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Better Cooling for the 7800GTX - Page 12

post #221 of 416
1/21/06 at 10:08pm
hey Doc. this is off topic but where is Saba off the coast of where?
and Rio is where, prob dumb question???

Also are u actually a Doctor? if so what area do u specialize in? cause i'm currently a Chem major over at JMU in VA and am planning on going to Med School, prob UVA
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post #222 of 416
1/21/06 at 11:25pm
The short version:

Saba is the smallest of the 4 dutch held islands in the Caribbean. (And it has a medical school.)

Rio de Janeiro is in Brazil.

Doc. Caliban is a Philip Jose Farmer recreation of Doc. Savage, a 30's and 40's pulp fiction hero.

-Doc
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post #223 of 416
1/22/06 at 3:23am
Quote:
Originally Posted by Mr. K6
ALL HAIL THE SHIM .
Thin layers of AS5 + shim - 90-91C load, gold
You never cease to amaze me sir. I would like to subscribe to your weekly newsletter.
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post #224 of 416
1/22/06 at 4:21am
Thread Starter 
Quote:
Originally Posted by Doc.Caliban
How is Farcry with HDR in comparison to fear for load testing? With HDR enabled and running at 1920x1200, I peak at around 93C.

-Doc
I've found that it isn't as hot as FEAR, maybe 5-8C or so less. This calibration is taken from my old video card where far cry w/ HDR would play at ~77C and FEAR would play at ~84C. But that very well could because it's an older game. Serious Sam 2 with HDR heats up the card to FEAR levels. Also, this actually is a better stress test than FEAR, as I found artifacts at 460 core with this. I think I might drop the card down to 450 to be safe. Man I wish I could get this thing to run cooler.
Quote:
Originally Posted by uuwuu
You never cease to amaze me sir. I would like to subscribe to your weekly newsletter.
thanks, I guess you can consider this as it
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post #225 of 416
1/22/06 at 9:36am
Hmmm, 90-91 fangui or NVIDIA? Nvidia is my guess?

So you put a thin thin layer of as5 on core, rotate the copper shim (As thin as it gets?), clean off the excess, leaving on the shim? Then you put as5 on the top of the shim (it is now snadwiched by as5 ^^), and put the heatsink on it. How you rotated it, i don't know (screws blocking?), or did you just rotate a *little*. Then you cleaned off excess again. To clean off excess, did you take the HS off again? thx,

Franz
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post #226 of 416
1/22/06 at 3:11pm
Thread Starter 
Quote:
Originally Posted by Master_Axe
Hmmm, 90-91 fangui or NVIDIA? Nvidia is my guess?
FanGUI actually . nVidia doesn't have a temp history, so it's impossible to get accurate temps from it. The minute you alt tab out to see temps, they'll drop 6C anyway just because the card isn't under load. But I guess it has been determined that FanGUI reports 5C too low? So add 5C to that.


Quote:
Originally Posted by Master_Axe
So you put a thin thin layer of as5 on core, rotate the copper shim (As thin as it gets?), clean off the excess, leaving on the shim? Then you put as5 on the top of the shim (it is now snadwiched by as5 ^^), and put the heatsink on it. How you rotated it, i don't know (screws blocking?), or did you just rotate a *little*. Then you cleaned off excess again. To clean off excess, did you take the HS off again? thx,

Franz
There's no cleaning off the excess. The technique involves putting on a very thin layer on the core, then pressing down on it with the shim while gently rotating a few degrees back and forth to spread out the AS5. There should be no "excess" pushing out of the sides, if there is, you applied way too much. The AS5 that gets pushed out to the sides should be minimal if the AS5 was applied properly. After the AS5 is applied and the shim is on the core, I run some AS5 into the heatsink, then I apply another layer to the top of the shim. Afterwards, I put heatsink on the core with the back plate off so that I can press it down all the way and rotate a bit. I then put the backplate in place and screw the assembly together. I have noticed that this card, on average, idles about 2C higher than my other card. I dont know if it's simply because the card runs hotter or because the heatsink isn't of as good design (it's made my some A company, like Ares or something, as opposed to my originalheatsink that was made by forcecon). In either case, I'm not going to lose sleep over it, the card runs well and I cannot ask for anymore .
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post #227 of 416
1/22/06 at 3:16pm
Quote:
Originally Posted by Mr. K6
But I guess it has been determined that FanGUI reports 5C too low? So add 5C to that.
My understanding is that it's 6C low.

-Doc
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post #228 of 416
1/22/06 at 3:53pm
it is, and you can both check and get a log with rivatuner
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post #229 of 416
1/22/06 at 4:28pm

Great Job

Mr K6. Good job. I've just gotten all the stuff. I'll be adding 5 shims. Like I said, I'll just rip the 5 shims of off the 6800U card that I modded 6 months ago. I'll put some pics up today as I open up the old card with dimensions of the SHIMS (3 copper, 2 sterling silver) and assuming the form fit of the 6800U and 7800 are the same, the modding should be straightforward (for me at least as I have the shims).

Btw, the Max CPU/GPU temps (I ever got) on the modded 6800U was 57/91 (after 45min of RTHDRIBL). The low CPU temps is prob because I AS5ed (after removed the Aluminum foil from dell) the cpu at the same time I did the 6800U mod.

Just a little update:

I've currently installed un-modded 7800GTX (with the CPU still AS5ed) and ran some tests (to make sure the card is working).

As a STRESS TEST, I ran 3DMark06 at 30 cycles (approx 37minutes) set at 1920 x 1200, 4x AA but using only 3 tests (PIXEL SHADER, SHADER PARTICLES SM 3.0, and PERLIN NOISE SM3.0); I believe that 20mins of pixel shader alone matches running FEAR (with I don't own). RESULTS: MAX CPU/GPU was at 62/104 using Fangui (The version of Fangui I have is modded and shows the MAX CPU/GPU temps).

I'm assuming the Heat output of the 6800 is the same as the 7800 I got 91 as the high on the modded 6800U (just like K6 did after modding the 7800)

Let's see how things go.
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post #230 of 416
1/22/06 at 5:09pm
You bought the full version of 3dmark06?
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post #231 of 416
1/22/06 at 5:29pm
sterling silver shims, now thats classy!
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post #232 of 416
1/22/06 at 5:38pm
Thread Starter 
Quote:
Originally Posted by nkhan
Mr K6. Good job. I've just gotten all the stuff. I'll be adding 5 shims. Like I said, I'll just rip the 5 shims of off the 6800U card that I modded 6 months ago. I'll put some pics up today as I open up the old card with dimensions of the SHIMS (3 copper, 2 sterling silver) and assuming the form fit of the 6800U and 7800 are the same, the modding should be straightforward (for me at least as I have the shims).

Btw, the Max CPU/GPU temps (I ever got) on the modded 6800U was 57/91 (after 45min of RTHDRIBL). The low CPU temps is prob because I AS5ed (after removed the Aluminum foil from dell) the cpu at the same time I did the 6800U mod.

Just a little update:

I've currently installed un-modded 7800GTX (with the CPU still AS5ed) and ran some tests (to make sure the card is working).

As a STRESS TEST, I ran 3DMark06 at 30 cycles (approx 37minutes) set at 1920 x 1200, 4x AA but using only 3 tests (PIXEL SHADER, SHADER PARTICLES SM 3.0, and PERLIN NOISE SM3.0); I believe that 20mins of pixel shader alone matches running FEAR (with I don't own). RESULTS: MAX CPU/GPU was at 62/104 using Fangui (The version of Fangui I have is modded and shows the MAX CPU/GPU temps).

I'm assuming the Heat output of the 6800 is the same as the 7800 I got 91 as the high on the modded 6800U (just like K6 did after modding the 7800)

Let's see how things go.
Looking forward to it

Just as an update, it seems my card is not stable at 460/1250. As funny as it is, Serious Sam2 crashes the card at those clocks (as in, screen locks up and is corrupted, as well as getting artifacts beforehand). Anyway, I've lowered the clocks to 450/1250 and all is good. It's surprising how much lower temps are with this as well. Right now it only loads at 87C or so in FEAR as opposed to the 91C before (using FanGUI).
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post #233 of 416
1/22/06 at 5:40pm
whats a shim? im kinda confused about what is going on here.
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post #234 of 416
1/22/06 at 6:14pm
pwnd, you aint that lucky afterall (me, who gets artifacts at 435/1150, might 'downclock' to 430/1250)
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post #235 of 416
1/22/06 at 8:19pm
Thread Starter 
hmm... nvm. It seems Serious Sam 2 doesnt like the fact that I changed voltages. I flashed back to 460/1250 with stock voltages on all three modes and BAM! It works. I'll have to muck around with the settings and see what works.
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post #236 of 416
1/22/06 at 8:56pm
Quote:
Originally Posted by drizek
whats a shim? im kinda confused about what is going on here.
A "shim" is a thin metal plate that you place between the GPU and heatsink to create more pressure between the contact surfaces.

-Doc
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post #237 of 416
1/22/06 at 9:00pm
Quote:
Originally Posted by Doc.Caliban
A "shim" is a thin metal plate that you place between the GPU and heatsink to create more pressure between the contact surfaces.

-Doc
Of course, back in the early Socket A/Socket 370 days, a shim fit AROUND the core, here it's sitting on top.

I still don't know about shimming. If I put one on I'd be wearing surgical gloves while I did because I'd worry about skin contact on the metal warping or coloring it over time.
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post #238 of 416
1/22/06 at 9:07pm
Quote:
Originally Posted by destruya
Of course, back in the early Socket A/Socket 370 days, a shim fit AROUND the core, here it's sitting on top.

I still don't know about shimming. If I put one on I'd be wearing surgical gloves while I did because I'd worry about skin contact on the metal warping or coloring it over time.
I'm still planing on contacting someone at MS that I know who has good contacts at the GPU companies. (She did WHQL testing for years.) I want to get info from nVidia on the actual specs of the GPU/heatsink fit, including pressure, for the laptop GTX.
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post #239 of 416
1/22/06 at 9:11pm
Thread Starter 
Quote:
Originally Posted by destruya
I still don't know about shimming. If I put one on I'd be wearing surgical gloves while I did because I'd worry about skin contact on the metal warping or coloring it over time.
One of the good things about the card running at 90C load temps is that you dont have to worry about stuff like that, it will burn it right off .
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post #240 of 416
1/22/06 at 9:15pm
Quote:
Originally Posted by Mr. K6
One of the good things about the card running at 90C load temps is that you dont have to worry about stuff like that, it will burn it right off .

I don't know, the AS5 people get really anal about even microscopic contamination effecting the cooling properties of AS5.
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