LGA775 3.4GHz Overheating & Underclocking Issues

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teh RedUnit

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Mar 22, 2005
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First off, here are my PC specs:

Intel P4 550 3.4GHz
Asus P5GDC-Deluxe Mobo
Asus EAX600TX/TD Video Card
1x 120mm intake fan, 1x 120mm exhaust fan
WD 36GB Raptor SATA Boot Drive
WD 250GB SATA Storage Drive
Coolmax CR-450B 450W PSU
Zalman CNPS7000B-Cu HSF w/ LGA775 adapter clip

Okay, I just upgraded my PC from a 2.4C P4 which I had running at a cool 29 degrees idle with the same HSF and case fans. I decided to buy the LGA775 adapter clip for my Zalman HSF because the HSF did a great job at cooling my old Northwood.

On this 550 CPU, my idle temps are around 55 degrees and have gone as high as 79 degrees while installing Photoshop and other applications. My mobo temperatures however, stay at around 33 degrees. I used Artic Silver 5 and got those temperatures. I also have the Zalman HSF running at full blast (2500 RPM), PSU at full blast, both case fans running at ~1600 RPM. Both BIOS and Asus PC Probe give pretty much the same temps, so I'm guessing they are accurate.

Also, my CPU is running at only 2.8GHz (200MHz x 14) and I don't know why. I can't immagine the temps if it was running at a full 3.4GHz. Is this the Mobo underclocking the CPU because of high temps?

Here's what I've done so far:
I removed the HSF and re-applied the AS5 but still kept temps high. I've been reading other people's problems but I haven't found anyone with the same mobo and cpu combo as I do. I am tempted to remove the Zalman HSF and use the stock HSF, which I am doubting will do a better job. I've also ran the comp with and without the side panel but still get the same results.

I've already read Intel's temperature recommendations for the Prescott, and while at idle, it's somewhat whitin range, 79 degrees at load is way too high and I am concerned. The underclocking is still a mystery to me and I don't want to try and raise it because of fear of higher temps.

Any help would be greatly appreciated. Thanks
 
Hey,
I have had some heat problems too and I have searched over the net a lot also and read many things..
Right now I have a 3.2 540 Prescott running at 35C idle with the stock heat sink..
As you may probly now, Presocotts do generate more heat than others, but what you have is too high so it has soemthing to do with cooling.

It is very probable that its not ur fans since ur MB is at 33C.
I think its your Heatsink. Either you did not seat it well, or its not enough good.
But I think it would be the second option
I decided to buy the LGA775 adapter clip for my Zalman HSF because the HSF did a great job at cooling my old Northwood.
Click to expand...

I think the Zalman HSF is not adequate for the Prescott you have now, so you should check for a new, better heatsink. From the reviews I have read, i'd suggest the XP-120 or XP-90, i dont remember which one exactly has the adapter for LGA775.. (Go check ThermalRight's website)

Also, if u have an optional hole for a fan on the side of ur case, u could try to put a duct that would bring cool air directly to ur CPU, thats what I did and it helped reduce temps 5 degrees lower..

Anyways, don't worry, as described in this website, your CPU is not likely to get damaged .Go there and read whats in the cpu section, it may help you to better understand the "underclocking"

If your cooler is insufficient and the temperature exceeds the maximum operating temperature, then this does not mean that the CPU is automatically damaged. With AMD CPUs, you will usually encounter crashes if the CPU is overheated; but these go away as soon as the CPU is cooler again. In the long term, running the CPU at a temperature that is too high may reduce the CPU life, since an overheated CPU is more prone to electromigration - even if it runs stable.

With P4 CPUs, the CPU will turn its speed down automatically when it overheats. No damage to the CPU is possible, but the system will get slower while it's hot (which, in some cases, users might not even notice).
Click to expand...

So good luck with everything, and keep it updated! :)
 
I just found out my 3.4GHz CPU is an ES. I hope that's not affecting the temps. I know Engineering Samples are highly sought after by Overclockers for their unlocked multipliers. Mine has 14-17 unlocked. Does anyone know how much a 3.4GHz ES would run for? (Slighly used ofcourse)
 
i had trobles too installing my stock H/F on my prescott 3.0e
due to its 2 piece heatsink and fan assembly it looked strait but it wasent as i too seen outragus temps! after about the 6th try i finaly got it on strait, i have found that laying the computer on its back so that you can press strait down has help me install these lill buggers. you should see no higher than 55c under heavy load with stock H/F + articsilver.
i would expect to see about 29c idle temps and about 44c under heavy load with a good copper H/F + articsilver.

Worrie about the clock speed after you get your cooling fixed :)

As far as your cpu beeing a unlocked multi. as that's realy cool and i'm not shure how you ladded one... i dont expect it to bring much more than a 3.4 socT (775) the reason i say this is becase moveing the multi down from 17 would probly only hurt your max cpu speed. not that it's not nice for finding your optamal performance with any givin type of ram..

i would most likely just hold on to it and enjoy the free multi :D


_______________________________________________________________
Current System:
3.0e @ 3.9 1.488v core
OCZ 4400 2x512MB 3-4-4-8 MEM (realy great over clocking ram btw)
Gigabyte GA-8IPE1000-G (springdale) (only bought this mobo becase it was cheep and has nice holes for mounting north bridge water block + still waiting for my epox board to come back, this board is crap for good mem scores cant run t1 unless you want to run like 100mhz fsb tryed 4 diff brands of memory too :( good backup board for cheep tho)
Leadtek 6800GT @ 415-1.12
2 40gb wd 2mb sillicon image chipset raid0 pulling 85-88MB/s
1 250gb wd 8mb
cheap o case and 600w ps
 
The Zalman 7000-series sucks for today's CPUs, it was only good up until northwood.
 
If the CNPS700B-Cu is not enough for my Prescott, then I guess I'll sell it on eBay and get a newer one.
 
teh RedUnit said:
If the CNPS700B-Cu is not enough for my Prescott, then I guess I'll sell it on eBay and get a newer one.
Click to expand...

Not too much in the market for LGA775, though, pitty. I can't really recommend anything.

Formula383 said:
the reason i say this is becase moveing the multi down from 17 would probly only hurt your max cpu speed. not that it's not nice for finding your optamal performance with any givin type of ram..
Click to expand...

not true at all, the very reason my P4 can go so high is the multiplier not running a full 18

I very much doubt that it is an ES, does CPU-Z reported as an ES? The board you have does, indeed, unlock multipliers on prescotts, that is why I ask.
 
Can you choose any multiplier between 14 and 17? Many non-ES D0 stepping prescotts have the 14 and 17 multis unlocked, but nothing in between.
 
I haven't figured out how to change the multiplier and I have the latest BIOS on my motherboard. CPU-Z does report it as an ES. Here's a screenshot:

cpuz7vx.jpg
 
I don't want to spend a lot of money on water cooling, as I'm short on cash right now, plus I don't overclock much, which is why this ES chip (if it is an ES) would not be advantageous to me.

And no, I don't know how much an ES chip goes for.
 
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