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post #991 of 1570
Quote:
Originally Posted by Cozmo85 View Post

I think 180 is the absolute max. But why do you need a 1000w PSU. An 800 should be plenty even for sli 780ti.


Maybe the 180mm max is for non modulars?
I have the st850f-gs, i just got my second gtx 780 installed but i think that the 850w psu is not enough, my cards are downclocking to 500mhz
post #992 of 1570
Quote:
Originally Posted by ghostrider85 View Post

Maybe the 180mm max is for non modulars?
I have the st850f-gs, i just got my second gtx 780 installed but i think that the 850w psu is not enough, my cards are downclocking to 500mhz

Its not wattage. Anandtech only pulled 655w from dual 780tis on a 4.2ghz 6 core machine.
post #993 of 1570
Quote:
Originally Posted by ghostrider85 View Post

Maybe the 180mm max is for non modulars?
I have the st850f-gs, i just got my second gtx 780 installed but i think that the 850w psu is not enough, my cards are downclocking to 500mhz

there are 850w PSU that i'd put 3xGPU on. and there are 850w PSU that i wouldn't trust to run an APU with no vid card biggrin.gif when it comes to PSU, it's ALL about quality. wattage often means nothing considering how much wattage is actually being drawn from the wall.

a 750w is more then enough for 2 cards if you pick from this list

http://www.overclock.net/t/183810/faq-recommended-power-supplies
post #994 of 1570
Quote:
Originally Posted by psyclum View Post

there are 850w PSU that i'd put 3xGPU on. and there are 850w PSU that i wouldn't trust to run an APU with no vid card biggrin.gif when it comes to PSU, it's ALL about quality. wattage often means nothing considering how much wattage is actually being drawn from the wall.

a 750w is more then enough for 2 cards if you pick from this list

http://www.overclock.net/t/183810/faq-recommended-power-supplies

My current psu which is the st85f-gs is listed in there. My GPUs are working properly now, but the PSU is sqealing when both cards are under full load, i wonder if i should upgrade to 1000w to eliminate this coil whine.
post #995 of 1570
Quote:
Originally Posted by ghostrider85 View Post

My current psu which is the st85f-gs is listed in there. My GPUs are working properly now, but the PSU is sqealing when both cards are under full load, i wonder if i should upgrade to 1000w to eliminate this coil whine.

mining temps on your Ti's? and at what voltage?
post #996 of 1570
Quote:
Originally Posted by ghostrider85 View Post

My current psu which is the st85f-gs is listed in there. My GPUs are working properly now, but the PSU is sqealing when both cards are under full load, i wonder if i should upgrade to 1000w to eliminate this coil whine.

coil whine is more of a luck issue. you are drawing just the right amount of power to cause the coil to vibrate at its natural audible harmonic range and as a result you hear the whine. it's likely this happens only under particular operations such as mining or benchmarking since the draw from the PSU is of consistent wattage. you wouldn't hear this whine during idle or gaming because you aren't drawing the same amount of power from the PSU constantly.

with that said, the whine problem MAY not be solved by switching PSU. your current unit is a high quality PSU and will likely serve you well for at least 5 to 7 years. since different PSU uses different parts, you may get another PSU that causes the same whine at that wattage draw. this may be a problem that you want to bring to the guru's at the PSU section of the forum
http://www.overclock.net/f/31/power-supplies
however it's not a guarantee that the PSU they recommend would not cause whine. just a reduced chance of getting one that would whine. i believe the coolermaster V series has been recommended in the past for having reduced chance for whining.

with that said, if you are able to alter the power draw profile of the PSU so that it's drawing power outside of the coil's harmonic range then you wouldn't have the whine problem in the 1st place. also if the PSU is new, then you can always try for a RMA?
post #997 of 1570
Quote:
Originally Posted by ghostrider85 View Post

My current psu which is the st85f-gs is listed in there. My GPUs are working properly now, but the PSU is sqealing when both cards are under full load, i wonder if i should upgrade to 1000w to eliminate this coil whine.

I got the same PSU with you. I get coil whine on the first part of 3D Marks Demo (Ice Assault). Other than that the PSU is fine. Coil whines on the PSU aren't due to not having of power, but more or less your own luck! tongue.gif RMA it...
post #998 of 1570
oh, a question I'm sure has been asked many times:

I see a lot of people rocking the D14, which has dimensions of 160mm H x 140mm W x 158mm D. I also note that the TC14PE has dimensions of 171mm H x 140mm W x 159mm D when using the supplied 140mm fans. When using 120mm fans, the 14PE should end up being the exact same dimensions (within 1-2mm) as the D14, yet next I have seen very few (if any) people using a 14PE.

Does the 14PE simply not fit due to some obscure reason? Does anyone have any photos of a 14PE fitting?
post #999 of 1570
Just a heads up if you are thinking getting a 290(x) Tri-X card: Don't! The card itself will run much cooler than the GB Windforce and the reference designs, however due to its' size, the heat that is disposed at the back stays at the back! My motherboard temps went up by 10-20c and the case at the bottom right corner extremely hot.
post #1000 of 1570
I do agree a blower would be the best card for this case, as well as reference that have a horizontal fin array such as the ASUS DCUII or the MSI Twin Frozr.
Both allow a better exhaust from the PCI bracket as well blowing it toward the front 8mm fan.
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