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XFX 450W Core Edition Enough for HD 6870? [34A]

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So, to keep this simple, I'm wondering if I can power a HD 6870 with this power supply, I remember reading somewhere that the HD 6870 needs 28A to run(Full System Load) and Anandtech says it uses 306W of power at full system load using furmark.

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XFX 450W Core Edition 80+ Bronze PSU. Single 12V Rail at 34A.

More about : xfx 450w core edition 6870 34a

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But if it only uses 306W of for the full system load, and the power supply can pump out 408W or power on just the 12V Rail, shouldn't it be enough?I also forgot to mention it was an 80Plus Bronze PSU.
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Power supply Expert

Its up to you but everything I can find including AMD recommends a good 500W PSU minimum, this should give you some margin for error so it should be OK but if you have not bought it yet I still recommend you get that extra 50W.

Well, I can't do that, but I can downgrade the GPU to a HD 6850 or GTX 460, and the GTX 460 recommends a PSU with 24 Amps on the +12V rail.

EDIT : and spend the extra money on a better PSU.

That is the essentially the same PSU, it has the same number of PCI-E connectors and amps on the 12V Rail, also, I'm in the UK, but thanks for the help.So, should I downgrade the GPU and spend the money on a better Mobo, or maybe a cooler to overclock the processor.
Power supply Master

yummerzzz said:
That is the essentially the same PSU, it has the same number of PCI-E connectors and amps on the 12V Rail, also, I'm in the UK, but thanks for the help.So, should I downgrade the GPU and spend the money on a better Mobo, or maybe a cooler to overclock the processor.

If I were you, no, I would not downgrade the GPU. Most people are looking to upgrade, not downgrade the GPU.

Can't you find similar deals on Corsair PSUs in the UK? XFX is also a good brand; so is Antec.

Try not to downgrade any components.

Which Corsair PSU's do you have in mind, as the CX500 is identical apart from having 1 extra floppy connector, and one less SATA connector. Also, as this will be my first time build, and will be running at 720p for a while, under a year though, and my current setup is a Athlon 64 x2 3800+ 2Ghz wth 1GB DDR2 RAM and an X1300PRO, so any of these components would be an upgrade.
Power supply Master

yummerzzz said:
............That's not really a valid reason.

These are not standardized ratings and evaluations. Therefore, the manufacturer's reputation is important. And Corsair has a solid good reputation for their PSUs, RAM.

As with all good manufacturers, occasionally a bad product, or a bad batch will slip through. In a way, this is good, because the cost of 100% good products, 100% of the time, is infinite. Zero defects -----> infinite cost.

As long as a good company has few defects (acceptable %) and a good RMA process, I have no issues.

Oh, the PSU is a Seasonic S12II, and IIRC, Seasonic is a VERY reputable PSU brand.

EDIT: I believe XFX has a good RMA process, and it does have a 5 year warranty.

But if this PSU is that much worse than the CX500, I guess I'll have to downgrade to a HD 6850.
Power supply Master

yummerzzz said:
Oh, the PSU is a Seasonic S12II, and IIRC, Seasonic is a VERY reputable PSU brand.

EDIT: I believe XFX has a good RMA process, and it does have a 5 year warranty.

But if this PSU is that much worse than the CX500, I guess I'll have to downgrade to a HD 6850.

Seasonic is fine! Good quality!
Power supply Expert

Up to you, I would find/pay the £6 extra for Corsair especially if something goes wrong and you need to return a failed part you can say you where using a power supply of the recommended no of watts. If you really can't find £6 its a shame to have to drop back to a 6850 though as well.
Power supply Master

Yes, because has plenty of power for your build.

You should choose it over the Corsair CX500 because it is more efficient and has a higher temperature rating.

Surely it is a recommendation, not a requirement. I wouldn't have thought warranty could be refused because of a 'recommendation'. And AMD's recommendations for power supplies take into account the fact that a lot of 'power supplies' on the market cannot supply what they claim.

Oh, I'm not dropping back.
I keeping the GPU AND the PSU as if this PSU couldn't handle the GPU then neither could the CX 500 as they both have the same number of Amps on the +12V, which is the GPU's power source.

I said I'd report back, and I am, I ended up getting the power supply and the HD 6870, but changed the motherboard for the Asus M5A78L-M LX, and the XFX 450W power supply power it fine, no failures in Prime 95 or in Crysis, which is the only game I have at the moment.
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