PSU 2 radeon r9 295x2 in crossfire?

Darkwarrior_ · Jun 6, 2014

I am looking for a powesupply of at least 1900 watts that can support 2 trade on r9 295x2.

I am currently considering the following:
iStar IS2000R4H1UP 2000W Also available on newegg

It can be customised to fit the needs by going into the cable customisation part, but I don't know what to enter.

Calnin · Jun 6, 2014

Maybe consider using multiple power supplies in the system. But, from my understanding, 2 r9 295s wouldn't really give that much of a benefit.

Darkwarrior_ · Jun 6, 2014

Calnin :

I thought about that, but I was not able to fully understand it, if you can suggest an easy method then I can try that.

lfkfkfkffs · Jun 6, 2014

Just get the ax1500i power supply, it is the most efficient. So the corsair power supply will be more than enough for you. If you want to see a real test of this power supply paired with these cards look at https://www.youtube.com/watch?v=6E0c3ujMBRY

Darkwarrior_ · Jun 6, 2014

lfkfkfkffs :

Acc. To PCpartpicker my estimated wattage is 1520 watts. So 1500i is not an option.

lfkfkfkffs · Jun 6, 2014

Go look at a video that shows the actual wattage used, not pcpartpciker estimated wattage,

lfkfkfkffs · Jun 6, 2014

If you still believe that the 1500w power supply from corsair isn't good enough, look at http://www.hardocp.com/article/2014/04/29/amd_radeon_r9_295x2_crossfire_video_card_review/13#.U5Fs4_ldWFU

Darkwarrior_ · Jun 6, 2014

The wattage is for my whole PC not just the cards. But thanks for the replies.

lfkfkfkffs · Jun 6, 2014

Do you think they didn't have a x79 board, and a high end processor overclocked when they did their testing? They just didn't do wattage tests just for the cards, it was 1400w for the whole system, and the corsair has a stronger 12v rail than most 1600-1700w power supplies do.

Darkwarrior_ · Jun 6, 2014

Mine is a server PC with 2 processors.

lfkfkfkffs · Jun 6, 2014

Well I would guess if you have a server you would need a enterprise grade power supply, like the one your originally posted.

Darkwarrior_ · Jun 6, 2014

Can you help me in the cable customisation part, thanks

lfkfkfkffs · Jun 6, 2014

For that I can't give you a 100% accurate answer nor could anyone else really, because you would need to call istar and talk to them about everything that you have, and what you plan on putting into it. they will also give you directions on how to measure for your cables etc... I used to work for a networking company before I became self employed. We always had someone call the maker of the power supply to get the right information.

Darkwarrior_ · Jun 6, 2014

Alright thanks

kalijaga · Jun 19, 2014

Hi DarkWarrior,

May i suggest dual PSU daisychained like what I did with my 295CF
The two 295x2 will probbaly survived on the ax1500i but for how long?
It is safer I think to have a better headroom , say two 1200W PSU : one powering just the one 295x2, the other powering the other card and the rest of the system.
I would buy the same PSU to minimize the variance in supply and only connect one card to one PSU.

Just an idea...

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PSU 2 radeon r9 295x2 in crossfire?

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