Two R9 295x2 in CF on EK water loop crashing on AX1200i,

tankcomander

Honorable
Dec 8, 2013
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I am running a I7 5930k on a asus x99pro MB with 32gb DDR4 corsair Dominator memory and I am running 2 R9 295x2 video cards in crossfire the cards and my CPU are all water cooled with blocks from EK water cooling and my system temps are low so i know its not over heating cpu is running at 90 to 105 degrees and the video cards runn a little hotter I am running at corsair AX1200w . When im playing on BF4 or my son is on starwars bf the system will lock up and crash will have to reboot and will work for a while then some times it will work fine can it be i need a bigger PSU ? i have more case fans then the starship enterprise any ideas ? thanks for the help in advance not a real advanced computer guy
 
Solution
(1) You definitely need a more powerful PSU. You need a 1500 or 1600 watt PSU to run two of those cards. Please watch this:

OC3D TV: OverKILL3D 295X2 Crossfire Review
https://www.youtube.com/watch?v=LPZe244Ufv0

(2) Did you mean to say that your CPU temps are 90C to 105C ?!?

EVGA G2/P2/T2 1600 - Costs: USD$339.99, $379.99, and $429.99 respectively.

http://www.newegg.com/Product/Product.aspx?Item=N82E16817438033&ignorebbr=1&cm_re=evga_1600-_-17-438-033-_-Product
http://www.newegg.com/Product/Product.aspx?Item=N82E16817438037&ignorebbr=1&cm_re=evga_1600-_-17-438-037-_-Product
http://www.newegg.com/Product/Product.aspx?Item=N82E16817438041&ignorebbr=1&cm_re=evga_1600-_-17-438-041-_-Product

Corsair AX1500i
$389.99...
(1) You definitely need a more powerful PSU. You need a 1500 or 1600 watt PSU to run two of those cards. Please watch this:

OC3D TV: OverKILL3D 295X2 Crossfire Review
https://www.youtube.com/watch?v=LPZe244Ufv0

(2) Did you mean to say that your CPU temps are 90C to 105C ?!?

EVGA G2/P2/T2 1600 - Costs: USD$339.99, $379.99, and $429.99 respectively.

http://www.newegg.com/Product/Product.aspx?Item=N82E16817438033&ignorebbr=1&cm_re=evga_1600-_-17-438-033-_-Product
http://www.newegg.com/Product/Product.aspx?Item=N82E16817438037&ignorebbr=1&cm_re=evga_1600-_-17-438-037-_-Product
http://www.newegg.com/Product/Product.aspx?Item=N82E16817438041&ignorebbr=1&cm_re=evga_1600-_-17-438-041-_-Product

Corsair AX1500i
$389.99
http://www.newegg.com/Product/Product.aspx?Item=N82E16817139079&ignorebbr=1&cm_re=corsair_1500-_-17-139-079-_-Product

* Personally I would opt for the EVGA T2 1600, and I would consider placing the computer on it's own 15 or 20 amp circuit. If the price tag is too much, you should inquire if anyone has a 50% EVGA coupon, from a GPU that they've purchased in the past 14 or 30 days; can't remember how long they are good after registration.

*** power requirements for graphics cards ***
R9 295x2 CF = 1,600 watt PSU; 1,500 is fine but no less.
http://www.realhardtechx.com/index_archivos/Page362.htm
 
Solution

tankcomander

Honorable
Dec 8, 2013
25
0
10,530


 
Cool that you're looking for a 1500/1600 watt PSU. CPU temps: Whew! 90 - 100F is a different story entirely. Did you build this system yourself, or did someone assist you? EK water loop is pretty high-end stuff, at least in my mind. I'm hoping to create a system later this year with four 1080 Ti (pascal architecture) with a EVGA T2 1600 and EK components. Mine with be used for GPU rendering though, with some gaming here and there.
 
@tankcommand, just looked at the Hercules model you referenced. No sir. Your selection of two 295x2's in CrossFire, along with the rest of your build is one of the most power hungry builds on the market. You cannot cheap out here. If you do, you are risking your investment in PC hardware. You could opt for the EVGA G2 1600, but I still recommend that you watch the video in it's entirety before ordering anything. When the guy ran 1080p, he was pulling 1,250+ watts from the wall. When he ran 4K, he was pulling 1,350+ watts from the wall. Also, he is located in the UK, where they are on a 230 volt circuit. If I'm not mistaken, power supplies on those circuits are about 2 percentage points more efficient than PSU's on our 115 US volt circuits. My hope is that you don't have any other high energy usage appliances on the same circuit as your computer.