The official GT300/Fermi Thread

[Marios]

yes, its possible to cool with liquid co2, so what?
nobody does it, cause it doesnt make sense...
and you certainly cant cool 7 cards sitting right next to each other in a case with liquid co2... to run folding@home... thats just beyond ridiculous!

...

I have good experience with triple SLI 8800GTX overclocked and quad SLI on air. Even though I have no experience with more cards, I find it very difficult to believe CO2 is not enough. Liquid CO2 is very cheap. I believe it makes sense to refill a liquid CO2 tank every five days when we need to run 7 overclocked cards 24/7. We are not talking about extreme overclocking 7 cards for 24/7 folding here.

[Serra]

I have good experience with triple SLI 8800GTX overclocked and quad SLI on air. Even though I have no experience with more cards, I find it very difficult to believe CO2 is not enough. Liquid CO2 is very cheap. I believe it makes sense to refill a liquid CO2 tank every five days when we need to run 7 overclocked cards 24/7. We are not talking about extreme overclocking 7 cards for 24/7 folding here.

While it is not *impossible* to do, consider:
1. The amount of heat output generated by 7 overclocked cards + CPU is quite high. This will result in a very high burnoff rate for the liquid CO2. Whether a single tank is enough for 5 days (5 days!) is debatable since it all comes down to compression and cylinder size, but it would be a fair amount of CO2 required, which brings us to;
2. Unlike the air you have used to cool your cards, the exhaust from his rig is able to render a man unconscious in a number of seconds and kill him in just a bit longer. There are ways of dealing with this as well via ducting to outdoors, but this just adds in to how elaborate the setup has to be. Again, not impossible... but given he made a single post claim on a random Internet forum, let's not give him too much credit, shall we?

[Manicdan]

While it is not *impossible* to do, consider:
1. The amount of heat output generated by 7 overclocked cards + CPU is quite high. This will result in a very high burnoff rate for the liquid CO2. Whether a single tank is enough for 5 days (5 days!) is debatable since it all comes down to compression and cylinder size, but it would be a fair amount of CO2 required, which brings us to;
2. Unlike the air you have used to cool your cards, the exhaust from his rig is able to render a man unconscious in a number of seconds and kill him in just a bit longer. There are ways of dealing with this as well via ducting to outdoors, but this just adds in to how elaborate the setup has to be. Again, not impossible... but given he made a single post claim on a random Internet forum, let's not give him too much credit, shall we?

maybe the guy was high off CO2?