Would an Asus F2A55-M (Asus M11BB stock) be compatible with a 750W Power Supply?

corey deneire · Dec 10, 2013

I am somewhat tech-savvy, but when it comes down to specifications on the motherboard, I turn into a giant dummy.

I purchased a M11BB from Best Buy recently and wanted to turn it into somewhat of a gaming PC. My first purchase was a AMD 7770 HD Radeon gfx card where I assumed everything would be okay - But, of course the games would crash which I assumed is due to lack of power (stock Asus M11BB comes with a 350W power supply). So, using my common sense, I went ahead with purchasing a 750W power supply. But, when attempting to run the PSU when just having the 12V and 24 pin connector attached to the motherboard as a trial run before full installation - the fan kicks in for a short second and then stops.

Would this power supply be compatible with my PC? Thanks for your help!

alexoiu · Dec 10, 2013

It should work, but from the description. it looks like a short or a wrong connection. What power supply have you bought?

iceclock · Dec 10, 2013

yes what powersupply did u purchase sir.

corey deneire · Dec 10, 2013

*Fixed as reply

corey deneire · Dec 10, 2013

alexoiu :

Here is the model I purchased - http://www.tigerdirect.ca/applications/SearchTools/item-details.asp?EdpNo=7850414&CatId=2533

iceclock · Dec 10, 2013

no i meant whats the powersupply u bought

corey deneire · Dec 10, 2013

iceclock :

Ultra LSP Series V2 750-Watt Power Supply - ATX, 6x SATA, 2x PCI-E, 20/24-PIN, Thermal Controlled, 135mm Fan, Single +12V Rail, Short Circuit, Over-Voltage and Thermal Protection, 3-Year Warranty
Item#: U12-42507 | Model#: U12-42507

http://www.tigerdirect.ca/applications/SearchTools/item-details.asp?EdpNo=7850414&CatId=2533

alexoiu · Dec 10, 2013

Are both 24 and 4 pin power cables connected?

corey deneire · Dec 10, 2013

alexoiu :

Correct - I've connected these two cables:

with the 750W, flick on the power supply then press the power button and the fan on both the processor and the power supply spin for a fraction of a second and then stop.

If I connect the original 350W power supply with the same cables, everything works.

Not sure what could be causing this?

alexoiu · Dec 10, 2013

Weird. Can you test the new power supply with a different system (for making sure that it does work)?

corey deneire · Dec 10, 2013

alexoiu :

I've completed a paper clip test on the power supply and the fan spins without issue - And since there is signs of movement after pressing the power button (fraction of a second) would that not be its attempt to boot the system? :??:

alexoiu · Dec 10, 2013

The paper clip test is not relevant, as the power supply might fail under load. I would try though RMA-ing the power supply (or returning it and asking for another one, if under 30 days).

corey deneire · Dec 10, 2013

alexoiu :

I'll try connecting it to a secondary PC to be sure - This power supply was new in box / wrapping when I purchased it, not sure why it would need to be RMA'd right away?

Are there no other troubleshooting steps to attempt?

iceclock · Dec 10, 2013

id rma it doesnt seem right. if everything is connected should work mate.

corey deneire · Dec 10, 2013

Is it possible that certain motherboards don't accept 750W ones?

alexoiu · Dec 10, 2013

No. It should work.

iceclock · Dec 10, 2013

nope should work mate.

corey deneire · Dec 11, 2013

Tried the power supply again last night and it worked! For some reason it wanted me to reinsert the 24 pin cable into the motherboard after all connections were made to each piece of hardware -- Strange, eh? I tried earlier with just the 12v and 24 pin like I stated earlier, but, that was only after removing all other cables and not reinserting the 24 pin. After confirming the power supply was working, I made sure to go through device by device to ensure that there wasn't a piece of hardware specifically shorting the PSU. Thanks for your help anyways guys.

iceclock · Dec 11, 2013

cool dude happy it worked

macdog · Apr 7, 2014

Did you have any issues with temperature after installing the new card and power supply? How is it running? I was considering doing the same thing, but noticed that it has a small case also. Worried about overheating the system.

Would an Asus F2A55-M (Asus M11BB stock) be compatible with a 750W Power Supply?

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