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Crossfire XFX HD 6870 Dual Fans and my PSU.

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March 28, 2012 3:34:53 PM

Hey!

I am planning on upgrading my gaming PC that is now outdating and having trouble with running games etc.

I was wondering if some tech genius on here can tell me if my PSU will be suitable and or able to run 2 XFX HD 6870's With the dual fan cooler, each of these cards requires 2 6-pin power connectors, which i am not sure if i have them as i haven't had to open my PC for a few months now except from cleaing my dust filters, anyway,

The upgrade contains these components (I can provide links if needed, had to post this thread quickly due to work and school.)

CPU : AMD Phenom II X6 1055T (£117.40)
RAM : 16GB Mushkin Blackline 1.5v (£63.59) (Also can quad channel memory work with 990Fx Motherboards and my processor?)
GPU(s) : 2 XFX Radeon HD 6870s Dual Fan Edition 1GB (£239.54)
Case : CM Storm Enforcer (1 x 200mm, 1 x 120mm fan)
HDD : Haven't decided on which HDD to get but around 1TB.
Motherboard : ASUS Sabertooth 990Fx
PSU : Cooler Master GX650 80+ Bronze (If this really can't handle my upgrade i guess i'll need to upgrade, i have a good PSU if i need to but i really don't have the money, XFX 750W Black edition Gold PSU)
Others : 1 Disk Drive (DVD Rewrite/read.), 3 USB Devices

Thanks for any help i recieve from you guys :D 
March 28, 2012 4:02:17 PM

That's probably in the realms of 550W so I would do exactly what you have done and gone with a 650W.
a c 143 U Graphics card
March 28, 2012 7:09:32 PM

First of all a 650W Quality branded one is very sufficient for your rig, but the CM GX 650W is not good for CFX or SLI it has some bad reviews, you can check that here
http://www.techpowerup.com/reviews/CoolerMaster/GX650W_...

So you need to swap that PSU for the one you mentioned or any PSU from Antec or Corsair.
Related resources
a c 175 U Graphics card
March 28, 2012 7:20:23 PM

I agree with ilysaml. HardOCP summarized that CM PSU as a "polished turd in a box." I would not trust it. The XFX PSU is high quality (Seasonic-built), and should provide years of trouble-free use.
March 29, 2012 3:06:17 PM

Thanks for the replys guys :D 

Anyway, would this PSU even hold up for like 3 months with these cards?

I am planning on buying the XFX one shown in the upgrade list but i will have to wait for about 3 months before that.

There is also a final option of buying a 7850 or 7870 instead of 2 6870's, anyone got an idea of what i should get?

Also seasonic is awesome, my brother has their X-850 :) 

Wish i had the money for one of those D:
a c 143 U Graphics card
March 29, 2012 3:10:23 PM

2 HD 6870s would give you more performance than a single HD 7870, but you might have issues with CF scaling or driver problems. So i suggest a one powerful single GPU, have you considered the new GTX 680?
a b U Graphics card
March 29, 2012 3:26:25 PM

PCMau5 said:


Anyway, would this PSU even hold up for like 3 months with these cards?

Which one is it an E3 or a D3 ?
Coolermaster changed oems in the 550/650/750 watt units, from Seventeam ( E3 ) to Enhance ( D3 )
Enhance originally provided the internals for the 450 watt model, the only GX to receive a favorable review
March 30, 2012 2:14:28 PM

delluser1 said:
Which one is it an E3 or a D3 ?
Coolermaster changed oems in the 550/650/750 watt units, from Seventeam ( E3 ) to Enhance ( D3 )
Enhance originally provided the internals for the 450 watt model, the only GX to receive a favorable review


Um, how would i know what one?

I bought my case and PSU in a bundle, so i do not have the original box :( 

And i have thought about the GTX 680 but that is way out of my budget for a video card unfortunately.
a b U Graphics card
March 30, 2012 10:07:45 PM

PCMau5 said:
Um, how would i know what one?

Look at the model designation on the label

GX 650W RS650-ACAAD3
or
GX 650W RS650-ACAAE3
a c 143 U Graphics card
March 30, 2012 11:53:13 PM

The GX series are creepy in general, Cooler Master Silent Pro series are one of the bests.
a c 175 U Graphics card
March 31, 2012 12:23:34 AM

Not merely over poor quality, CM has earned a place on my personal "Do Not Buy" list for the corporate dishonesty that allows it to still place liar labels on some of its PSUs, or claim some of them have protections that are missing. These are facts, not opinions; read some of the reviews at HardwareSecrets.
!