Most powerful graphics card for Dell Optiplex 755 minitower with added 500w Power Supply

I'm new to the forum.
I recently bought a refurbished Dell OptiPlex 755 minitower, with the 305 watt power supply.
I've ordered an upgraded power supply: PC Power and Cooling PPCS500D Silencer 500 Dell 12V 80+ Certified Power Supply

The machine is a Intel® Core™2 Duo Processor E6850 (3.00 GHz, 1333 MHz FSB) vPro, VT.
It's running Windows 7 Professional at 64-bits.
It currently has 4gb memory, but I'm going to upgrade that to 8gb.
I may get into gaming, not sure yet.

I've been reading through this forum and saw that the normal video card can only take 75 watts of total power, which it gets from the card slot.
The power supply I ordered has two PCI-VIDEO connectors. One is a 6-pin, and the other is an 8-pin.

My question is, with the replaced power supply, and the PCI-VIDEO connectors: What is the fastest, most powerful video card I can put in the machine?
Thanks in advance for any info.
4 answers Last reply Best Answer
More about powerful graphics card dell optiplex 755 minitower added 500w power supply
  1. Best answer
    The minitower has normal height expansion slots correct?
    So the most powerful GPU that would technically work with that power supply is a GTX 770 or an AMD r9-280(280x if you don't get an overclocked model). The fastest GPU that won't be bottlenecked by the platform would be closer to an AMD 260x / GTX 750ti.
  2. Yes, to my knowledge, the expansion slots are normal height.
    Thanks for the info.
  3. You're welcome. PM me anytime if you have other questions.
  4. Thanks for the info again guyz ! #Tomshardware Rocks !

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