Im looking at a dell optiplex 755 is it worth buying to rebuild into a better pc

[nil123004]

i found a dell optiplex 755 on ebay for $35 is it worth buying to rebuild?

 

[thesnowleopard782]

The Q6600 was old when that computer was built. The Q6600 @ 2.4GHz is a 23- 24% CPU. With a tapemod overclock to 3GHz it's 36%. Q9450, Q9505S and Q9550 are faster 38-39%. The money on the GPU isn't wasted. It can move forward. You chose a 1066FSB 2.4GHz CPU when the options went up to 3GHz 1333 fsb. . The only slower 4 core CPU is the Q6400. I am finding the 4GB GPU and 8GB RAM IS a tight fit and background programs need to be turned off for gaming. Maybe a gaming user profile. The Zotac Mini I referred you to drops right in with no mods. It's the only card that does.
https://www.youtube.com/watch?v=zGJK_8DbI3o

I tried it. It gave me no video and a fan running like wild....

 

[william p]

Do you have the latest BIOS installed.? If it's the B3 stepping the odds are against it working without a Voltage increase. Did you try modding the E7500? They're all the R0 stepping and are very power efficient. The simplest solution in a Q9650, or Q9550S, Q9550,9500, 9505S,Q9450. They're all slightly faster than the modded Q6600. The Q9650 quite a bit. The "S" suffix chips are 65W and don't need a heatsink upgrade. Some of them are $20 or less. The 755 is known to contain some LGA775 Xeon microcode, but those chips are going for more than the regular LGA775 lately. The LGA771 mod won't work. You could try the SetFSB method of overclocking. You need to find the PLL chip# and enter it into SetFSB. Then you can raise FSB with the arrows (not the slider) incrementally. It may be hardwired at the 333fsb limit, but should work from 266>333. The older SetFSB version is Freeware.2.2.134.98
http://www13.plala.or.jp/setfsb/
50*C. shouldn't be throttling.
http://www.overclock.net/t/1515211/successfully-overclocked-dell-optiplex-755-usff

 

[thesnowleopard782]

well I tested it [Q6600] for a solid four and a half hours, with lows of 69c and spikes of up to 78c. I tried my GPU and the thing froze up and the GPU got really hot even when I upgraded the PSU. I'm not trying that on this board again. I really want to get my GPU working. And if not, I at least want a halfway decent web browsing PC, which I have. So I'm gonna pass on the overclocking and GPU until I get a board rigged to do so with PCIe 3.0's.