Rolls my Eyes: CPU Temperature

[OracleMan]

Hi guys--

I read through of the postings here. Some OCers oc their 1700+ to 2000+ while maintaining the cpu temperature 40C normal load, heavy 45C! with Alpha 8045. What kind of case they use? what is their setup to maintain this temperature?

Reason why I roll my eyes. I have 2000+ with GA-7VRXP with Alpha 8045 w/ Suno fan. My normal load temperature is 48C, heavy load 50C. This is opening my windows, still spring you know, cold air comes in!

My setup:

Antec SX1030 with 2 80mm exhaust fans, 2 80mm intake fans, 1 ps fan.
2 PCI cards and 1 AGP for video card.
2000+ XP
1 scsi 160 seagate cheetah hd 10K rpm
1 maxtor ata133 7.2k rpm
dvd-rom


Did I do something wrong? any suggestion? when I see someone oc their 1700+ to 2000+ and maintain 40C normal use I said that's astonishing! Looking at my setup I roll my eyes and I'm not even doing any oc!
Thanks!

 

[DAPUNISHER]

If your fortunate Mikewarrior2 will be along soon to enlighten you on the topic. I will say, the accuracy of the temps being reported is highly questionable, not because of prevarication but because of the implimentation of the temp monitoring hardware. Edited because I got Mike's screen name wrong! My bad!

 

[Kuroyama]

What are your system/mobo temps?

With the AX7 HSF (40CFM fan) my 1700+ (when not overclocked) gets about 43-45 full load with system temps @ 25, so about 18-20 degrees different. Your alpha should do about the same or better.

 

[minendo]

How do you have the fan set on the Alpha? Blowing on or sucking from the heatsink? Did you use any thermal paste/compound? If so, what kind?

 

[OracleMan]

My system temperature is 36C, while my CPU is 48C normal load. I know the room temperature is cold because I open the window (boston area). (at the initial system power up, system temp is 33C and cpu is 25C....both temps steadily go up until it reaches 48C and 36C)

I have my alpha blowing into the heatsink and I use the thermal paste that came with the alpha heatsink. The fan speed is 2K rpm.

But I do notice something. The power supply is directly on top of the cpu and it is warm. Maybe I replace the power supply with the one that is cooler would that help?

 

[minendo]

Try switching the fan around on the heatsink so that it sucks from the heatsink. The alpha is designed to have a fan suck instead of blow onto it. You may also want to invest in some ASII or ASIII. Let me know the results of switching the fan around.

 

[OracleMan]

I will switch heatsink fan around tonight and what happens. I will try ASIII if there is no change after switching the fan.

 

[Mikewarrior2]

Your real problem is teh 36C System temp. YOur CPU temp is a mere 14C over that.

Work on your case cooling, and your corresponding CPU temps should drop the same.

I roll my eyes when I see people with high Case temps expecting CPU temps to be wtihin 5C of their case temps.



Mike

 

[DeathByDuke]

got a 700 Duron at 21celcius max, yes!, MAX! thats with no intake fan or outtake fan on front and back of case just CPU fan. oh yeah and GF3 Ti200 @ 250/550!

 

[WarCon]

21C Max (do you know that is 70F?). Do you really believe that a processor using ~34 watts can be just a little over a cool room temp? Especially with no case fans.

 

[Def]

You say you'll try some AS3 if other things don't help, so do you even use thermal compound now?

As others are saying, your case temps are way too toasty. I think mine are hot at 28-29C on a stock Lian-Li PC61 case.

 

[skriefal]

That Seagate Cheetah 10000 rpm SCSI hard drive my be responsible for the high case temps...

 

[DoubleL]

I have built systems using the alpha and I don't think you will see that much or anything by blowing the air off the sink, I use it blowing on the heatsink to cool it, But all systems are not the same, I to say lower your case tem and the processor will run cooler, If you do put AS3 on the heatsink the best or best for me is to put the AS3 on the heatsink and use a little, Very little on the die of the processor, I use a credit card, Then put a rubber glove on and rub what is left on the bottom of the alpha in as good as you can and then wipe off, It should stain the bottom then try and set it straight down on the processor without moving if you can, Also if you are getting your tem from the bios it can be way off from what it really is

 

[OracleMan]

I used the thermal paste that came with the heatsink. Actually I had the fan suck out of the heatsink.

Likely cause of the heat in my chassis are:

1. power supply (very warm, a little warmer than my 10K cheetah hd)
2. HD (cheetah hd 10K rpm and maxtor 7.2K rpm , I put them behind the intake fan, so the fan takes the hot air in)
3. Matrox RT2500 (is considerably very warm).

I think I am going to try to replace my power supply first, I'm going to get the dual fan power supply.
Thanks for all the inputs!

 

[DivideBYZero]

One point of note when designing your case cooling is to create negative preassure in the case, i.e., have more CFM out than in.

ALSO: I noticed that My 350W Enermax PSU was blowing hot air back into my case, bad news. This seemed to be happening due to the bottom fan blowing air out the internal grill. I blanked off the internal grill and case temps went down, as the Enermax temp control sped the fans up to compensate.

My temps 29C case 41C CPU idle, 30C Case 46C CPU Load.

The rig is in the sig.

 

[Crucial]

<< My system temperature is 36C, while my CPU is 48C normal load. I know the room temperature is cold because I open the window (boston area). (at the initial system power up, system temp is 33C and cpu is 25C....both temps steadily go up until it reaches 48C and 36C) >>



Something is seriously wrong here. You say that your system temp is 33C on initial bootup. That is 91F! Can a SCSI HD heat up a system that fast? Is this after the system has been off for awhile?

I think your temp sensors are just way off. The initial boot cpu temp is more in line with room temperature. Thats 77F, do you have any idea what the actual room temp is? When you boot up the system temp should be very close to room temperature and rise from there. I doubt it is 91deg

 

[FatMan42]

I can testify to the Pal-8045 being simply awesome. I just got one - before I had a Noisecontrol Silverado and would run the 1800+ @1606MHz 41C:idle and 50C:max. Now running the 1800+ @1673MHz @ 31C:idle and 42C:max (MBM5 - system temp 28C, EPoX 8KHA+) this is with default voltage and a Papst 34cfm quiet fan. Config is sucking out from the HS and I've used ducting to feed the hot outflow to the rear extract fan.

Case is Lian Li-PC65-USB, and I swapped the Adda fans for more 34cfm Papst units. Damn I'm impressed with this heatsink...

Now I wanna go play - see how far this chip will go. Shame I'll have to remove the heatsink to up the multiplier further. Currently 12.5 - needs L10 mods to go higher.

 

[joecool]

<< I can testify to the Pal-8045 being simply awesome. I just got one - before I had a Noisecontrol Silverado and would run the 1800+ @1606MHz 41C:idle and 50C:max. Now running the 1800+ @1673MHz @ 31C:idle and 42C:max (MBM5 - system temp 28C, EPoX 8KHA+) this is with default voltage and a Papst 34cfm quiet fan. Config is sucking out from the HS and I've used ducting to feed the hot outflow to the rear extract fan.

Case is Lian Li-PC65-USB, and I swapped the Adda fans for more 34cfm Papst units. Damn I'm impressed with this heatsink...

Now I wanna go play - see how far this chip will go. Shame I'll have to remove the heatsink to up the multiplier further. Currently 12.5 - needs L10 mods to go higher. >>



dude, i've got the same heatsink on an 1800+ running at spec speed (15??), enermax adjustable fan on it, adjusted to ~2500rpm. it's in an antec 1040 case w/an enermax psu. using digdoc5 i'm getting ~42c idle, up to 47C load. i don't see how you can possibly get 31c idle. i'm using asIII & my case temp is ~22C, also via digdoc5. CoolCPU yields cpu & system temps within a few C of digdoc5 - always higher. your temp spread seems extreme as well - most folks seem to report 5c-8c degrees temp diff. idle to load, not 11C! thats 20F!!!

 

[OracleMan]

my bad, i meant power up initially the system temp is 25c and cpu is 33c.

 

[OracleMan]

FatMan42, where do you get (buy) your duct to suck air out directly from the heatsink?

 

[DoubleL]

Well I just got another one done, A 8KHA+ with a XP1700 and a small overclock, FSB 138, With the adjustable enermax fan set to 2500 blowing on the alpha and AS3 the case is 29C and the CPU is 45C under load, Makes me wonder if you have a good contact with the die or maybe you used to much putty that came with the alpha

 

[FatMan42]

joecool... well, that's what MBM is reporting. I've not fitted a secondary thermo probe to verify this. On reboot, the BIOS info screen does agree with the temps (far as I can remember: didn't do a 'study'). Er - other details I can give you...?

- CPU fan is Papst Case Fan 80mm 8412 NGM (MBM reports ~2820rpm) - sold as 34cfm, 26dB
- Cool Shim Socket A shim - Maplins heat transfer compound on both sides
- AS3 on die/HS interface
- PSU is Enermax 431w

OracleMan - the ducting was a bit DIY. It was pre-made ducting that I cut up and glued. The original item was bought mid of last year from some Australian company on-line, can't remember who. Anyway - the duct is supplied flat and needs folding. It's 80mm square based, and designed to attach to 80mm fans. The duct has this written on it: MRP:410030230 and Fan Duct (new line) WAA 08 For K7 System (and some Chinese script).

I'll break out the digi camera at some point...