EggXpert

I have 2 of the EVGA 512-P3-N845-AR GeForce 8800GTS (G92) KO 512MB 256-bit GDDR3 PCI Express 2.0 x16 HDCP Ready SLI Supported Video Card - Retail

in sli...but cooling wise the second gpu is much hotter than the first one..by like 10c...I have the fans set the same and so on..I have a antec 900 case with extra fan on side window moving 114 cfm....it happens to actually blow the air right over both cards..the center of the fan is right in the gap of the 2 video cards..is there a pci fan that would fit between the cards? or some after market cooler that would do better?

TokenBad

Its harder to help, not knowing what mobo you're using, but the ARCTIC COOLING ACCELS1 Rev 2 VGA Cooler is one of the better cooler. If you got room, you could move the hotter card to PCIE_2, provided obviously you got the room. When you say you have them set, you mean a utility to crank the fans up, like EVGA Precision or something? Just wanna make sure, because there's an EVGA BIOS update for 8XXX series, specifically GTs and GTSs I believe, that fixes a fan sensor issue. May wanna research that one, if it hasn't been addressed. Here's another badboy to consider: ZALMAN VF1000 2 Ball VGA Cooler .

Peace, Penewah!

Sorry I have the asus m2n-sli deluxe motherboard... http://www.newegg.com/Product/Product.aspx?Item=N82E16813131013 to be exact.

TokenBad 

Penewab2007:

Its harder to help, not knowing what mobo you're using, but the ARCTIC COOLING ACCELS1 Rev 2 VGA Cooler is one of the better cooler. If you got room, you could move the hotter card to PCIE_2, provided obviously you got the room. When you say you have them set, you mean a utility to crank the fans up, like EVGA Precision or something? Just wanna make sure, because there's an EVGA BIOS update for 8XXX series, specifically GTs and GTSs I believe, that fixes a fan sensor issue. May wanna research that one, if it hasn't been addressed. Here's another badboy to consider: ZALMAN VF1000 2 Ball VGA Cooler .

Peace, Penewah!

 

actually you may not want to use 2 arctic cooling accelero's in sli because they're passive and one of the coolers will be in between the two cards and not let heat escape

 i would recommend that you use an arctic cooling accelero on the card on the outside (the lower slot on the mobo)

and if you want to spend the cash, for optimal cooling you could get the thermalright hr-03 because that can actually wrap around your card and the heatpipes transfer heat to a heatsink above your card, on the opposite side of the die.

heres a pic:

note how the entire assembly is on the back of the card so it brings heat away from the space in between the two cards in sli 

heres the thermalright site, unfortunately newegg doesnt carry the hr-03

http://www.thermalright.com/new_a_page/product_page/product_vga_cooler.html
 

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Sony PCV-RX755 (old but still runs great!)
MOBO: ASUS OEM board
CPU: 2 GHz Socket 478 Pentium 4 Northwood
RAM: 2 GB Kingston ValueRAM
GFX: EVGA Geforce 6200 AGP
HDD: Samsung Spinpoint 100 GB ATA-100

I am assuming that to do this....I would have to remove the cover on the card somehow...and remove the factory fan and stuff?  Also from what  read on the site..it says that you can mount on top and bottom of the card..couldn't I put one on the top of the one card..then the second card I could mount on the bottom?

TokenBad

yeah. you need to remove the stock cooler. just remove all the screws, take it off, and clean off the thermal paste with alcohol or something

you mean mount both to the same cooler? no you cant do that because you can only insert both graphics cards in one way, so the die would be below the card on both. you couldnt put in the card backwards to do that. what the site means is that you can orient the cooler either way on a single card.

putting two dies on one cooler is what the 9800 gx2 is based on, but that has a specially designed printed circuit board so that both dies contact a single heatsink.

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Sony PCV-RX755 (old but still runs great!)
MOBO: ASUS OEM board
CPU: 2 GHz Socket 478 Pentium 4 Northwood
RAM: 2 GB Kingston ValueRAM
GFX: EVGA Geforce 6200 AGP
HDD: Samsung Spinpoint 100 GB ATA-100

I read your OP as having concerns with one of the cards. You want to put coolers on both? what are your temps?

Are they both hot? Or is one hot? PCIE-1 is going to run hotter anyways in SLi, from what I understand (someone correct me if I'm wrong.) Because it's doing more of the work. But again, we should see if your temps are crazy high, or load high. If you're uncomfortable with the load card getting hotter, then mount that one.

I wouldnt advise mounting both cards either.

Penewah!

I don't think that the temps are overly hot..the temps on the gpu's are like um..37c on gpu1 and gpu2 is like 42..I am just thinking of later down the line and if fans die or whatever that have backup on the cards..

TokenBad

yeah those arent high temps

if the fans die, nvidia has thermal overload protection built in and your gpu clock speed will get lowered, so you'll see the difference in gameplay or whatever you're doing. you'll know, and your graphics card wont burn out, it'll just slow down. 

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Sony PCV-RX755 (old but still runs great!)
MOBO: ASUS OEM board
CPU: 2 GHz Socket 478 Pentium 4 Northwood
RAM: 2 GB Kingston ValueRAM
GFX: EVGA Geforce 6200 AGP
HDD: Samsung Spinpoint 100 GB ATA-100