How Do I know what Graphics card will fit in my motherboard?

Solution
you will need a graphics card that has a PCI Express x16 to fit in the slot.

Here's a budget setup with the parts you wanted. It has an average graphics card or mid range.

PCPartPicker part list / Price breakdown by merchant

CPU: AMD FX-8320 3.5GHz 8-Core Processor ($139.98 @ NCIX US)
Motherboard: Asus M5A78L-M LX PLUS Micro ATX AM3+ Motherboard ($44.98 @ OutletPC)
Video Card: XFX Radeon R9 270 2GB Core Edition Video Card ($149.99 @ NCIX US)
Total: $334.95
Prices include shipping, taxes, and discounts when available
Generated by PCPartPicker 2014-10-08 20:28 EDT-0400

you will need a graphics card that has a PCI Express x16 to fit in the slot.

Here's a budget setup with the parts you wanted. It has an average graphics card or mid range.

PCPartPicker part list / Price breakdown by merchant

CPU: AMD FX-8320 3.5GHz 8-Core Processor ($139.98 @ NCIX US)
Motherboard: Asus M5A78L-M LX PLUS Micro ATX AM3+ Motherboard ($44.98 @ OutletPC)
Video Card: XFX Radeon R9 270 2GB Core Edition Video Card ($149.99 @ NCIX US)
Total: $334.95
Prices include shipping, taxes, and discounts when available
Generated by PCPartPicker 2014-10-08 20:28 EDT-0400

 
Solution

BustaRhymes

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Jun 16, 2014
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That motherboard is an AM3+ motherboard so you need a processor built for AM3+ like the AMD FX 4300, FX 6300, or FX 8350. Any graphics card should work.

I generally prefer Intel processors though and that motherboard won't support Intel processor.