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How hot is too hot for a Prescott SL7E2?

C

computer

Platinum Member
Hey guys. I have a (I "assume") Prescott SL7E2 that is really hot. This is a P4 2.8ghz/533/1mb. It's going on a customer's PC who of course doesn't want to spend much on a HSF unit. I got a Spire SP436B0 QuadroFlow for it, which they claim DOES support Prescott's to 3ghz, and that POS runs HOTTER than the stock retail Intel HSF unit that was only made for a 2.4ghz Northwood!! I'm getting 140°F at idle, in the BIOS! I took the crappy 70mm fan off, (of which the Spire jerks overrated). They claimed it was ~23cfm but I checked the # and it's less than 18cfm! I put a 60mm 38cfm Delta on it and got it "down" to 131F. I tried the stock retail Intel HSF unit w/the Delta and got it down to 129F, but that's still waaaaaay too hot for idle!! I've also tried several types of TIM I have, and they all are about the same. Mobo is a QDI 2PE/800 Pro 6AL.

The thermal spec for this CPU is only 156F, so if it's 129F at lowest at idle, that SOB is going fry under load! Now I'm wondering if something is wrong with the CPU. I got it 'accidentally'. I had ordered a PIII S370 CPU for a customer's PC and instead the vendor sent me this P4 Prescott. I made sure it worked, then I didn't say anything about it. (I got the PIII S370 customer another CPU from elsewhere). So I'm wondering if this SL7E2 I have was a refurb unit or defective.

Is this temp too high for this CPU, or by some chance or quirk does this CPU not get much hotter under load? If another HSF unit will be better, it has to be below $20 shipped. I see these at NewEgg/Chiefvalue that at least "look better on paper" than that crappy spire:
http://secure.newegg.com/NewVersion/Fee...Review.asp?DEPA=0&Item=N82E16835106606
http://www.newegg.com/Product/Product.asp?Item=N82E16835101203
http://www.newegg.com/Product/Product.asp?Item=N82E16835101203
http://www.newegg.com/Product/Product.asp?Item=N82E16835150041
The last two showed up in a sub-search for "Prescott", but as you can see, NewEgg's search is screwed up and they apparently have nothing to do with a Prescott CPU! So looks like the first 2 are the only ones.

Any info appreciated.
Thanks.

 
First I really dont understand why anyone who wants to go the Intel route buys prescott. What the hells wrong with Northwood ? Yes I know it's 400 Mhz behind the flagship (3.4 Ghz Vs 3.8 Ghz) But how much more you need ?

Did you do your homework on this CPU before you bought it ? its slightly slower then northwood and runs hotter.

As for the heatsink issues you seem to have, I'll leave that to the more experianced members of the board.
 
Dude, tell that costumer of yours that if he/she doesn't invest in a proper heatsink/fan, that CPU is gonna fry. Oh, and I'd put a Zalman CNPS7700-Cu on that thing 😉.
 
Originally posted by: clarkey01
First I really dont understand why anyone who wants to go the Intel route buys prescott. What the hells wrong with Northwood ? Yes I know it's 400 Mhz behind the flagship (3.4 Ghz Vs 3.8 Ghz) But how much more you need ?

Did you do your homework on this CPU before you bought it ? its slightly slower then northwood and runs hotter.

As for the heatsink issues you seem to have, I'll leave that to the more experianced members of the board.
Click to expand...
Did you read my post? Obviously not. Please read again. 😉 I didn't buy it.

Thanks Vegitto and Clarkey, he'll never go for that price though. :frown: The Thermaltake A4005 looks better than that Asus and other Ttake unit, much larger HS.

 
Originally posted by: computer
Originally posted by: clarkey01
First I really dont understand why anyone who wants to go the Intel route buys prescott. What the hells wrong with Northwood ? Yes I know it's 400 Mhz behind the flagship (3.4 Ghz Vs 3.8 Ghz) But how much more you need ?

Did you do your homework on this CPU before you bought it ? its slightly slower then northwood and runs hotter.

As for the heatsink issues you seem to have, I'll leave that to the more experianced members of the board.
Click to expand...
Did you read my post? Obviously not. Please read again. 😉 I didn't buy it.

Thanks Vegitto and Clarkey, he'll never go for that price though. :frown: The Thermaltake A4005 looks better than that Asus and other Ttake unit, much larger HS.
Click to expand...

Yeah i did read and was reffering to the comsumer, sorry I didnt make that clear, but whatever helps you sell more stock🙂
 
Originally posted by: clarkey01
Originally posted by: computer
Originally posted by: clarkey01
First I really dont understand why anyone who wants to go the Intel route buys prescott. What the hells wrong with Northwood ? Yes I know it's 400 Mhz behind the flagship (3.4 Ghz Vs 3.8 Ghz) But how much more you need ?

Did you do your homework on this CPU before you bought it ? its slightly slower then northwood and runs hotter.

As for the heatsink issues you seem to have, I'll leave that to the more experianced members of the board.
Click to expand...
Did you read my post? Obviously not. Please read again. 😉 I didn't buy it.

Thanks Vegitto and Clarkey, he'll never go for that price though. :frown: The Thermaltake A4005 looks better than that Asus and other Ttake unit, much larger HS.
Click to expand...

Yeah i did read and was reffering to the comsumer, sorry I didnt make that clear, but whatever helps you sell more stock. 🙂
Click to expand...
He didn't buy it either, no one did. It was sent to me as a mistake and I was going to use it on my test bed PC, but I instead offered it to another customer since I don't need a 2.8ghz CPU on my back-up/test PC. 🙂

 
Originally posted by: Vegitto
Well, did you ask him? Just go like:"If you'd buy this one, your PC could run a lot longer."
Click to expand...
No, but I will. I'm going to try a couple more things, but from the looks of it, it's not going to get any cooler than 129°F with what I have. I've tried the TIM that came with that POS Spire; Nanotherm PCM+, Blue II & Silver XTC; and some generic silver based TIM. What I find strange is that they ALL gave the same results!

So, do any of you think that is hot, or is that normal for a Prescott? Like I indicated earlier, the Intel thermal spec is only 156°, so I think something may be wrong with this CPU......unless anyone can tell me this is normal.
 
Well, I'm not sure if Prescott's are suposed to fry like that. I know that they get VERY warm. Without proper cooling, it won't last more than 2-3 hours tops. I wouldn't let it run for a while. Let me advise you, don't even sell it to someone that doesn't want to invest in proper cooling. If they buy it without the cooling, and the thing goes kaputt (which I wouldn't find strange), you'll get the blame. Chance is, they'll demand a new one.
 
Thats a bit high for an Idle temp, how high does it get under load(preferably in celcius)? My 3.4 got to about 72c under load on air, while my 3.2(@3.6) and my 2.8(@3.5) never get above 57c and 63c. The thermal protection will keep the chip from burning up, if it gets too hot it will shut down. Also you should run throttlewatch while it's under load to see if it's throttling. If it is, it's running to hot, if it isn't then while it's still running hot, you don't need to worry too much.
 
I'm not quite sure about the prescott vs. Northwood thing.

As software becomes more demanding, shouldnt the Prescott become a great advantage?

I thought the prescott beat out the northwood is some categories?

Either way, they are super close.

I Installed a few northwoods and a few Prescotts that were in the up 2.x range and Hardly saw a temp difference. The NEW intel stock HSF that comes with the prescott should be totally adequate for non-over clockers.

I have a 2.8 prescott that runs at about 41c at idle, 54c at full load.

Its in a small case with 1 96mm rear case fan that is only 2cm from the heatsink fan set, so im guessing is makes a nice streamline of air.

You shouldnt be able to fry the CPU if it can throttle back.

I put my vote in for the stock heatsink/fan unit, the new one, made for the prescott.

THe 2.8 shouldnt be gettin very hot, its the prescotts in the 3.x range that feel like there being over clocked right outa the box.
 
Originally posted by: MonkeyWrench4000
I'm not quite sure about the prescott vs. Northwood thing.

As software becomes more demanding, shouldnt the Prescott become a great advantage?

I thought the prescott beat out the northwood is some categories?

Either way, they are super close.
Click to expand...

I did some comparisons between my 3.06Ghz northwood@ 3.45ghz, and my 3.4prescott @3.82ghz. The northwood came out ahead in many things, tied in some, and lost in others. The prescott seemed to do better with multitasking benchmarks, video encoding, and things such as SuperPI, while the northwood did better in rendering, audio encoding, file compression/decompression. The prescott has double pumped ALU's, so it's interger performance is improved, the northwood was better at FPU operations. With my other prescott running at 3.45, the northwood beats it in just about everything except for SuperPI, and they are configured very similarly.
 
Once again, I never received any notifications that anyone replied since my last post! I happened to find this thread on Google of all places while I was trying to search for more info on this issue. I found this rather interesting:
http://www.rojakpot.com/default.aspx?location=8&var1=0&var2=57 Note what it states about the "thermal monitor" only being for P4 CPU's with 512k cache! Is this correct? Doesn't sound right. If so, it could be this mobo isn't accurately reading the temp of the Prescott (1mb cache). ?

I flashed the BIOS to the latest version, and the temps now actually show HOTTER, about 131° at best. I put a thermal sensor on the underside of the mobo where the CPU socket is located, and one under the HS next to the CPU, as close to the CPU as I could get it. The one next to the CPU reads about 93° and the one on the underside of the mobo reads about 84° which are both great. I'm more inclined to believe these boards have a "flaky over-protective" thermal diode like Abit motherboards have. Nonetheless I'd still like to be POSITIVE of this and get it lower, I'm sure this other HSF unit I have en route (A4005 Ttake) and new TIM (AS5) will drop the temps. That A4005 has a much larger HS than this crappy Spire I first got, plus it states it supports Prescotts to 3.6ghz+ where as the Spire (obviously lying) said to 3ghz. The A4005 is aka "TR2 M5 SE(P4)".
http://www.tr2tt.com/products/coolers/m5se/m5se.htm

Ok, to answer some of your posts:
Thats a bit high for an Idle temp, how high does it get under load(preferably in celcius)?
The customer isn't getting a HD or complete PC, just a mobo, CPU and memory so I don't have any HD connected, no OS, therefore don't know about loads.

MonkeyWrench, no, the Northwood 800mhz/HT is faster due to of course the higher FSB, memory bandwidth, and HT (HyperThreading). Benchmarks show it to be faster than a 533mhz FSB Prescott, even when the Prescott is much faster clock speed wise. Of course this would change with 800mhz bus HT Prescotts.

I looked for a retail Intel Prescott HSF unit and could not find one. All of the temps for you guys are much lower than this one. This is either a bad CPU, or, the mobo just isn't giving accurate temp readings.
 
Originally posted by: computer
Once again, I never received any notifications that anyone replied since my last post! I happened to find this thread on Google of all places while I was trying to search for more info on this issue. I found this rather interesting:
http://www.rojakpot.com/default.aspx?location=8&var1=0&var2=57 Note what it states about the "thermal monitor" only being for P4 CPU's with 512k cache! Is this correct? Doesn't sound right. If so, it could be this mobo isn't accurately reading the temp of the Prescott (1mb cache). ?

I flashed the BIOS to the latest version, and the temps now actually show HOTTER, about 131° at best. I put a thermal sensor on the underside of the mobo where the CPU socket is located, and one under the HS next to the CPU, as close to the CPU as I could get it. The one next to the CPU reads about 93° and the one on the underside of the mobo reads about 84° which are both great. I'm more inclined to believe these boards have a "flaky over-protective" thermal diode like Abit motherboards have. Nonetheless I'd still like to be POSITIVE of this and get it lower, I'm sure this other HSF unit I have en route (A4005 Ttake) and new TIM (AS5) will drop the temps. That A4005 has a much larger HS than this crappy Spire I first got, plus it states it supports Prescotts to 3.6ghz+ where as the Spire (obviously lying) said to 3ghz. The A4005 is aka "TR2 M5 SE(P4)".
http://www.tr2tt.com/products/coolers/m5se/m5se.htm

Ok, to answer some of your posts:
Thats a bit high for an Idle temp, how high does it get under load(preferably in celcius)?
The customer isn't getting a HD or complete PC, just a mobo, CPU and memory so I don't have any HD connected, no OS, therefore don't know about loads.

MonkeyWrench, no, the Northwood 800mhz/HT is faster due to of course the higher FSB, memory bandwidth, and HT (HyperThreading). Benchmarks show it to be faster than a 533mhz FSB Prescott, even when the Prescott is much faster clock speed wise. Of course this would change with 800mhz bus HT Prescotts.

I looked for a retail Intel Prescott HSF unit and could not find one. All of the temps for you guys are much lower than this one. This is either a bad CPU, or, the mobo just isn't giving accurate temp readings.
Click to expand...

Well, you get what you pay for 😛. Seriously, either sell that thing with a heatsink (preferably Zalman), or don't sell it at all. They'll blame you if it goes kaputt.

 
My guess is that your mobo is lying, my DFI says that my 3400+ runs up to 64 celcius under load with a fancy-shmancy zalman alcu heatsink, which is bunk. Put a decent heatsink on it and get it out of your life 🙂

Nat
 
I am wondering what does the case cooling consist of??? What I have seen is you have to have top of the line 3-4 case fans 80-120mm fans to even keep this thing cool.....What case?? How many fans and where?? PSU and number of fans??

I think you could find something in the high 20's low 30's that should be able to do better then the stock HSF....129f?? OUch!!!!! That is 54c at idle...Oh yes it wil hit 70+c under full loads and will not burn up but it will throttle...I suggest you get a program called Throttlewatch and run it and then go ahead and run an app like prime95 and superpi 32m at the same time and watch the throttlwatch on the screen and see if it starts throttling.....Throttling you know as the process of the chip manually slowing itself to reduce heat and cool without frying.....

The real sad thing is this is a lousy 2.8ghz and not even the 3.8ghz model that comes out......

If the above throttlewatch shows no throttling at 70c or 158f then the board may be reporting to you false readings....
 
I'd be VERY careful with kicking the motherboard for reporting false results. I had a Duron once, that fried because I didn't believe my mobo.
 
I have!!! It was called an Abit IC7...It reported same chip 10-12c higher then on different board....I also ran the cpu at 72c to se if it would throttle and it would not which contradicted many who had northwoods throttling around 65c.....

The y are extremely inaccurate...many boards right now have bios fixes for temperature reporting issues. many have flawed ways of calibrating the temp and that leads to issues....

I would trust a mobo temp reports with a grain of salt and virtually never compare them across different boards.....The best way is to measure yourself...
 
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