extreme cooling cards

[Neuromancer]

Borrowing Juans pot for a bit... and got about 6-8 cards to pound through that I want to vmod...

I expect I need ramsinks... or do I ? At least for VRMs? :ohcrap: I dunno...

couple 7600gts.
couple 7800gts
7900gt, 9500gt,
and maybe a 7900GS... (not two.. lost the other one)

[Kal-EL]

vrms prolly but ramsinks dont' think so. Dice or Ln2?

[Dentlord]

The ram is right next to the pot and usually is cold as hell, especially on ln2. I put them on sometimes, but have never had a problem if i didnt.

[Hondacity]

http://www.frozencpu.com/products/8453/vid-122/Scythe_VGA_Chip_Heatsink_Kit_-_23_Passive_Heatsinks_SCVCH-1000.html?tl=g40c21s226

[ocgmj]

Ram sinks only needed for air. You should ALWAYS use VRM sinks. ;)

[Neuromancer]

http://www.frozencpu.com/products/8453/vid-122/Scythe_VGA_Chip_Heatsink_Kit_-_23_Passive_Heatsinks_SCVCH-1000.html?tl=g40c21s226

thanks hc :)

[Hondacity]

i forgot to add

3m 8815/8805/8810 double sided heat transfer tapes....good to about -40C

[Neuromancer]

i forgot to add

3m 8815/8805/8810 double sided heat transfer tapes....good to about -40C

I use this sekisui #5760 (http://bestbyte.net/merchant/merchant.mvc?Screen=PROD&Product_Code=COTISK02&Category_Code=COTI&Store_Code=BB)

No clue what the temp range is on it though.

[V2-V3]

def need VRM sinks, the cold will keep the RAM cool enough, also remember GPU RAM especially GDDR3 has a habit of not liking the cold. -60c and lower in most cases

[Neuromancer]

So just cover the RAM with eraser? Or leave the tops exposed.

Once the gpu pot gets here going to have to decide if I am going to DIce it or try LN2.

[Patch]

I don't know if it's true or not, but I think RAM sinks help to WARM UP the ram on the side when under LN2 if you have some good air flow on them.

I don't understand the recommendations I see from some top guys about different types of grease on the ram chips to insulate from the cold. I think that under LN2 most of the cold comes from the cold PCB itself. When I've used eraser and left the surface of ram chips exposed, they start getting frost on them before I start to see any at the edge of the insulated pot.

[Neuromancer]

so ddr3 leave exposed and use ram sinks to help warm it.

Have not decided on what to do wit the 4890 yet whether taking it sub zero or not. Might wait on that so all the rest of the cards are ddr2/3

[Dentlord]

I froze my 4890 tonight with some decent results .... 1120/1150 in vantage for a gold, and pretty good scores in everything else (except 01 of course)

[Neuromancer]

Hmm if I went cold on this card and only got 1120 I would not be a happy camper.

I got really good 4890 (thanks Kal!!!). 1040-1080 benchable on stock cooler.

[Dentlord]

This one only went 940 on air, cold it ran 03 at 1150, had to dial it back for 05 06 and Vantage though. No mods, just software voltage control.

I seem to get much better gains freezing nvidia cards over ati?? Not sure why but so far that has been my experience

[Neuromancer]

You have real software voltage control over your card? I used riva with the volterra plugin and the 4890 CFG file. ASUS own voltage tweker did not work well and afterburner sucked. (for volts, worked great on clocks)

Also one thing I noticed on the 4890? Overclock is SOOO VRM temp related.. once you hit 90+C your done.

Repasted mine and adjusted it 3 times to get a reduction in temps. Kal can tell you I was on IM with him and was freaking out cuz first two seats were worse. He told me to calm down and try it again. I did and mad e a nice change in temps.

[Dentlord]

ABE worked great for mine.

[Neuromancer]

Mine worked intermittently and never over 1.35

[Kal-EL]

Glad that 4890 brought you joy Rich! :thumbsup: