Overclock.net › Forums › Cooling › Water Cooling › Watercooling help on AMD 7990
New Posts  All Forums:Forum Nav:

Watercooling help on AMD 7990 - Page 2

post #11 of 65
Quote:
Originally Posted by Joa3d43 View Post

...yes - currently, up to 1240 / 1680 for 4x GPUs


oooh is it making much difference ?

did you use a guide or just crank them up ?thumb.gif
post #12 of 65
I just finished water cooling my HD 7990 and CPU (I5-3570K) this weekend.

I used the following:

EK - FC7990 SE - Acetal
EK - Supremacy Clean CSQ - Acetal
Alphacool NexXxoS UT60 Full Copper 120mm
EK - CoolStream RAD XTC (280)
Alphacool VPP655 Single Edition (Laing D5)
XSPC Laing D5 Reservoir Top
16/10 mm tube

And assorted fittings and water.

I am using 2 Noctua NF-A14 PWM 140mm fans pushing through the 280mm rad and 2 Corsair SP120 push/pull on the 120mm.

They're in a serial loop as follows:

Pump
CPU
120mm rad
GPU
280mm rad
Reservoir

With the CPU overclocked to 4.1Ghz (nothing fancy) I am getting 33 C idle temps on both CPU and GPU and and 47 C on the GPU under load (Skyrim, ultra settings, 3240x1920) after 6 hours. I cant remember the CPU temp, but it isnt anything drastic. Well worth the investment just to get rid of the annoying fans on the HD 7990 (XFX reference model).
post #13 of 65
Quote:
Originally Posted by Joa3d43 View Post

...yes - currently, up to 1240 / 1680 for 4x GPUs


may i ask what voltages you are using ?
post #14 of 65
Quote:
Originally Posted by Zoroastrian View Post

may i ask what voltages you are using ?

...depends (BIOS switch)...1.3v via MSI AB for normal use, gaming etc (good for about 1220) and 1.35v on 2nd BIOS for benching etc
post #15 of 65
sorry mate im just learning all this stuff.
Let me get this straight you are ocing your watercooled 7990 with MSI AB

and for gaming you are using 1.3 V to acheive a 300MHZ on the GPU clock speed from stock ? and is that 300 on each GPU ?

you are not ocing the Memory clock ?
post #16 of 65
Quote:
Originally Posted by Zoroastrian View Post

sorry mate im just learning all this stuff.
Let me get this straight you are ocing your watercooled 7990 with MSI AB

and for gaming you are using 1.3 V to acheive a 300MHZ on the GPU clock speed from stock ? and is that 300 on each GPU ?

you are not ocing the Memory clock ?

no problem smile.gif ...BIOS#1 is stock...even with no extra voltage via MSI AB, it will clock to about 1140MHz, but with MSI AB (and its 1.3v override) it will get to about 1220 & oc'ed memory (still stock voltage on the memory) of up to 1680

...BIOS#2 is 'custom', taking basically any voltage I want to give it for the GPU (within reason), though I have that at 1.35v which is not a problem with the heavy water cooling...yielding about 1240 to 1250 MHz, depending on app...memory as above at up to 1680
post #17 of 65
sweet thanks mate.
Im running a watercooled 7990 and a Vapor X 6gb 7970 together.

I actually acheived a nice 1150 on each GPU last night.
SO i will ramp it up tonight.

I just hope the Vapor X can handle it as it was reaching 72 C

Incidently do you know what is a safe temp ?
post #18 of 65
Quote:
Originally Posted by Zoroastrian View Post

sweet thanks mate.
Im running a watercooled 7990 and a Vapor X 6gb 7970 together.

I actually acheived a nice 1150 on each GPU last night.
SO i will ramp it up tonight.

I just hope the Vapor X can handle it as it was reaching 72 C

Incidently do you know what is a safe temp ?

..well the problem is obviously not your w-c 7990 but the air-cooled 7970 (a nice card in its own right!). I'd be getting a bit nervous if it would go consistently into the 80c range though others may differ and tell you that up to 85c is fine

EDIT: Btw, I realize we may be a bit off-topic re original OP question, but if you have a spare 120mm or so fan laying around, pointing that at the back-plate of the 7990 (perhaps in conjunction w/7970) might get a bit of extra and stable VRAM out of it
Edited by Joa3d43 - 10/8/13 at 7:46pm
post #19 of 65
well i have not seen the 7970 go over 72 C i have a couple of extra fans on him already.

I actually have him in the primary slot on the mother board and the 7990 in the secondary slot.
Im hoping im not losing out by doing that ! i have been told that because they are special powered PCIe slots that there is no disadvantage in putting the lesser card in the top slot.

I only put it there because my water loop looks much better with the 7990 lower down on the mobo.
post #20 of 65
I think the HD 7970 and subsequently the HD 7990 can both go to about 98 C before the automatic cooldown mechanisms come into play on those chips. My HD 7990 reached 102 C in a session, before I watercooled it, so I know that's definitely possible without torching it.
New Posts  All Forums:Forum Nav:
  Return Home
  Back to Forum: Water Cooling
Overclock.net › Forums › Cooling › Water Cooling › Watercooling help on AMD 7990