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Better Cooling for the 7800GTX - Page 17

post #321 of 416
2/2/06 at 3:59pm
Quote:
Originally Posted by Mr. K6
Hmm... that's odd. What grit sand paper did you use? I wouldn't go less than 600-grit. Also, how thick was the shim? Again, I wouldn't go thicker than 0.025". Also, how was the thermal contact of the AS5 when you put the shim on and off? Was the GPU completely covered and the excess pushed to the sides (see my pics)? I just pulled off my keyboard to take a look at my GPU and my thermal pads on the top RAM are touching the RAM and the heatsink, although they aren't as compressed as I would like them to be (something I will work on soon). Anyway, sorry to hear it didn't go so well, maybe third times a charm?
First shim I used fairly coarse sandpaper (80 grit) then kept stepping down to 400 grit. I figured the shim was just too rough, even with the AS5 to fill in the valleys.

Second shim though, though I started rough, I stepped down to 1000 grit, then used rubbing compound, metal polish, and finally, toothpaste to smooth it down. Then 'washed' it in isopropel alcohol to remove all the chemicals. That thing positively GLEAMED, even shiner and smoother than the bottom side of the heatsink. And I compared it to the original .025 thick copper sheet I started from and it was visually thinner (I don't have a micrometer). AS5-wise, I made sure the GPU was completely, but VERY thinly covered, and did the same on top of the shim. Honestly, I think I simply made the shim convex shaped because of edge sanding effects...causing only the center to be touching the heatsink and GPU.

I'm done for right now, about to go on the road a while. Also, I'm pretty smart with computers, but there's always a risk every time I crack open the laptop, screw or unscrew the bolts, pop the cover, etc. I'm just going to take a break from tinkering...maybe attack it later after I've been on the road a while.

FastCargo
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post #322 of 416
2/2/06 at 7:00pm
mr.k6 good idea on water cooling, i was thinking if i got the h-20 80 micro liquid cooling from swift tech http://www.swiftnets.com/ would the water block fit on the cpu...id take the keyboard off and cut out a bit of the besel, make an external exclosure for the unit and id make a little acrylic box to go over where i cut out..i was also thinking would the mcw55 vga waterblock fit on the 6800u. if it did i would firs try it with my 2.13 and my 6800u before i got a new cpu and a 7800....plausable..i think so
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post #323 of 416
2/2/06 at 10:49pm
*bump*
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post #324 of 416
2/2/06 at 11:04pm
actually i was also looking at this one http://www.tigerdirect.ca/applicatio...&Sku=K450-1058
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post #325 of 416
2/3/06 at 5:45am
................

I think this is going way too much.... Get a desktop and u can have lots fun in OC and playing with cooling.

The easiest way is get another lappy in next 2 years and u get all the speed....

I think lappy cooler is so far the best solution.
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post #326 of 416
2/3/06 at 8:10am
Quote:
Originally Posted by calstar Benz
................

I think this is going way too much.... Get a desktop and u can have lots fun in OC and playing with cooling.

The easiest way is get another lappy in next 2 years and u get all the speed....

I think lappy cooler is so far the best solution.
BUT MARTY, WE JUST NEED ONE MORE JIGGAWATT!!!

But yeah, even I can't really see the logic in "de-mobilizing" a laptop. If you want to supercool a P-M - get a desktop P-M board and go mad - hell, use it as an excuse to take the 2-2.26 out of your XPS and run it in the board, and pinmod something else. It'd PROBABLY be cheaper...or at least *safer*.
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post #327 of 416
2/3/06 at 11:35am
i dont think it would be cheaper cause liquid cooling is only $150 while a desktop is a whole lot more
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post #328 of 416
2/3/06 at 3:38pm
Thread Starter 
Ok, looking good guys

nkhan - I think I9KFanGUI only reports lower temps for the video card, the CPU temp read out is accurate. For FEAR, any non 4:3 resolution must be entered into the config file as posted. Soft shadows is an option available in the advanced graphics options menu, but it's off by default anyway . I'm not so sure that the shims keep temps down as much as they keep the heat away from the card and stabilze overclocks.

timmy, nkhan actually did some of these mods to his 6800Ultra and is now transferring them over to his 7800GTX, so he can help you on your 6800Ultra if you have any advanced questions

FastCargo, the chemicals might have had something to do with it. It is very difficult to remove all traces, but I think isoprophyl alcohol is the best way to do it. I think what might have done you in was the metal polish, which really get's into the metal and kills it's surface contact capabilities. Anyway, glad you had a go at it at least, but next time use the 1000-grit and wet sand it and leave it at that .

Finally, my original water cooling design had all intents and purposes of keeping the laptop mobile, because you're right, grounding a laptop because of cooling defeats the purpose of having a laptop .
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post #329 of 416
2/3/06 at 4:16pm
Quote:
Finally, my original water cooling design had all intents and purposes of keeping the laptop mobile, because you're right, grounding a laptop because of cooling defeats the purpose of having a laptop .
i get your guys points but for me its ok beacause my comp never leaves the desk so really it doesnt need to be mobile. and plus i think if i do it ill have a better chance of success at the 765 pinmod(which im ordering today)
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post #330 of 416
2/4/06 at 2:51pm
Quote:
Originally Posted by Mr. K6
FastCargo, the chemicals might have had something to do with it. It is very difficult to remove all traces, but I think isoprophyl alcohol is the best way to do it. I think what might have done you in was the metal polish, which really get's into the metal and kills it's surface contact capabilities. Anyway, glad you had a go at it at least, but next time use the 1000-grit and wet sand it and leave it at that .
I was afraid of that as far as the polish thing goes. Man, using 1000 grit only is going to take FOREVER!! Well, guess I'll do the reattack when I get home (maybe take on the road). Also, I'll sand the middle of a large sheet, to avoid the edge sanding issues.

I'd better do something. Last night, I was playing Splinter Cell: Chaos Theory at full res (1900x1200), with Shader Model 3.0. I was getting at least 30 FPS...but, the laptop was sitting on plexglas on top of a woodtop desk, with a light panel behind it (aircraft guages) and at 4000 feet pressure alititude. Played for a couple of hours (flying from Memphis to Seattle) and when I stopped, fangui showed a GPU temp of 101C max!!! Holy boiling water Batman!!! Part of it was the general heat enviroment and high pressure alt...even the CPU was showing 56C, normally never going above 50C. Damn that's hot!!

FastCargo
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post #331 of 416
2/4/06 at 5:06pm
Thread Starter 
Quote:
Originally Posted by FastCargo
I was afraid of that as far as the polish thing goes. Man, using 1000 grit only is going to take FOREVER!! Well, guess I'll do the reattack when I get home (maybe take on the road). Also, I'll sand the middle of a large sheet, to avoid the edge sanding issues.
It's mucheasier to take off most of the copper with a heavier grit, like 300 or 400 and then do a final sanding of 1000grit to smooth it out
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post #332 of 416
2/4/06 at 6:45pm
have you guys tried ordering yr copper from onlinemetals ?
http://onlinemetals.com/merchant.cfm...ep=2&sortby=od
they have a sample pack, that has a bunch of copper, with varying thicknesses.

Each pack contains a 4'' x 4'' section of:

* 10 oz.(.0135")
* 16 oz.(.0216")
* 24 oz (.032")
* 32 oz.(.050")
* 48 oz (.0647")
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post #333 of 416
2/5/06 at 2:31am
Quote:
Originally Posted by Mr. K6
It's mucheasier to take off most of the copper with a heavier grit, like 300 or 400 and then do a final sanding of 1000grit to smooth it out
Well...duh! That's what I did before...but I wonder if I was still leaving pits...

FastCargo
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post #334 of 416
2/5/06 at 2:32am
Quote:
Originally Posted by nev_neo
have you guys tried ordering yr copper from onlinemetals ?
http://onlinemetals.com/merchant.cfm...ep=2&sortby=od
they have a sample pack, that has a bunch of copper, with varying thicknesses.

Each pack contains a 4'' x 4'' section of:

* 10 oz.(.0135")
* 16 oz.(.0216")
* 24 oz (.032")
* 32 oz.(.050")
* 48 oz (.0647")
NOW you tell me....sheesh...no sanding required.... Guess I'll have to get me some. Anyone want to buy a 6" x 3" sheet of .025 copper?

FastCargo
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post #335 of 416
2/5/06 at 5:11pm
lol...sorry, havent been reading ALL of the thread, so i was under the impression that you guys knew about online metals.
I just got a lil confused as to why yall were still trying to sand the copper down ?...lol
guess I shoulda posted this earlier....sorry guys
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post #336 of 416
2/7/06 at 2:33pm
I've have my 7800go gtx up to 450/1230 and get no artifacts with ATITools and the temp is about 80° max (15 min). Doing a Pixel shader test in 3dmark05 with 4AA and 20 times, the temps grows up to 90°C and have flashing textures (I think the RAM are too hot ?)
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post #337 of 416
2/8/06 at 2:01am

Well, solved my cooling problem...sort of...

Hey guys,

After the 'boiling water' game of Chaos Theory, I decided to start putting one of my CD wallets underneath the back edge of the notebook. Elevates the XPS about 3/4 of an inch at the back (actually makes it slighter easier to type and game).
That REALLY helped my temps. Now I can play SC:CT for several hours with Shader Model 3.0 and the GPU temps never climb above 92C. I think the improved airflow and lack of heat conduction to a surface underneath the radiators really help. And because the notebook is so wide, there is no wobble.
I think I'm done fooling around for now. All my other games run just fine, SC:CT and CoR:EfBB are the big video stressors...I figure they're on a par with FEAR in terms of overall video work. Last thing I want is to burn out my CPU or GPU...

Game on and good luck!

FastCargo
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post #338 of 416
2/8/06 at 4:09pm
Thread Starter 
Quote:
Originally Posted by nev_neo
lol...sorry, havent been reading ALL of the thread, so i was under the impression that you guys knew about online metals.
I just got a lil confused as to why yall were still trying to sand the copper down ?...lol
guess I shoulda posted this earlier....sorry guys
My fault, I guess I should have stressed the fact that A)I'm at school and dont have my supply of other metals and B)Too cheap to buy more copper so I just sanded

Quote:
Originally Posted by itou
I've have my 7800go gtx up to 450/1230 and get no artifacts with ATITools and the temp is about 80° max (15 min). Doing a Pixel shader test in 3dmark05 with 4AA and 20 times, the temps grows up to 90°C and have flashing textures (I think the RAM are too hot ?)
It could also be the core due to the fact that it's a pixel shader test. Try both and see what happens. The problem is that you can independently test for the clocks on core and memory, but the heat coming from both of them when they're overclocked is sometimes enough to make one or both of them unstable, even though they were stable before.

And indeed, raising the laptop is the way to go. I keep my screw set underneath the back and my laptop is propped up about 2/3" .
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post #339 of 416
2/8/06 at 6:09pm
i have 2 gatorade lids on the back 2 feet of my 9300. it doesnt help the highest temp or anything, but it takes longer to get there with it being elevated.
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post #340 of 416
2/8/06 at 6:39pm
I took a wire cooling rack and attached some ('bout 1.5 inch) feet.. The laptop fits almost perfectly on this and it does a heck of a job.. cost about 5 dollars all together... My next goal is to attach an old desktop powersupply to the cart a keep the notebook on and suspend some fans under the cooling rack.. I pimped out this cart.. Attached speakers to the sides, a power strip on the back .. a usb battery charger and external dvd burner on the side.. If my camera was working Id give you guys some pics...
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