Power Supply for a 290x crossfire

[mao_dze_dun]

Hi guys,
I need an advice on what PSU to get for a 290x crossfire setup. I got a deal for a second 290x for just 175 euro, brand new with 2 year warranty and it's an Asus with factory OC and aftermarket cooler - I just couldn't say no . However it is obvious my current 730 watt Thermaltake Smart SE is not up to the challenge (it's a pretty crappy PSU in general). I did initially want to get a Corsair RM1000 but it won't be a good fir for my case and I'd have to get rid of my bottom case fan to put it in. Alternatively, I can get a Corsair AX850 which is also gold certified and is the exact size of my current PSU which would make it the perfect fit for my case. The question - will an 850 watt gold certified power supply be enough and possibly not just barely for my system? I understand having at least a bit of headroom is recommended.
My specs are: i7 4790k, 16GB RAM (4x4GB), 2x290x (one MSI Gaming 4 and one Asus DirectCU II), 1x Samsung SSD 250GB, 2x Western Digigal 1TB HDD 7200 rpm, Asrock Z97 Extreme3 motherboard and the case has 3x120mm fans. According to newegg's calculator I need about 770 watt for that but I'd prefer some real life experience based advice.
Thank you in advance.

 

[Rogue Leader]

The EVGA 850 B2 (or G2 if you want to be fancy) will power that with no problem and room to spare. That whole setup will pull about 700 watts tops during like benchmarking or heavy heavy gaming.

 

[mao_dze_dun]

Not an option, I'm afraid. I was asking about the Corsairs specifically because I can get a deal on both models.

 

[loki1944]

Hi guys,
I need an advice on what PSU to get for a 290x crossfire setup. I got a deal for a second 290x for just 175 euro, brand new with 2 year warranty and it's an Asus with factory OC and aftermarket cooler - I just couldn't say no . However it is obvious my current 730 watt Thermaltake Smart SE is not up to the challenge (it's a pretty crappy PSU in general). I did initially want to get a Corsair RM1000 but it won't be a good fir for my case and I'd have to get rid of my bottom case fan to put it in. Alternatively, I can get a Corsair AX850 which is also gold certified and is the exact size of my current PSU which would make it the perfect fit for my case. The question - will an 850 watt gold certified power supply be enough and possibly not just barely for my system? I understand having at least a bit of headroom is recommended.
My specs are: i7 4790k, 16GB RAM (4x4GB), 2x290x (one MSI Gaming 4 and one Asus DirectCU II), 1x Samsung SSD 250GB, 2x Western Digigal 1TB HDD 7200 rpm, Asrock Z97 Extreme3 motherboard and the case has 3x120mm fans. According to newegg's calculator I need about 770 watt for that but I'd prefer some real life experience based advice.
Thank you in advance.

My 290X Crossfire/4770K/16GB RAM/Intel SSD/2TB 7200 RPM HDD/H80i rig draws 758W under max load.

 

[maddogfargo]

Not an option, I'm afraid. I was asking about the Corsairs specifically because I can get a deal on both models.

Do not cheap out on the PSU, especially with dual high current GPUs.

 

[abaday789]

I'm running a pair of R9 290Xs and an AMD FX-8350. I got my self an XFX XXX 850w PSU. Its 80+ Bronze and is a solid piece of kit Plus its one of the best value PSUs in the 850w range as well but any thing from this thread here http://www.tomshardware.co.uk/forum/id-2547993/psu-tier-list.html that is that is tier 2 and above plus 800w+ would suit you down to the ground.

 

[mao_dze_dun]

Not an option, I'm afraid. I was asking about the Corsairs specifically because I can get a deal on both models.

Do not cheap out on the PSU, especially with dual high current GPUs.

I'm not going to but still I'd prefer to be able to get a good deal. Isn't a gold certified Corsair good enough? I know squat about power supplies but I was under the impression their stuff was good.

 

[loki1944]

Not an option, I'm afraid. I was asking about the Corsairs specifically because I can get a deal on both models.

Do not cheap out on the PSU, especially with dual high current GPUs.

I'm not going to but still I'd prefer to be able to get a good deal. Isn't a gold certified Corsair good enough? I know squat about power supplies but I was under the impression their stuff was good.

I had a DOA Corsair HX 850, another HX 850 that burst into flames, and a CX 750M that outlasted both of them. So take that for what you will. Both my EVGA 1300W G2s have lasted longer than the HX850 did.