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Better Cooling for the 7800GTX - Page 9

post #161 of 416
1/19/06 at 4:55pm
I just found out that I get deltas at 470/1200, but in 3dmark06 i get no artifacts. So I will keep 470 for some gaming and revice my decision after some BF2 r&r
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post #162 of 416
1/19/06 at 5:51pm
Thread Starter 
My last 7800GTX, while it did run cool, was a horrible overclocker. The core froze in applications at 480 and above. I tried playing FEAR at 450 for awhile, but I did get artifacts here and there. I eventually found out that 435 was the best gaming overclock. This was about 10 minutes stable in ATiTool and stable in every game for hours on end. Higher clocks would crash an HDR enabled FarCry and FEAR would get artifacts every now and then.
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post #163 of 416
1/19/06 at 6:00pm
What's an artifact and whats a delta?

So I'll stick with 435, i know that's good... im just scared of a bad flash ^^. 1200 sounds good too, what are the chances that my card can bear 1250? unless i open my window .
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post #164 of 416
1/19/06 at 10:08pm
Guys, I hate to say it, but my temps with just good old AS5 match the results obtined by this rather elaborate mod. My heat sink makes very good contact with the GPU without the need for the copper shim (enough to flatten a small dab of AS5 flatter than Saran Wrap over the whole chip).

Just my 2 cents...
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post #165 of 416
1/19/06 at 10:28pm
Thread Starter 
lol! Funny that you should post that. I just installed my new 7800GTX (came in today ) and you're 100% correct! They changed the heatsink design ever so slightly, but the contact is PERFECT now. I was absolutely shocked to tell you the truth. Also, seems like I got a good overclocker too . Artifact free in ATiTool at 460/1250 for 10 minutes now . Anyway, I'm hoping to break some 3DMark05 records come a break .
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post #166 of 416
1/20/06 at 12:10am
well now that dell has worked out the bugs i guess it is time for me to get in the market for a 7800. then i can begin my domination of the southern hemispher
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post #167 of 416
1/20/06 at 12:14am
Quote:
Originally Posted by Mr. K6
lol! Funny that you should post that. I just installed my new 7800GTX (came in today ) and you're 100% correct! They changed the heatsink design ever so slightly, but the contact is PERFECT now. I was absolutely shocked to tell you the truth. Also, seems like I got a good overclocker too . Artifact free in ATiTool at 460/1250 for 10 minutes now . Anyway, I'm hoping to break some 3DMark05 records come a break .
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post #168 of 416
1/20/06 at 12:16am
Almost makes me wonder if I should call them and ask for a replacement. I still haven't gotten around to installing mine, so it hasn't been altered.

Is there a particular revision number I should query about?
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post #169 of 416
1/20/06 at 1:34am
Thread Starter 
Honestly seems like luck of the draw, as they're all in boxes and Dell just grabs them and ships them out. Just an update, the card was stable at 460/1250 PAST 30 minutes, so I stopped the test. I get artifacts after a minute at 470, so this is definitely the sweet spot. And the RAM gets artifacts at 1270 after 2 minutes, so I think it's good where it is too. I'll definitely be going for 500/1300+ clocks on a cold day though, damn this january thaw .

EDIT: Holy crap, I just noticed, that damn card gets up to 100C in FEAR . Hmmm... I'm definitely going to have to order some thin copper ASAP!
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post #170 of 416
1/20/06 at 3:23am
I'm not sure if this has been posted, but I AS5'ed my 7800GTX before I put it in, and overclocked it to 435/1150 to be safe and let the AS5 set. Well, it's been a over a couple weeks, so I just clocked it to 450/1200. Things seemed to be going fine, until I played Call of Duty 2, and after about an hour, I started getting artifacts and glitching. But, according to i9kfangui, my GPU temps never rose above 80 degrees celsius (and CPU never got above 46 degrees celsius).

Is this just a problem with the 7800GTX? No matter how cool it runs, it still will glitch eventually?

If so, can someone make me a 445/1180 flash ROM file? (the one from here's next step is 445/1150, and I heard 445/1180 was good)

-Thanks!

(EDIT: I just did a bunch of testing with ATI Tool and various overclocks, and the most I could get to was a lowly 440/1150 (which ran for 15 mins with no artifacts)... Anything higher than 440 or 1150 in any combination gave me artifacts after 2 minutes or less. That sucks major balls!)
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post #171 of 416
1/20/06 at 8:38am
yeah, those clocks will probably produce artifacts in games. turn it down a bit.
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post #172 of 416
1/20/06 at 9:38am
I'd like to say that I am really jealous, mr k. Just wouldnt every 7800 gtx get really hot if you were to clock it at 460/1250? Just my 2 cents. You going to mod it now?
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post #173 of 416
1/20/06 at 10:35am
I put mine back to 450/1200 for lower temps, less damage and some other reasons i don't know. I belive BF will go as smooth as ever anyway.
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post #174 of 416
1/20/06 at 10:54am
Quote:
Originally Posted by Master_Axe
I'd like to say that I am really jealous, mr k. Just wouldnt every 7800 gtx get really hot if you were to clock it at 460/1250? Just my 2 cents. You going to mod it now?
I Second that, so envious...

Going to Ace Hardware sometime today to check for some copper sheet, Home Depot had none.

Then comes the overvolting
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post #175 of 416
1/20/06 at 1:31pm
pls tell me how it goes . stable at 460/1250... sheesh! I'd still downclock, where do you need all the performance/ heat?

Say, dont you get errors from lesser performing transistors or something, rather than heat? Running on 100C and still stable :O
We could write a program to find those weak transistors and boycott them ^^. Just a thought :P.
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post #176 of 416
1/20/06 at 3:47pm
Thread Starter 
Yah, I seriously just lucked the hell out . This card is just unbelievable. I played FEAR for easily 45 minutes with absolutely NO glitches at 460/1250. Anyway, better cooling is definitely in order, as I still am not comfortable with 100C load temps.

And yes, the faster you run the chip the hotter it will get. The ability of the chip to run speeds in excess of specifications is based upon many factors, including quality of the silicon, where the chip was on the wafer, the other components in the card, etc. etc. None of these are really able to be determined pre-operation and are characteristic of each individual card, so overclocking ability is for the most part luck, although there are a few tricks to get a little more juice out of your card (such as cooling :thumbup).

Btw, overvolting doesn't really seem to work through BIOS flashing (at least for my original card) and it is very dangerous on such a specific operating environment, so I wouldn't recommend it.

If you're looking for sheet metal, I think 28 guage (0.0135") would work best on these new heatsinks
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post #177 of 416
1/20/06 at 4:02pm
when u guys are mentioning temps, are you referring to nvidia control panel temp or i9kfangui? i know fangui is 6C cooler, and i assume Nvidia is the correct of the two?
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post #178 of 416
1/20/06 at 4:07pm
regardless of that just curious of stock/load temps of those with AS5 on their 7800gtxs, im idling 50 right now and my 2.0GHz 760 is at 40 with AS5 are they both good? CPU has had AS5 for a couple of months so it should be cured and the GPU for about a week

Just seeing if i put enough AS5 on after i rubbed the stuff into the core and heatsink

Also on the 7800gtx heatsink having slightly different design how do u tell? Do they not have that copper rectangle that sits on the gpu or what? i like that copper plate much more though put into these nice cards heatsinks compared to old 6800s

Also its fine that i rubbed in AS5 on the entire copper part of heatsink where core touches?

*edit* Forgot to say those temps are with 445/1250
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post #179 of 416
1/20/06 at 4:07pm
Quote:
Originally Posted by stratfellow3
when u guys are mentioning temps, are you referring to nvidia control panel temp or i9kfangui? i know fangui is 6C cooler, and i assume Nvidia is the correct of the two?
The temps I post are i9kfangui +6C.

-Doc
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post #180 of 416
1/20/06 at 4:21pm
Quote:
Originally Posted by stratfellow3
regardless of that just curious of stock/load temps of those with AS5 on their 7800gtxs


I'm sitting on a veranda on a sunny, warm summer day here in Rio. My 2.0 CPU idle temp is 40C and the GPU (overclocked to 440/1150) is idling at 57C. The GPU peaks in the low 90's in Farcry, the hottest-running game I have loaded.

When I'm indoors and the AC is on, the temps are a fair bit lower.

AS5 on the GPU only. The CPU runs so cool it's not worth it. That's what the Pentium M is all about.

-Doc

EDIT: Let me add that I used a big-ass blob of AS5 because I thought there was a big gap between the heatsink and the chip, but now I know that's not the case, so I will be reapplying it correctly when I make the time. Still, my load temps are almost 25C lower than the stock cooling pad on the GPU! It must have been installed wrong.
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