Re:  Q1: what is the likely hood that the mobo is flunked? It doesn’t look broken, only very dusty.  IDK dusty may not correlate w health. Q2: What is the fastest CPU I can upgrade to? (Quad-core preferred) Q9650 not sure if your mobo R230R supports quad cpu though (see reference below) apparently your mobo is not SFF but DT.  Dell OEM Optiplex 760 DT Desktop Motherboard (System Mainboard) - R230R Q3: What is the largest amount of RAM I can upgrade to? 8 GB (4x2 GB) Q4: What is the largest(and fastest) hard drive I can upgrade to? (And can I put in another one?)  No limit. Q5: Can I put a graphics card in? If so, what is the fastest one I can use on a budget?  GTX750 Ti is the top gpu that matches core 2 quad cpu without bottlenecking.  problem is this card does not fit SFF/DT case unless you mod the case. the fastest card that can fit SFF/DT are GT1030 or GT 730, both gddr5. Dell Optiplex 760 DT (Desktop). Motherboard - R239R, D517D, M859N  [IMAGE]   according to one, The Optiplex 760MT and SFF uses two motherboards - T674K Non-Quad core CPU motherboard U562N Quad core CPU motherboard MT M863N Quad core CPU motherboard SFF F373D N449H J656F not verified but for reference.
760I have a Dell optiplex 760 SFF with a 2006 core 2 duo E7500, my motherboard is OR230R, I have 2x1GB ram, and a sea gate barracuda 250gb hard drive. My power supply is 255w. Q1: what is the likely hood that the mobo is flunked? It doesn’t look broken, only very dusty. Q2: What is the fastest CPU I can upgrade to? (Quad-core preferred) Q3: What is the largest amount of RAM I can upgrade to? (Quad dimm preferred) Q4: What is the largest(and fastest) hard drive I can upgrade to? (And can I put in another one?) Q5: Can I put a graphics card in? If so, what is the fastest one I can use on a budget?
Can I replace my optiplex 760 cpu?