Tom's Hardware > Forum > Graphic & Displays > Graphics Cards > Will this psu good with 4870?
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neozengar   10-05-2009 at 04:52:32 AM

I have a corsair 400cx. http://www.newegg.com/Product/Prod [...] ir%20400cx
The CPU is i5 and I have only 1 hdd and 3 120mm fan and 2 sticks of ram. That is all the power I used. I check online a 4870 require 30A on the 12v rail and my psu provide enough amps. Just wondering, would you guys recommend this 4870 http://www.newegg.com/Product/Prod [...] 6814150436 The the price of 120AR. Am I going to run into any kind of problem with this setup? If so, what are you recommendation? Should I wait 1 more month for the new 5700 series with lower power consumption?

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FallenSniper   10-05-2009 at 05:01:26 AM

That seems to be cutting it really close to me. If you can wait then I would recommend doing that. Waiting always produces good results :D

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mlcloud   10-05-2009 at 05:09:36 AM

I wouldn't recommend running the 4870. I mean, technically you do have the amperage necessary, but you're going to have to get a molex-6pin adapter, which probably isn't the greatest thing to do.

Get a power supply that comes with 2x6pin default, or wait. Waiting is good if you don't have anything you desperately need to play.

------------------------------ q9550 2.83ghz @ 3.91ghz
4gb OCZ Platinum DDR2-1066 RAM
Powercolor HD 4890
http://i40.tinypic.com/zks3yu.jpg
 Reply to mlcloud
magicbullet   10-05-2009 at 07:19:26 AM

you have more than enough.

I used to owned 400W PSU with 33A and it run this spec:
q6600 OC@ 3.0ghz this take much more energy than i5
2 sticks of ram
GTX275
2 hdd
1 dvd-rom
4x120mm fans
an audigy something sound card.

the recommended wattage are literally almost double of what it is actually needed, so dont even worry about it.

Reply to magicbullet
michaelmk86   10-05-2009 at 12:58:45 PM

You psu is more than enough for your system. No need to waste money on a new psu.

Reply to michaelmk86
rodney_ws   10-05-2009 at 02:54:17 PM

I'm curious whether that i5 is at stock speed. If it's overclocked, that would change things a little.

Reply to rodney_ws
neozengar   10-05-2009 at 05:21:22 PM

Thanks for the input, but right now I am even more confuse. Half of you guys said its ok while half said no. I probably wont overclock the i5 at all.

Reply to neozengar
michaelmk86   10-05-2009 at 06:03:56 PM

I have a corsair 620W with a system that consume double watt than your system.

corsair 620W
i7 920 OC 3.8(130 Watt stock , OC 3.8 195 Watt)
GTX295 OC(289 Watt)
+ other components


corsair 400W
i5(95 Watt stock)
4870(160 Watt)
+ other components

As you can see you have nothing to worry about, you PSU is enough for your system. :)

Reply to michaelmk86
nashlofer   10-05-2009 at 06:33:48 PM

Your PSU seems fine... but if you'll ask me I'll settle for 620W PSU this is an allowance for O.C. or other "future" upgrades. Most probably peripherals and other components tends to increase their power rating....
So... if your system couldn't cope up then you may have to spend on another PSU. I'll buy the bigger rating... IF the price isn't that SKY HIGH difference.
Just a suggestion.

Reply to nashlofer
mlcloud   10-06-2009 at 11:31:51 PM

Eh. I was never a fan of using those 2x molex to 6 pin adapters, but whatever floats your boat.

------------------------------ q9550 2.83ghz @ 3.91ghz
4gb OCZ Platinum DDR2-1066 RAM
Powercolor HD 4890
http://i40.tinypic.com/zks3yu.jpg
 Reply to mlcloud
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