XP-90 to SI-120, 2* difference?

[Staz]

I have an Opteron 148 overclocked to 2.75GHz(11x250) that is rock solid stable, but runs a little hot. I had a XP-90 with a 80mm fan that produces around 50+CFM. With that combo, my idle temp was 49* and my Prime95 temp was 63*.

I thought that was a little hot, so I bought a new SI-120 with a 120mm Fanaflo high speed fan. Once installed and running, it gave me the same idle temp, and the Prime95 temp was 61*. That's a drop of only 2*!!! I was figuring at least 5*, hoping for 10*.

Does this sound normal? Can I do anything to drop the temp more? I really want to be in the low to mid 40's idle and upper 40's to low 50's full load.

 

[GalvanizedYankee]

The XP-90 takes a 92mm fan not an 80mm fan.

I have never heard of a Fanaflo, a Panaflo, a Chinaflo or a Japanaflo but never a Fanaflo

It would be hard to believe that both were cocked when installed, so forget that for awhile.

Questions that should be asked and answered, so that others may help you.

What was used to record temps?
Did you check with the side cover off and a room fan blowing in?
What kind of case and fan set-up?
Do your HDs block the intake air?

...Galvanized (G/N)

 

[shinzwei]

Originally posted by: GalvanizedYankee
The XP-90 takes a 92mm fan not an 80mm fan.
I have never heard of a Fanaflo, a Panaflo, a Chinaflo or a Japanaflo but never a Fanaflo

It would be hard to believe that both were cocked when installed, so forget that for awhile.

Questions that should be asked and answered, so that others may help you.

What was used to record temps?
Did you check with the side cover off and a room fan blowing in?
What kind of case and fan set-up?
Do your HDs block the intake air?

...Galvanized (G/N)

XP-90s do take 80mm Fans. They come with 80mm and 92mm fan clips.

 

[thisbarb]

Differences in ambient temperature?

 

[JEDIYoda]

Everything is based on your ambient room temperature....
if your ambient room temperature is 20c......vs 28c then your recorded CPU temps will be higher or lower based on the ambient room temperature.

You may ask why is it based on the ambient room temp and NOT the termps inside my case?

That is because you are blowing cool air into your case from out side your case....
thus again based on your ambient room temperature your reading will be higher or lower.

 

[Staz]

Sorry, that was a type-o, it is a Panaflo fan.

My clips for the 92mm fan broke, so I only have the clips for the 80mm, so had to use that.

Room temp is the same.

Case is a Antec P160, no side fan, but 3 120mm fans total, one front, one back, one CPU. I have one HD that is in front of the intake fan.

 

[1Dark1Sharigan1]

Well the SI-120 isn't THAT much better than the XP-90 and certainly not a 10C drop given equal ambient temps/equal fan CFM. What fan are you using for the SI-120?

 

[suszterpatt]

I'm surprised noone asked this, but what kind of thermal interface are you using?

 

[Dave Sz]

Why would you even put load on your CPU wtih a 49*c idle temp? That is just stupid cause you know that even the best coolers will not keep it under the 55*c "safe" temp. On the other had I figure that your temp readings are bad. If the heatsinks were really that bad or the contact was bad, your load temp would be much higher than what it is. Good air coolers have a idle to load temp difference of 12-14*c, which is what you have.

 

[AntiStatic]

i have an opty 148 with an SI-120 @ 2.95mhz It idles @ 29 and maxes out at 42. it sits inside a CM Stacker with a crossflow fan. Myabe you should look at your overall airflow through your case?

 

[suszterpatt]

Originally posted by: Dave Sz
Why would you even put load on your CPU wtih a 49*c idle temp? That is just stupid cause you know that even the best coolers will not keep it under the 55*c "safe" temp. On the other had I figure that your temp readings are bad. If the heatsinks were really that bad or the contact was bad, your load temp would be much higher than what it is. Good air coolers have a idle to load temp difference of 12-14*c, which is what you have.

55 °C is nothing dangerous. I believe the "safety limit" is at 60 °C, but most CPUs run with minimal to no errors even at those temps. It decreases the life of the processor though. As for the idle to load difference, my 3000+ is cooled by an XP-90 and a Zalman 92mm fan in silent mode, and my temps are 34 °C idle and 43 °C load. I'm sure that it could go lower if I cranked up the fan speed, let alone switching to a better cooler.

 

[Staz]

Using ArticSilver5. My Panaflo is the high output one, think just over 100CFM.

I have NEVER been able to reach the temps you guys boast about on ANY CPU, overclocked or not.

 

[shinzwei]

What motherboard do you have? Maybe its temperature sensor is borked.

 

[suszterpatt]

Originally posted by: Staz
Using ArticSilver5. My Panaflo is the high output one, think just over 100CFM.

I have NEVER been able to reach the temps you guys boast about on ANY CPU, overclocked or not.

Possibly a crappy mobo. Have you tried a BIOS upgrade?

 

[AntiStatic]

Originally posted by: Staz
Using ArticSilver5. My Panaflo is the high output one, think just over 100CFM.

I have NEVER been able to reach the temps you guys boast about on ANY CPU, overclocked or not.

maybe it has to do with where you put your pc. the higher in the room it sits the warmer the air it has to work with. I only use air to cool my computer-

http://img.photobucket.com/albums/v18/AeroSquid/ss11106.jpg

 

[aka1nas]

The first time I installed my XP-90, I ran it for over 3 months and my idle temps were around 40C. I was doing some work on my PC one day and ended up remounting the heatsink and reapplying the AS5. My idle temps were then down to 30C and even 25C with C&Q enabled. My load temp went from 52C down to about 41C. The heatsink hadn't been noticeably loose or mis-installed. My point is that it pays to make sure the core is making a good connection with the TIM and base of the heatsink. Even if you can get the clips on and it seems secure doesn't necessarily mean it is getting an optimal connection.

 

[Fallengod]

Yeah assuming you are installing it correctly to the cpu, it could be a faulty sensor. I just rma'd my epox 9npa+ ultra board for a new one becaue it had a faulty sensor as well. Something to consider.

 

[suszterpatt]

Originally posted by: modempower
Yeah assuming you are installing it correctly to the cpu, it could be a faulty sensor. I just rma'd my epox 9npa+ ultra board for a new one becaue it had a faulty sensor as well. Something to consider.

And I got a CoolerMaster Aerogate II that has 4 very accurate sensors to keep me updated for a looooooooong time.

 

[Staz]

Mobo is an Abit AV8. Needed AGP and 939-pin and wanted something very stable.

The case is almost at ground level, I have one of those desks with a built-in CPU holder that is nearly ground level.

I have mounted enough heatsinks to know when it is and isn't mounted correctly.

I had similar temps on my previous system when I OC'ed it, and that was with a different mobo, case, and HSF/CPU combo.

I had an oc'ed XP-M 2500+ that ran nearly identical temps for nearly a year without a hick-up, so my current temps don't bother me too much.

It just annoys me when I hear people with idle temps around 30* or lower, and full load temps in the mid 30's, all while overclocked! I just don't see how that is possible as hot as modern CPU's run, and I don't care how much air cooling you have.

 

[shinzwei]

Originally posted by: Staz
Mobo is an Abit AV8. Needed AGP and 939-pin and wanted something very stable.

The case is almost at ground level, I have one of those desks with a built-in CPU holder that is nearly ground level.

I have mounted enough heatsinks to know when it is and isn't mounted correctly.

I had similar temps on my previous system when I OC'ed it, and that was with a different mobo, case, and HSF/CPU combo.

I had an oc'ed XP-M 2500+ that ran nearly identical temps for nearly a year without a hick-up, so my current temps don't bother me too much.

It just annoys me when I hear people with idle temps around 30* or lower, and full load temps in the mid 30's, all while overclocked! I just don't see how that is possible as hot as modern CPU's run, and I don't care how much air cooling you have.

Actually modern CPUs run much cooler than the ones before it due to lower voltages. People with idle temps in the 30s and full load in the mid to upper 30s have water cooling kits.

EDIT- Actually those P4 Prescotts are insanely hot. Those stock HSF doesnt do it justice

 

[Fallengod]

Staz: Well I can definitely tell you, that 49C idle and 63C load with an opteron 148 oc'd is definitely a bit higher than usual. Probably still well within limits but, I will tell you my opteron 148, which I no longer have, was oc'd to 2.5ghz (which is pretty low) on stock volts ran at 33C idle and 41C load w/ Xp-90 so.... That was however on stock volts, I dont know what voltage you have. Of course, it could be your case or room ambient temp. Its hard to say. Like I said before, could be faulty sensors as well.