Acer Aspire M1641 PSU upgrade

Hello!
I am thinking about upgrading my Computer's graphics card and then came the issue of upgrading my PSU. So for the Acer Aspire M1641 what kind of PSu would be compatible??
Upgradeing my Graphics card to a Geforce 9500GT
Also having the issue of my current graphics card Geforce 7100 integraded with the mother board anyway to disable it??
Thank You!

Being a mini tower it will accept any std size ATX PSU here is a nicely priced unit from Corsair that will run your system with the new card easily http://www.newegg.com/Product/Prod [...] 6817139017
The integrated can be disabled in BIOS.

Yes it will work although Thermaltake does not come as highly recommended as corsair in the PSU business. Other units to look at is Antec. BIOS (basic input/output system) is sometimes called setup and is accessed on start up before loading operating system.
The corsair at tiger http://www.tigerdirect.com/applica [...] CatId=1078

The EVGA is the better brand, the memory size 512mb or 1GB does not matter for cards at that performance level but both will work.
Just saw that tiger has a great deal on http://www.tigerdirect.com/applica [...] CatId=3585 after rebate which is a much better card.

The Thermaltake is overrated crap; the little voltage switch is a giveaway to an obsolete design.
Corsair makes good PSUs, but the Builder series looks like FAIL to me because it isn't even 80+; their old CX PSUs were, and the Antec Earthwatts are 80+ BRONZE. I'm not sure why Corsair would take a backwards step like that. Anyway, I've bought a few of the 380W Earthwatts, and they are quiet and solid as well as efficient.

Oh and I haven't done anything with BIOs and the integrated Graphics card is still in operation, I'm then kinda new at the BIOs could someone tell me the steps for it?
Thank YoU!

Well All I did was first install the PSU and hooked everything up turned it on everything was fine, and then installed the Graphics card, just by putting it in the slot that its supposed to go in and then when I turned it on the monitor was black.

The integrated is the default if it is disabled because of a new discrete card is installed it will enable again by resetting BIOS to defaults.
Basic steps installing a new card; In device manager disable old card (deletes drivers)/ shut down and physically install new card and make all connections/Start up and install drivers for new card.
If video is not shown on the new card go back to integrated and enter BIOS/setup on start up and select PCIexpress as default for graphics.