Author Topic: ATI 9800 MSF mod  (Read 8836 times)

Offline VE6JHC

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ATI 9800 MSF mod
« on: September 19, 2003, 10:33:30 PM »
I got so sick of my 9800 NP artifacting as soon as the GPU temp hit 56 C.......For reference the GPU was 48-49 C when web surfing......Run 3D2003 and the card would hit 56-60C and crap out. Given that my case temp is not that hot I examined the HSF on the 9800.....Lame is the only way to descibe it. The HSF is .465 of and inch thick and of very light weight Alum. The heatsink has two basic problems...

1)The fan mounts inside the HS and wear it mounts there are no fins. This reduces the surface area in the most important area...right over the GPU.

2) The mounting system is better than my 9700 NP as it does not use plastic push pins but rather brass pins. There is a small spring under each brass pin which provides the clamping force....There is the problem. The HSF is not attached to the GPU firmly enough and the entire HSF unit can be rocked slightly back and forth.

My solution to the problem was to toss the stock HSF and mount a stock K6 style HSF unit. I used a pair of bolts through the cards stock mounting holes and I drilled matching holes on the HS. Applied some thermal paste and torqued it down. I used some nylon washers on the back side of the card to prevent the metal bolts from shorting out the card.

Test results - Aquamark 2003 48.7C
                - 3DMark2003 49C (run right after the Aquamark)


Best of all no artifacting!!!! ;D ;D ;D ;D


I urge all ATI 9700 and 9800 users to think of doing this mod if they have artifacting troubles due to high temps.
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Offline LobbDogg

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Re:ATI 9800 MSF mod
« Reply #1 on: September 19, 2003, 11:41:32 PM »
That seems sweet, congrats on the drop in temps.  Those GPUs can get very hot very fast.
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Offline Zeus

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Re:ATI 9800 MSF mod
« Reply #2 on: September 20, 2003, 04:52:19 AM »
The shim on  the 9800 Pro/non Pro cards is actually level with the top of the GPU core - the shim on the 9700 Pro/non Pro cards is actually higher than the GPU.

I'm using a Danger Den GeForce 3 waterblock on my 9800Pro, and have left the shim in place.  On my card, the core is approximately 1/1000th of a inch higher than the shim - perfect.  I used some arctic silver ceramique, and my cards temps idle in widows are 28°C, and after intensive gaming are 34°C.

That's running stock speed of 380MHz core.

Offline LobbDogg

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Re:ATI 9800 MSF mod
« Reply #3 on: September 20, 2003, 08:54:19 AM »
I used some arctic silver ceramique, and my cards temps idle in widows are 28°C, and after intensive gaming are 34°C.

That's running stock speed of 380MHz core.

Wow  :o That is very impressive temps Zeus, I've been trying to find some easy ways to cool my 9800 pro,  thing is I can't really "mod" the card.  So what I do is just put an 80 mm case fan blowing directly onto the back of the GPU.  Seems to really help out especially when OC'n the core.  I don't know what temps the card is though.
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Offline Howdy Duty

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Re:ATI 9800 MSF mod
« Reply #4 on: September 21, 2003, 03:45:53 PM »
What's the deal with everybody listing 9800's as their video cards now?  Geez.  As soon as D-man got one, then Zeus had to get one.  Now Jeff and LobbDog have one.  Do I see a trend here?

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Offline Seeker

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Re:ATI 9800 MSF mod
« Reply #5 on: September 21, 2003, 05:33:52 PM »
I guess I can see it too...is it worth the price right now as things are changing? More less bragging rights we have all been hooked by faster stuff
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Offline VE6JHC

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Re:ATI 9800 MSF mod
« Reply #6 on: September 21, 2003, 05:46:27 PM »
The moral of this story is that Dman is a bad influence!!!!
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Offline Zeus

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Re:ATI 9800 MSF mod
« Reply #7 on: September 22, 2003, 05:22:13 AM »
Lobbdogg had one long before anybody else.  Then, yes D-man got one.  My 9700 Pro was acting up, and I RMA'd it.  In the meantime I needed a card and 9700's aren't available any more, so I snagged a 9800 Pro.

Offline Fujitsu

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Re:ATI 9800 MSF mod
« Reply #8 on: September 22, 2003, 06:09:23 AM »
well if everyone else has one, I guess I need one

Offline LobbDogg

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Re:ATI 9800 MSF mod
« Reply #9 on: September 22, 2003, 04:30:14 PM »
Thats the attitude of a true computer geek  :D  jk.  The only reason I got a 9800 pro from a 9700 is because I was able to trade my 9700 in and get a 9800 pro straight across.   Other than that I wouldn't have done it.
« Last Edit: September 22, 2003, 04:31:28 PM by LobbDogg »
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Offline Fujitsu

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Re:ATI 9800 MSF mod
« Reply #10 on: September 22, 2003, 04:49:18 PM »
anyone want to trade me a 9800 for my 9700 straight across??

Offline LobbDogg

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Re:ATI 9800 MSF mod
« Reply #11 on: September 23, 2003, 06:05:45 PM »
Consider it done.  Just kidding  :D
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Offline Fujitsu

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Re:ATI 9800 MSF mod
« Reply #12 on: September 23, 2003, 07:05:18 PM »
could one of the admin's please edit out the just kidding part of lobbdogs post?