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Which is best for me: Radeon 4550, 5450, or 5570?

Last response: in Graphics & Displays
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Hello,
I have had my pc for a few months using the intel integrated graphics and would like to upgrade a little to play some light games, nothing crazy. I have the following specs and would like everyone's professional opinion! I really don't know how to upgrade my power supply, so I prefer leave my machine as is and get something that will work for it with the current psu.
I need a low profile card, pci-e

Which of the cards above, Radeon 4550, 5450, or 5570 would be best for me? Can I run any of them or should I stick with the Intel HD graphics?

Lenovo H320
Processor Intel® Core™ i3-540 (3.06GHz, 4MB L2, 1333Mhz FSB)
Operating System Genuine Windows 7 Home Premium 64 - English
Total Memory 4GB (2 X 2GB) PC3-8500 DDR3 1067MHz SDRAM SODIMM Memory
Hard Drive 1TB, 7200RPM Serial ATA 3.5" Hard Drive
Graphics Intel® Graphics Media Accelerator HD

Power Supply:
FSP Groupp Inc.
Output Power: 180w(+3.3v &5.08V=80W Max)(+3.3V & +5.08V & +12V=170W Max)(-12V & =5.08Vsb=13.66W Max)

DC Output: +12V==14A(yellow) -12V==0.3A(blue) +5.08V==10A(red) +3.3V==16A(orange)

Stadby Output: +5.08Vsb==2.0A(purple)

That's all the info I have, thanks for your help!!

More about : radeon 4550 5450 5570

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I have a 21.5 inch 1080p monitor. I don't mind changing the psu if i can and it isn't too hard. Do you think i could run a 5570 now? I just want to play wow lotro or some older games. Nothing crazy and it doesn't have to be high res just decent fps.

Graphics card Master

http://shop.lenovo.com/us/landing_pages/essential-deskt...
"The Lenovo H320 small-form-factor (SFF) PC"

the case is so small that the psu will likely be smaller than standard atx unit, so finding a replacement might be a bit more difficult...

5570 uses up to 50W (in furmark, 37W in 'games'), though the power color one uses a little less
http://www.techpowerup.com/reviews/Powercolor/HD_5570/2...

5450 maxes out at 13W, and 4550 at 19W
http://www.techpowerup.com/reviews/ASUS/GeForce_GTX_550...

They should all work with the current psu, just dont run furmark and prime95 at the same time on it and you should be just fine :p 

And unless it wasnt clear, the 5570 has the most oomph, you could even play some games with it. :D 
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Thanks for the help! I will probably go with the 5570, because it seems to have a little bit of graphic power and should not fry my system, haha. Thanks again to everyone for the advice, this is cool place!!

-ncstateguy87
Graphics card Master

as per my link 150w is about his expected max useage from the wall. assume 80% efficiency and your down to much less than his psu is capable of producing. Should be ok. But yeah, make sure you have at least 1 exhaust fan to prevent heat buildup.
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