than regular SDRAM. so the proc isnt going to be slowing it down or anything
No way. It was only 6 months ago that I moved from my PC800 RDRAM to DDR when it went dual channel. That was because the RDRAM was getting outrun then when I ran it at PC1000 speeds overclocked. So, your assertion that SDRAM was faster than PC800 dual-channel RDRAM is simply wrong.
Johnny MO
I cant find my source, so it looks like you win this round...
savantu: are you freaking serious??? now that I look at the spec sheet it doesnt say it is either. looks like its time to use that full atx board. also its not the chipset thats fast, its the ram, just remember that one may be fast for burst, but the other wins at overall transfer
FanZ: no, not really. the first P4's, up to the Northwood core (which I believe this is), were slower than their P3 counterparts. IIRC, of course.
_G_: apparantly thats whats been decided. of course even if I had them I apparantly dont have a compatiable processor so its a moot point now
SuperSubZero
2[H]4U
- Joined
- Nov 21, 2000
- Messages
- 3,780
I used RDRAM in my primary computer right up until a couple of weeks ago when I put together a DDR400 system. It was only PC800 but it ran just fine. The technology is sound and fast. It's just that pesky RAMBUS company that screwed everything up.
while im at it...
since this chip has a 400 mhz bus, if I put it into a board that uses DDR, what speed do I need, PC2100? If I want to OC to a 533 bus (which supposidly this chip can do), thats PC2700 right? I probabily wont OC as this is for a car computer and its overkill at 1.8 as it is, but I'm just wondering...
since this chip has a 400 mhz bus, if I put it into a board that uses DDR, what speed do I need, PC2100? If I want to OC to a 533 bus (which supposidly this chip can do), thats PC2700 right? I probabily wont OC as this is for a car computer and its overkill at 1.8 as it is, but I'm just wondering...
Rambus is now working on a next generation RDRAM. DDRRDRAM, actually, as it combines the best features from both types of memory. Rumor has it it's not just dual channel, it's quad pumped as well! (Just like the p4 bus). It is also rumored to have very low latency. We'll just have to wait and see i guess. DDR-2 will be bad for AMD cores (current ones that is) because the high latency is very bad for the on-die memory controller. Although, it will be just as bad for next-gen Intel cores, as they will have an on-die NB too. If the next-gen RDRAM really has the wonderful qualities people are saying it will have, we may as well see the tables turned, and DDR-2 extinct.
GDDR-3 pwnz j00, though.
GDDR-3 pwnz j00, though.
Burning Phoenix
Limp Gawd
- Joined
- Dec 15, 2002
- Messages
- 438
Originally posted by kronchev
the first RDRAM (600 and 800) was slower than regular SDRAM. so the proc isnt going to be slowing it down or anything
i guess ill sell this board and ram and just buy some DDR for the other one I have, although this one is mATX which I like...
What?
PC133 Sdram has a peak theoritical bandwidth of 1066 MB/sec.
PC800 RDRAM has a peak theoritical bandwidth of 3200 MB/sec.
PC1066 RDRAM has a peak theoritical bandwidth of 4200 MB/sec.
YOu need the continuity sticks to continue the flow of data through all the slots in a serial manner.
thats what they do...last I checked rambus does 0 R+D
http://www.pcmech.com/show/memory/329/
http://www.fool.com/portfolios/rulebreaker/2001/rulebreaker010723.htm?source=EDSTRB
http://www.smrh.com/publications/pubview.cfm?pubID=257
^^ About how a few years ago they pushed heavily for the adoption of technology standards (SDRAM) that they alone held the patents for. they never told anyone they had these patients either.
rdram is slower than sdram. this is a known fact and explains why rdram was not adopted quickly. time sensitive electronics were better with sdram technologies than rdram. only the p4 could use rdram the way it did. BUT rdram has a tremendous amount of bandwidth that can be provided. big difference in the form of comprehension there.
- Joined
- Jun 28, 2002
- Messages
- 2,246
well, if you really want to get rid of it, I might be able to find a slot for it....
As for the technology itself, I think it was the Willamettes only redeeming quality. without it, they are even worse than they are. I've got a 1.8 Willy w/512mb sdram in a box at work that's terribly slow compared to a 1.5 willy w/256 rdram that I have at home. I built xp on both, so it's not software. SDram just can't keep up.
As for the technology itself, I think it was the Willamettes only redeeming quality. without it, they are even worse than they are. I've got a 1.8 Willy w/512mb sdram in a box at work that's terribly slow compared to a 1.5 willy w/256 rdram that I have at home. I built xp on both, so it's not software. SDram just can't keep up.
Renegade87
Limp Gawd
- Joined
- May 3, 2003
- Messages
- 237
As Andrewuk noted earlier, i850 will run with celerons. As long as you match the FSB speed (400MHz). I have a 2.0GHz celery on an Abit TH7-II and 512MB of Samsung PC800 RDRAM in my spare rig and it runs great.... for what it is.
Renegade87
Limp Gawd
- Joined
- May 3, 2003
- Messages
- 237
I can't believe all everybody's been doing here is ranting about Rambus throughout this thread.
As STL and Pappy have made clear, you do need the continuity modules (CRIMM's) in your open memory slots.
You said that you put your RIMM's "next to each other". One thing you need to double check is that the memory (and the CRIMM's) needs to be run in a specific channel (slots A & B or A1 & B1 depending on your Mobo). Just like the Dual Channel configurations on the latest i865 & i875 (among others) chipset mobo's. The CRIMM's would then go into the open slots (A1 & B1 or A2 & B2 depending on your Mobo). I couldn't tell from the product brief you linked to in your original post.
It looks like your CPU is compatible as the 1.8GHz celery runs at 400MHz so, if you get the CRIMM's and configure the modules correctly, it should work properly.
Now for my own rant:
Rambus (the company) Sucks!! Greedy aholes are they !! But, Intel and Rambus pioneered (for desktop pc's) the Dual Channel Memory Architechure at least 5 years ago with the i840 & i815 chipsets. The bandwidth was great, but the latency sucked.
I myself had a PIII Dualie with a Supermicro i840 dual slot1 board that had 2xPIII 733EB's and 512 MB Samsung PC800 RDRAM that really rocked. Probably the smoothest system I've ever built and/or owned.
Good luck kronchev. I hope you get it all sorted out.
As STL and Pappy have made clear, you do need the continuity modules (CRIMM's) in your open memory slots.
You said that you put your RIMM's "next to each other". One thing you need to double check is that the memory (and the CRIMM's) needs to be run in a specific channel (slots A & B or A1 & B1 depending on your Mobo). Just like the Dual Channel configurations on the latest i865 & i875 (among others) chipset mobo's. The CRIMM's would then go into the open slots (A1 & B1 or A2 & B2 depending on your Mobo). I couldn't tell from the product brief you linked to in your original post.
It looks like your CPU is compatible as the 1.8GHz celery runs at 400MHz so, if you get the CRIMM's and configure the modules correctly, it should work properly.
Now for my own rant:
Rambus (the company) Sucks!! Greedy aholes are they !! But, Intel and Rambus pioneered (for desktop pc's) the Dual Channel Memory Architechure at least 5 years ago with the i840 & i815 chipsets. The bandwidth was great, but the latency sucked.
I myself had a PIII Dualie with a Supermicro i840 dual slot1 board that had 2xPIII 733EB's and 512 MB Samsung PC800 RDRAM that really rocked. Probably the smoothest system I've ever built and/or owned.
Good luck kronchev. I hope you get it all sorted out.
PaulMuaddib
Weaksauce
- Joined
- Mar 25, 2004
- Messages
- 111
I used to run a 1.8 (socket 423) with PC800 on a 850gb i think it was, and it was smooth and very fast.
Continuity boards were a pain though but one thing I liked, albeit asthetic, was that RDRAM came with heat spreaders from the factory... and they were very thin, even with the spreaders on them. Now adays if you want heat spreaders on your ram... it makes them big and chunky.
Continuity boards were a pain though but one thing I liked, albeit asthetic, was that RDRAM came with heat spreaders from the factory... and they were very thin, even with the spreaders on them. Now adays if you want heat spreaders on your ram... it makes them big and chunky.