OptiPlex 780 MT Power Supply

Question

Is this the correct power supply for the above system? http://www.dell.com/en-us/shop/visiontek-power-supply-internal-atx12v-500-watt/apd/a7042093/computer-chassis-components

DELL-Chris M · Accepted Answer

We never sold the OptiPlex 780 MT with a 500w PSU (power supply unit) ? The following are the Dell OEM 305w PSU validated for the OptiPlex 780 MT =
18N8R
CY827
MK9GY
PF3TR
P192M
M360M
WU133

Just do a search for each part number like this =
dell part 18N8R

DELL-Chris M · Accepted Answer

Go here.

speedstep · Accepted Answer

No thats not the proper power supply.

Dell WU133 - 305W Power Supply for Dimension

E310 E510 E520 E521 Optiplex 755, 760, 780, 960

You need a 24 pin EPS12v power supply with AT LEAST 150W on

the 3.3v/5v rails. It doesnt have to be from dell but the 5vsb and 3.3v/5v rails cannot be ignored. Power supplies are more than just the 12v rails and a single spec of watts.

http://www.evga.com/Products/Product.aspx?pn=110-B1-0750-VR

This Spec is why an EVGA NEX 750 B1 G1 works fine but a B2 BQ G2 does not.

http://www.evga.com/Products/Product.aspx?pn=120-G1-0750-XR

Note the max power for the B2 is LESS THAN 150W

chris1948 · Answer

Thanks very much Chris.  Maybe you can answer this also. My system runs Ubuntu Linux only. Is there a way to run the Dell diagnostics or would I still need something like WINE to do this?

chris1948 · Answer

Thanks Chris, worked great. All tests passed so I guess the problem I have when I try to restart after a shutdown is more than likely the PSU.

chris1948 · Answer

Thank you very much, appreciate all the information.

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OptiPlex 780 MT Power Supply

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