measuring thermal performance...

Dubb

Platinum Member
Mar 25, 2003
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Maybe some of you will find this interesting. it's kinda cool to be able to get temps by taking a picture.

system:
Asus PC-DL (w/.08v vdimm mod)
2x1.6G LV xeons @ 2.6 (13x200) (1.6v)
intel (3.06) wind tunnel HSFs
2x 512 crucial ECC pc3200
2x 36GB raptors (non-raid)
pny 5900 ultra @ quadro 3000
antec sonata w/extra 120mm fan
antec 550 eps12v PS

most of these were snapped after half an hour of 4 instances of p95. (100% cpu load) I didn't do anything as far as stressing the gfx card, I suppose if I get some more time I can look into that. I had originally planned on using this to evaluate thermal issues at different vcore voltages, maybe a Cm heatpipe or case upgrade etc, but I just don't have the time.

note that the scales are not always the same (so pay attention when trying to compare) also there's one where I forgot to set it to C instead of F. also keep in mind that this thing only reads surface temps, not core temps.

Here's the back of the case:
Back

cpus & VRM
Cpu1

Here's an interesting one...the max temp on the heatsink (inside the square)is 45 deg C...within a couple degrees of MBM temp readouts
Cpu2

shot of the back of my 5900 ultra - again, I didn't stress this, but the detail is interesting. 48 dec C, no load, while the core readings were much lower- idles at ~40 deg C
Gfx

examining the northbridge heatsink. also of note are some hot little mosfets I discovered while doing this. more on those later. the NB heatsink looks like it's doing an ok job (48 deg c)
NB

the whole mobo. again note that note that the hottest place on the whole board is that pair of un-heatsinked mosfets (just above the gfx card)
MB

closeup of those mosfets. note the high temp. 93 deg C...203 F...you could burn yourself on those things!
Mosfs

I never thought ram got all that hot...but apparently if it doesn't get any airflow it does...62 deg C on the stick that's out of reach of the fan.
Ram


with this brief little study...I need a couple mosfet heatsinks...and maybe a new case. I suppose this could also be a great way to accurately get cpu temps, but that would likely involve ripping the HSF off while running, snap a pic, then shut down asap. Not doing that with my hardware....

~dubb
 

Farmer

Diamond Member
Dec 23, 2003
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Nice pictures! What type of IR device is that? And I thought night vision scopes were expensive...
 

Dubb

Platinum Member
Mar 25, 2003
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borrowed from my father, actually. He does plastics molding and uses it to get mold temps, etc. He was given some sort of amazing deal on it through one of the companies he works with. I'm home visiting over break and he asked if I had any use for it :)
 

AWhackWhiteBoy

Golden Member
Mar 3, 2004
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yea MOSFETs can be buggers. i burnt myself pretty good one day using my finger to performe the same function as your camera :)
 

Dubb

Platinum Member
Mar 25, 2003
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Originally posted by: AWhackWhiteBoy
yea MOSFETs can be buggers. i burnt myself pretty good one day using my finger to performe the same function as your camera :)


oops, fixed