Upgrading Dell Optiplex 745 mini tower PSU

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GannicusZX

Honorable
Aug 17, 2013
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10,510
Will this
http://www.bestbuy.com/site/EVGA+-+500+Bronze+500W+Power+Supply+-+Black/1017256.p?id=1219045510716&skuId=1017256

Fit in the Dell Optiplex 745 Mini Tower?
Also, is this a good choice for a PSU?

This is my Graphics card I purchased:
http://www.bestbuy.com/site/XLR8+GeForce+GTX+650+2GB+GDDR5+PCI+Express+3.0+Graphics+Card/6820159.p?id=1218808243147&skuId=6820159&st=geforce%20gtx%20650&cp=1&lp=4

I do not want to buy a new case, I just want to upgrade the PSU for now. If this PSU will not fit, what PSU would you recommend?
 
Solution
ko888
For a system using a single GeForce GTX 650 graphics card NVIDIA specifies a minimum of a 400 Watt or greater system power supply that has a maximum combined +12 Volt continuous current rating of 20 Amps or greater and that has at least one 6-pin PCI Express supplementary power connector.

Total Power Supply Wattage is NOT the crucial factor in power supply selection!!! Sufficient Total Combined Continuous Power/Current Available on the +12V Rail(s) rated at 45°C - 50°C ambient temperature, is the most critical factor.

The EVGA 500 BRONZE 500W (100-B1-0500-KR) power supply unit, with its maximum combined +12 Volt...
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ko888

ko888

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Feb 18, 2009
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For a system using a single GeForce GTX 650 graphics card NVIDIA specifies a minimum of a 400 Watt or greater system power supply that has a maximum combined +12 Volt continuous current rating of 20 Amps or greater and that has at least one 6-pin PCI Express supplementary power connector.

Total Power Supply Wattage is NOT the crucial factor in power supply selection!!! Sufficient Total Combined Continuous Power/Current Available on the +12V Rail(s) rated at 45°C - 50°C ambient temperature, is the most critical factor.

The EVGA 500 BRONZE 500W (100-B1-0500-KR) power supply unit, with its maximum combined +12 Volt continuous current rating of 40 Amps and with two (6+2)-pin PCI Express supplementary power connectors, is way more than sufficient to power your system configuration with a single GeForce GTX 650 graphics card.

This PSU should physically fit into the Dell Optiplex 745 Mini Tower.
 
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Solution
G

GannicusZX

Honorable
Aug 17, 2013
8
0
10,510



I was also considering this as my PSU

http://www.bestbuy.com/site/Dynex%26%23153%3B+-+520W+ATX+CPU+Power+Supply/2658156.p?skuId=2658156&id=1218342638023#tab=overview

Would this be a good choice as well?

Which of these two would be the better choice?
also will this one fit?
 
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ko888

ko888

Titan
Feb 18, 2009
16,708
41
84,990


That Dynex 520W (DX-520WPS) is only 520 Watts peak power. Its maximum continuous rating is only 420 Watts. The OEM is SHENZHEN HUNTKEY ELECTRIC CO LTD.

Its maximum combined +12 Volt continuous current rating should be at least 27 Amps.

The EVGA 500 BRONZE 500W (100-B1-0500-KR) is definitely the better of the two.
 
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