Crossfiriing AMD R9 270's OC'ed

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dragonwolf8504

dragonwolf8504

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I currently have this gpu:

http://www.amazon.com/gp/product/B00GWSYVUY/ref=oh_details_o03_s00_i04?ie=UTF8&psc=1

I was looking at getting another to crossfire.

Here is my psu :
http://www.amazon.com/gp/product/B00ALYOPSS/ref=oh_details_o03_s00_i02?ie=UTF8&psc=1

It's the 600W one.

Would I be able to crossfire 2 of these cards?

Thanks!

Edit: I forgot to put the rest of my specs in:

AMD FX-6300 (Stock clock)
16GB DDR3
2x 7,200 RPM HDD's
4x 120MM Fans
3x 140MM Fans
DVD Burner
CoolerMaster 212 Evo Cpu cooler



All housed in a Phantom 410 Mid-Tower case
 
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clutchc

clutchc

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Sorry, I meant 2 x 6/8 pin PCIe power cables, not 2 x 6 pin. Either way, I'm pretty sure the card will not work unless it sees +12V at both 6 pin headers. You can test this by unplugging one of your existing 6/8 pin cables and trying it.

However, your MB is good for dual cards. I just wanted to make sure it was at least x8,x8 lane when both PCIe X16 slots were populated. Some boards have the 2nd slot at only x4 lanes. Those are not good for CF or SLI setups.

Each R9-270 is a 150W card when loaded. That will require at least 12.5 amps from the +12V rail PER CARD. If this is your PSU: http://www.newegg.com/Product/Product.aspx?Item=N82E16817139048
...it has a 46A/552W +12V rail. Having an 80% efficiency, that will be pushing it. Plus your processor's 95W load (at stock). You would be better to upgrade to 700W or better with 4 x 6/8 pin PCIe connectors. Generally, if a PSU doesn't have enough 6/8 pin headers for both cards, it isn't intended on that kind of service.

If you decide to give it a try anyway, grab a pair of these if testing your card shows won't start with just one header powered: http://www.newegg.com/Product/Product.aspx?Item=N82E16812200935&cm_re=6_pin_splitters-_-12-200-935-_-Product
 
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RobCrezz

RobCrezz

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Thats now how PSU efficency works. You still get the full 600w, it just ends up drawing more from the power outlet. His total load will probably only be around 400w-450w.

That PSU should be fine, you will need to use molex to PCI-e adaptors and have all the pcie power plugged in.
 
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clutchc

clutchc

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Of course that's how it works. But that was not the point I was trying to make. Running your PSU outside of its efficiency rating is not a wise thing to do. And the CX line of Corsairs is not the best of PSUs. It is 3rd tier and is reported to have poor capacitors. But it's up to the OP.
 
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RobCrezz

RobCrezz

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It really isnt.. I still dont think you understand. You wouldnt be running it "out of its efficiency range".

Yeah its 3rd Tier, which is classed as totally fine, although not the best. JonnyGuru gave the CX430 a good rating when he reviewed it. Ive used plenty of CX PSUs, no issues - There is a huge gap between the Corsair CX series and bad PSUs.
 
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clutchc

clutchc

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I don't think you are understanding what I was telling the OP. I told him if he felt like using it, get some 6 pin splitters and try the 2nd card. (or yes, the Molex adapters). You apparently have a different opinion of PSU size than I do. That's fine. To each his own. Undersized will work, but it's not my recommendation. That's all I was telling him.
 
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