Dx11 gpu

Hi all,

I'm considering a new Asus ATI Radeon 5870 1024MB GDDR5

I'm just want to know if my 450W PSU will be big enough to handle it. My current specs are listed below. I don't really want to buy a new PSU but if it needs it I best take the plunge.

Cheers.

nate42nd said:

I wouldn't be surprised if your 4850 eats more power than the 5870. I don't think you NEED a new PSU. The Corsiar 450 is fine. Good luck on the upgrade. I almost got a 5000 series card too. Ended up with a GTS250 of all things. It does me fine.

The 4850 I have currently runs pretty sweet but I'm hoping with the 5870 that the system will eat the likes of Crysis and Metro 2033 right up.

TheSchaft said:

This link came up in another thread a little while ago, it may help you decide: eXtreme Power Supply Calculator

I'll take a look at this, cheers!

I'm using the ASUS ATI Radeon 5870 on a Corsair 620W PSU with no problem.
I'm not sure if 450W is enough or not.

Remember that ASUS 5870 requires 2x 6-pin power cables.
-The Corsair 450W "only" has one 6-pin and one 8-pin, if I remember correctly.

Looks like the Corsair PSU has two 6+2 pin PCI-E connectors, so that's all right for the 5870.

Sapphire recommends a minimum of 500W for the PSU for a single 5870, but not all PSUs are created equal. The Corsair HX450 is rated at 33A on its single +12V rail. Some cheap 600W supplies are rated lower than that.

I don't know what the actual power draws are for the 4850 and the 5870, but according to the calculation link above, the 5870 draws less than 10W more than a 4850.

I'd say that if the 4850 is OK, the 5870 should be too. Whether upgrading will improve your life, I can't say.

bobkn said:

Looks like the Corsair PSU has two 6+2 pin PCI-E connectors, so that's all right for the 5870.

Sapphire recommends a minimum of 500W for the PSU for a single 5870, but not all PSUs are created equal. The Corsair HX450 is rated at 33A on its single +12V rail. Some cheap 600W supplies are rated lower than that.

I don't know what the actual power draws are for the 4850 and the 5870, but according to the calculation link above, the 5870 draws less than 10W more than a 4850.

I'd say that if the 4850 is OK, the 5870 should be too. Whether upgrading will improve your life, I can't say.

Yeah, the PSU does have two 6+2 outs. I'm going to assume all is well. I suppose a decent PSU isn't that expensive an upgrade if the system needs it. All being well the 450w will hold up.

Cheers for the info guys.