Still having Problems with 8800GTX's

[Geordie56]

I have installed a second hard drive to my pc, installed XP32 instead of vista, all the latest drivers etc.. however COD4 and crysis are still crashing, anyone got any ideas at all ? thanks.


Asus Striker Motherboard
OCZ 6400 Vista Gold Dual Channel Memory
x2 8800GTX OC Water Cooled GPU's
1000 Watt Cooler Master PSU
250GB Sata Hard Drive
x2 NEC R/W DVD Drives
6850 Extreme CPU
Aquaero LCD
AquaStream and Eheim 1048 pump
Evo 3 Fan Radiator
8mm Hose with Quick Connect Couplings, cooling CPU, Voltage Regs, North and SouthBridge and GPU's
Vista 64

[BudoBob]

What temperatures are the components and water running at?

[LSG501]

I'd have to go with stability testing to find out what the problem is.
Could be temps or even ram, what sort of errors are you getting.

[Fat Jez]

Are you overclocking at all? I'd say that with everything you are trying to cool on that one loop, you are overloading the radiator and it can't cope. I know Marci who works with the Thermochill radiators reckoned that a Q6600 and 2 GTX's without any over clocking would be pushing it for a PA120.3 radiator (3 120mm fans) and he wasn't including cooling anything else (including the vregs, which get extremely hot on an overclocked machine).

Cheers,
Stephen

[Geordie56]

I have checked my temps with NVIDIA Monitor and they show 63 at idle and 70-73 at full load . This isnt good for water cooling surely? Could the thin pipe size im using be a problem, should i upgrade and if so, to what size? I was goin off the temps on my Aquaero but this musnt be very accurate as they were showing 43 on full load. The water temp on my aquaero display shows 37 though the sensor is on the outside of the pipe , how accurate is this? One last thing sorry to go on ive eventually sorted out the gameplay and got crysis working but after 15 - 20 mins it starts to flash in blocky effect could this be the temp is rising? Thanks guys. P.s LSG the errors i am getting are as described here, blocky effect when been playing crysis for about 15 - 20 mins. And im not overclocking.

Sorry to go on but if you think it is temps, what would be my best way around this now without spending a lot more, as i have already spent a fortune?

[Fat Jez]

I reckon you are dumping more heat into that system than it can cope with. Your water temp should really be within 10°C of ambient, 15°C at a push and that's measured directly in the water, not on the outside of the tubing. I reckon you could add maybe another 10°C onto the temp your sensor is showing, so you are reading about 25°C about ambient - way too high.

Cheers,
Stephen

[Geordie56]

What would you reccomend doing to solve this?

[Fat Jez]

You could either create a second loop and cool the graphics cards with that or alternatively, only cool CPU and GPU's.

Cheers,
Stephen

[TimEG]

I have a friend with a new PC who has purchased two 8800gt's. He's having exactly the same issues as you, almost exactly but the fact he's running GT's. One thing we came up with was that one card appears to be running at 666MHz, the other at 660MHz. Could this be enough to stop SLI kicking in and if so why would one be set to higher than the other?

Geordie: Are you (or have you ever in the past) running ntune or even installed it? Apparently that can mess clock speeds up. Just a guess?

[Geordie56]

Im going to change my motherboards aswell, dunno if youve read my latest problem on the forum, any ideas on motherboards?