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SFF PSU help needed!

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August 29, 2012 3:43:49 PM

I recently bought a ThinkCentre M91p (4480-B1U) off of craigslist and am now trying to make it so my friend can use it for gaming. The problem is that it comes with a 240 watt psu. In addition, the computer is SFF, so I need a low-profile graphics card. The main game he is trying to play is FFXIV, but I'm sure he'll play others; looking to spend about $100 on the graphics card.

The computer is an i5-2400.
So my questions are what type of power supply do I need; wattage and size? And are there any recommendations for low profile graphics cards or am I wasting my time and should I just move the whole thing to a larger case?

Thanks a bunch!

More about : sff psu needed

a b ) Power supply
a b U Graphics card
August 29, 2012 3:49:13 PM

The most powerful GPU available in low-profile form factor is HD7750 (~$115) which should work fine on a 240W PSU if it is reasonably good.
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August 29, 2012 4:45:33 PM

Okay, so 240 watts is enough for the i5 and a graphics card?
Thanks for the quick responses!
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August 29, 2012 4:46:15 PM

On the website for low profile 7750 it says "Minimum of a 400 Watt power supply."

Any recommendations for power supplies?
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August 29, 2012 5:18:09 PM

epiphanyplx said:
On the website for low profile 7750 it says "Minimum of a 400 Watt power supply."

Any recommendations for power supplies?

Feel free to ignore that recommendation. They are covering their butts. They have no idea what kind of system you have, so they recommend high wattage. The max TDP of the 7750 is 55 watts. You shouldn't have any problems with the 240w PSU, so long as it's an ok PSU.

If you find you absolutely need to upgrade your PSU, this one is good for SFX: http://www.newegg.com/Product/Product.aspx?Item=N82E168... However, I don't know if it fits your particular case.

As you mentioned, another option is to move to a bigger case. If he wants to get a somewhat powerful card, low profile isn't going to do the trick.
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a c 87 ) Power supply
August 29, 2012 9:32:37 PM

According to this link (Lenovo website). The PSU used in the ThinkCentre M91p is a TFX form factor power supply.
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August 31, 2012 5:50:19 PM

Okay, so my friend wants a more powerful graphics card than the most powerful low profile card. I am going to move the whole thing to a different case and get a new power supply.
I do have a 400 watt atx psu sitting around, do you think that would power a $200 graphics card with one hard drive and the i5, or do you think I should get something closer to 500 or 600 watts?

Thanks for all the help.
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a b ) Power supply
a b U Graphics card
August 31, 2012 8:05:00 PM

epiphanyplx said:
I do have a 400 watt atx psu sitting around, do you think that would power a $200 graphics card with one hard drive and the i5, or do you think I should get something closer to 500 or 600 watts?

Depends on whether it is a GOOD 400W PSU or a crappy 400W PSU.

A 380W Antec EarthWatt, Seasonic or other top-quality PSU will handle just about any high-end single-GPU card/system out there.

On the other hand, a crappy 400W PSU might not even be able to power a basic system that uses less than 200W reliably.
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