XFX Radeon R9 280X Double Dissipation VS MSI R9 270X

MostWantedSoulRider · Jul 18, 2014

Finally, I've got some money to upgrade my current graphics card from 270x to 280x. Will there be any drastic changes if I upgrade it to XFX Radeon R9 280X Double Dissipation 3GB VRAM?

ksham · Jul 18, 2014

Yes. The R9 280X is significantly faster than a R9 270X.

MostWantedSoulRider · Jul 18, 2014

ksham :

Yes, I concur. But what about the brand (XFX)?

ksham · Jul 18, 2014

They're okay. Not much different from MSI's Twin Frozr.

MostWantedSoulRider · Jul 18, 2014

ksham :

Oh okay, then. Thanks your for quick help. And one more thing, I'm using Cooler Master GX II 550W PSU. Can I continue with the same PSU?

ksham · Jul 18, 2014

I would strongly advice that you replace it. That power supply is close to the bottom of the list in terms of build quality. Replace it with a Seasonic, XFX, Antec, OCZ, or Corsair (TX / HX).

550W is fine for a R9 280X. Keep in mind that it's not the wattage that is important, but the build quality and the total ampere rating on the +12V rail.

MostWantedSoulRider · Jul 18, 2014

How to find the ampere rating on +12V rail? I have to admit that I know nothing about this. All I know is this PSU (CM GXII 550w) is 80 Plus Bronze Certified. Does that imply anything?

Update: I found a label on the PSU. I think its 44A for +12V rail.

ksham · Jul 18, 2014

MostWantedSoulRider :

The label on the power supply tells you. If you are buying online, it should be listed.

MostWantedSoulRider :

It implies very little. 80+ certification measures the power supply's efficiency rating at converting AC to DC. For an 80+ Bronze power supply at 50% load, it has an efficiency rating of 85%. This means that during the conversion from AC to DC, 15% of that power is lost. So if your system requires 500W at 50% load, the power supply needs to pull 589W from the wall.

80+ certification does not determine the power supply's build quality or performance. It is possible to have good conversion rating while being built with cheap capacitors and under-performing. There is no rule that says the power supply has to be able to handle heavy load well to be 80+ certified. So you can be gaming and you are running on heavy load and the power supply can't handle it and causes your system to crash.

MostWantedSoulRider · Jul 18, 2014

ksham :

MostWantedSoulRider :

The label on the power supply tells you. If you are buying online, it should be listed.

MostWantedSoulRider :

It implies very little. 80+ certification measures the power supply's efficiency rating at converting AC to DC. For an 80+ Bronze power supply at 50% load, it has an efficiency rating of 85%. This means that during the conversion from AC to DC, 15% of that power is lost. So if your system requires 500W at 50% load, the power supply needs to pull 589W from the wall.

80+ certification does not determine the power supply's build quality or performance. It is possible to have good conversion rating while being built with cheap capacitors and under-performing. There is no rule that says the power supply has to be able to handle heavy load well to be 80+ certified. So you can be gaming and you are running on heavy load and the power supply can't handle it and causes your system to crash.

Oh, I see. Now I'm knowing something about PSU's. Anyway, I think you missed the UPDATE part on my above post, ksham. For my PSU, it states 44A for +12V rail. How's that?

ksham · Jul 18, 2014

That is fine; but the build quality of your power supply is still crap so I strongly advice replacing it. As I've said earlier, a power supply built on cheap and poor capacitors will not handle heavy load well and can cause crashes and freezes mid-game. This will also affect your other components because their lifespan is cut short by the power supply.

The power supply has to provide electrical power to every component. This is a sensitive area. The power supply has big shoes to fill. A bad one with poor ripple suppression or bad voltage regulation will cause harm to your other components. And there are a lot of them because the power supply is connected to EVERY SINGLE ONE.

MostWantedSoulRider · Jul 18, 2014

Thanks for your quick help, ksham. But one thing to be noted is, I can't afford another power supply for hopping into 280x from 270x. I think I'm going to wait for some more days, reconsider my budget limit and then afford both GPU and PSU together.

MostWantedSoulRider · Jul 18, 2014

ksham :

http://www.flipkart.com/antec-vp550-550-watts-psu/p/itmd5xz45hr9fyu5
Will this be good to go?

ksham · Jul 18, 2014

Corsair VS650.

The one you chose is not Haswell-compatible and not great. The Corsair one that I picked is a tier above it, but still not ideal. But if you are worked up on price, you may as well get the better of the two.

If you want a really good quality power supply, here are two:
Seasonic S12II 520W
Seasonic S12II 620W

620W provides better upgrade path to more demanding graphics card without having to get a new power supply as often.

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XFX Radeon R9 280X Double Dissipation VS MSI R9 270X

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