What kind of power supply do I need?

AstroMagic

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I am running a hp pavilion p7-1125 computer. i added 4 more gb of ram to it that doesn't work but i will soon get a 1333hz ram that works with my computer. So what kind of power supply do i need if i want to upgrade to a sapphire radeon r7 240?
 
Solution
A R7-240 is only marginally stronger for gaming than the stock Intel integrated graphics.
And... you have only a 300w psu; A R7-240 wants a 350w psu:
http://www.realhardtechx.com/index_archivos/Page362.htm
I might suggest a stronger more efficient $70 GT730(64 bit) or a stronger $130 GTX750. Both of which will run on 300w.
A R7-240 is only marginally stronger for gaming than the stock Intel integrated graphics.
And... you have only a 300w psu; A R7-240 wants a 350w psu:
http://www.realhardtechx.com/index_archivos/Page362.htm
I might suggest a stronger more efficient $70 GT730(64 bit) or a stronger $130 GTX750. Both of which will run on 300w.
 
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AstroMagic

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[quotemsg=14999841,0,108213]A R7-240 is only marginally stronger for gaming than the stock Intel integrated graphics.
And... you have only a 300w psu; A R7-240 wants a 350w psu:
http://www.realhardtechx.com/index_archivos/Page362.htm
I might suggest a stronger more efficient $70 GT730(64 bit) or a stronger $130 GTX750. Both of which will run on 300w.[/quotemsg]

So i dont need a power supply? I actually might consider the GT730 or the 750 thanks! Also what games can they run at what frame rate can do they at what settings?
 

AstroMagic

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[quotemsg=15000117,0,108213]Certainly much better than what you have.

Best to run and see. Or, look for benchmarks of the games you are interested in and go from there.[/quotemsg]

Ok so with my current power supply can i actually run the 750? i would love too! and thanks for the suggestion