I know this has been said before, but just wanted to re-iterate this...especially with gtx470 price deals that keep edging down toward $250. (Please don't turn this into an nvidia vs amd thread, I love amd as well and have a 5770 in another box, it's great too!)
Anyway, this is on a single loop with an i7 870 (4.4ghz) and a gtx470. (Don't make fun of me for buying the 870 *giggle* it only cost me $100--yay friends lol). Radiator is an mcr320 (ie, the lowly inexpensive $60 one). Yate loon medium fans in push/pull ($2 each during some special). CPU block is an EK supreme HF, GPU block is also an EK unit (low priced stuff, but nice imho). I know people sometimes say that a single low end triple radiator isn't enough for an i7 and high end video card, and that you should put the video card on its own loop, but meh. CPU temps aren't effected much by the video card at all, honestly (less than 5c during gpu load). Loop order is pump-->cpu-->gpu-->radiator-->pump. Thermostat says it's about 25c in here, so let's go with that for ambients.
GPU at 900mhz (remember, stock is 607mhz, so this is about a 50% overclock!). Voltage is 1.15 (I used a modded bios to uncap it). Stock voltage on my card was .9something. Before water cooling, if I didn't use a custom fan profile, the card would hit 100c during load. Scary! But now:
I haven't tried to see how high it will go, but this is a nice comfortable 24/7 clock.
Basically I just wanted to point out that water cooling really really lets gtx470 and 480 cards open up and let loose. I feel that they have a ton of potential. Keep them cool and the sky is the limit. If you wanted to try water cooling your card but were worried that you'd need to get another radiator and make a second loop, don't worry about it. Fermi isn't nearly as scary as you'd think!
Anyway, this is on a single loop with an i7 870 (4.4ghz) and a gtx470. (Don't make fun of me for buying the 870 *giggle* it only cost me $100--yay friends lol). Radiator is an mcr320 (ie, the lowly inexpensive $60 one). Yate loon medium fans in push/pull ($2 each during some special). CPU block is an EK supreme HF, GPU block is also an EK unit (low priced stuff, but nice imho). I know people sometimes say that a single low end triple radiator isn't enough for an i7 and high end video card, and that you should put the video card on its own loop, but meh. CPU temps aren't effected much by the video card at all, honestly (less than 5c during gpu load). Loop order is pump-->cpu-->gpu-->radiator-->pump. Thermostat says it's about 25c in here, so let's go with that for ambients.
GPU at 900mhz (remember, stock is 607mhz, so this is about a 50% overclock!). Voltage is 1.15 (I used a modded bios to uncap it). Stock voltage on my card was .9something. Before water cooling, if I didn't use a custom fan profile, the card would hit 100c during load. Scary! But now:
I haven't tried to see how high it will go, but this is a nice comfortable 24/7 clock.
Basically I just wanted to point out that water cooling really really lets gtx470 and 480 cards open up and let loose. I feel that they have a ton of potential. Keep them cool and the sky is the limit. If you wanted to try water cooling your card but were worried that you'd need to get another radiator and make a second loop, don't worry about it. Fermi isn't nearly as scary as you'd think!