I have a Lenovo Thinkcentre M58 small form factor PC. It currently has only a Core 2 Duo E8400. I've seen some, however, that have Core 2 Quads. The BIOS is very strict, so I don't know what specific Core 2 Quad I can put in it. Does anyone else know?
What type of Core 2 Quad can I put in a Lenovo Thinkcentre M58 SFF PC?
Should be able to use any Intel socket 775 CPU
These CPUs are obsolete though, you would need to buy them online.
Intel Core 2 Quad Q8200 is shown on some units sold factory installed and Q6600
Some M58p models with graphics card sold with M58p - SFF - Core 2 Quad Q9550, Core 2 Quad Q9400
Bios should be updated to the latest level. There were USFF, SFF, and Towers and possibly a Desktop model.
If you provided the specific model number it might help.
M58p on ebay shows with a Q9650 installed
Intel Core i3-8100 @ 3.60GHz score 8033 as a new desktop pc, and laptops typically over 5000 score
Core2 Duo E8400 @ 3.00GHz 2149 65 Watt, 100.3 Watt maximum power
Core2 Quad Q6600 @ 2.40GHz 2948
Core2 Quad Q8200 @ 2.33GHz 2811
Core2 Quad Q9400 @ 2.66GHz 3340
Core2 Quad Q9500 @ 2.83GHz 3521
Core2 Quad Q9550 @ 2.83GHz 3963
Core2 Quad Q9650 @ 3.00GHz 4160 95W design, 132.48 Watt maximum power