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Psu for hd 7850 and ram requirements

Last response: in Graphics & Displays
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June 8, 2012 9:20:47 AM

Hi! I need your urgent help as i am buying the pc very soon. I am buying the corsair cx v2 430 psu. I am going for a i3 2100, Dh67-bl mobo with 4 gb of ram and hd 7850. When I checked the max wattage of my psu at their official site, it says 336W and max amperage is 28A. So I know it will run my graphic card. But what I would like to know is while playing these highend games and both CPU and Gpu maxed out, will my psu work out in the long run?Can it provide enough power to the whole system easily?Regarding ram i know it will support 1333mhz but i have many people are recommending me the 1666mhz ram.Why is that (when the bios will run the 1666mhz ram at 1333mhz)?Is 4gb ram enough for windows 7 64 bit?Do I need to add more since I will be playing as well? Thanks in advance!
a b U Graphics card
June 8, 2012 10:30:28 AM

A 380w psu would be more than sufficient. Your system doesn't use anywhere near 336w, more like 200w.

4GB is sufficient, but it's so cheap you might as well get 8GB. Newegg has 8GB kit for $35 right now.

Your 2100 only supports 1333, but if you upgrade to a new quad core down the road it will support 1600.

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a b U Graphics card
June 8, 2012 10:33:59 AM

Yes, the Corsair CX V2 430 PSU is okay. The 7850 is not a power hog by any means.

And since you are buying the DH67-BL which only have a single PCIe slot, there is no need to provision for crossfire or sli so the 430W psu is great.

You do not need to worry about stressing you CX because it has been tested to carry up to 127% overload:
http://www.hardwaresecrets.com/article/Corsair-CX430-Po...
The power that your PC can draw is just around 300W at max.
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June 8, 2012 12:58:15 PM

I am gonna be using a 21.5" HD monitor if it helps. My friend keeps telling me the amd site says minimum 500w psu is required and my corsair won't even last for 3 months if I choose to buy it :( 
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a b U Graphics card
June 8, 2012 1:02:51 PM

Your friend is wrong. The 7850 pulls 110w and the cpu pulls 65w at the most, the whole system uses about 200w.

I'm running the same setup with 8GB ram and 2 7200rpm hd's and my 5850 pulls 150w. By my calculations I have about 130w of headroom on my 380w psu.
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a b U Graphics card
June 8, 2012 1:12:51 PM

geekapproved said:
Your friend is wrong. The 7850 pulls 110w and the cpu pulls 65w at the most, the whole system uses about 200w.

I'm running the same setup with 8GB ram and 2 7200rpm hd's and my 5850 pulls 150w. By my calculations I have about 130w of headroom on my 380w psu.

+1
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June 8, 2012 2:08:09 PM

You all have been of great help!Thanks for putting my mind at ease fellas!Getting my system tomorow :D 
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June 8, 2012 2:13:15 PM

Best answer selected by kon-.
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a b U Graphics card
June 8, 2012 3:06:23 PM

I'd recommend the 2120 for $5 more.
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June 8, 2012 3:46:29 PM

geekapproved said:
I'd recommend the 2120 for $5 more.

May I ask why? (not that i dont mind spending on it as long as there is a good reason)
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a b U Graphics card
June 8, 2012 3:58:31 PM

It's 3.3ghz not 3.1ghz.
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June 8, 2012 4:00:59 PM

Oh! one more question, Can I go for a factory OCed model of HD 7850 for this psu ?
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a b U Graphics card
June 8, 2012 4:12:49 PM

Absolutely, or overclock it yourself.
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June 8, 2012 4:15:37 PM

Nice! Thx for your help :) 
Goodnight !
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a c 272 U Graphics card
June 8, 2012 8:32:50 PM

This topic has been closed by Mousemonkey
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