2x HD7870 and FX8350 OC'ed to 4.7GHz 850W Enough?

[diamondmines]

Here is my friend's system:

AMD FX X8 8350
MSI 990FXA-GD80 AM3+
XFX HD7870
XFX HD7870
CORSAIR CARBIDE 200R MidT ATX
COOLER MASTER RS-850 SILENT PRO M 80PLUS 850W
GSKILL 16GB (2x8GB) RipjawsX DDR3 1866MHz CL10 1,5V
ASUS 21.5" VS228H
SEAGATE 3.5" 2TB Barracuda Sata 3.0 64MB Cache 7200Rpm
CORSAIR HYDRO SERISI™ H80I
OCZ 128GB Vertex 4


The system will be overclocked to 4.7GHz. Speedstep will be used and downclock the CPU when idle. My question is would the 850W + 80 Plus be enough for 2x HD7870 and the overclocked system at full load?

Thanks.

[kalniel]

A good 850W supply would be plenty. I wouldn't go for a cooler master unit in general though, unless you have specific reviews showing that model is something good.

[diamondmines]

I heard that before but I want a modular one. The others cost more. Would it really matter, it's 80 plus after all? I've been using Cooler Master all my life and no problems had. If I could find Antec, XFX or Seasonic, I would go for them, but in my country, they are really rare. And like %30 more for the cost.

[CAT-THE-FIFTH]

It seems to get a good review:

http://www.hardwaresecrets.com/article/810

[kalniel]

I heard that before but I want a modular one. The others cost more. Would it really matter, it's 80 plus after all? I've been using Cooler Master all my life and no problems had. If I could find Antec, XFX or Seasonic, I would go for them, but in my country, they are really rare. And like %30 more for the cost.

80 plus means nothing at all relevant to quality, but if someone has checked it out as per Cat's review, then it should be fine.

[diamondmines]

Thanks kalniel.

[D1DM]

Well what other units do you have available?

[diamondmines]

Well what other units do you have available?

XIGMATEK NRP-MC SERİSİ 80PLUS 850W PSU:

http://www.vatanbilgisayar.com/guc-k...PSU&qs=|145=85

[D1DM]

Is this a better site?
http://www.teknobiyotik.com/donanim/...er-supply.html

Or this?
http://www.eksenbilgisayar.com/KMDef...3&psz=50&rpg=2

It looks to me like they have some units cheaper, but I don't speak/read that language, so don't know.

IMO it might be more worthwhile going for a really good 750W PSU vs a medium 850W PSU (which the Cooler Master Silent Pro M850 is). For example the Seasonic X-750 or the Corsair HX750.

[CAT-THE-FIFTH]

The CM got the gold award from Hardware Secrets and they are meant to be one of the best PSU review sites too.

[D1DM]

So you disagree that a unit like the Seasonic X-750 (SS-750KM) or the Corsair HX750 Gold (CP-9020031 / 75-001218) would be better?