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Dell 755 cpu upgrade?

post #1 of 4
Thread Starter 
I have an Optiplex 755 sff with the q6600 in it and Im thinking about buying a mini tower 755 with the q6600 also. I know I can upgrade to the q9650, q9550, or q9450 no problem. But what about the xeon x3350, x3360, x3370, x3380, x3353, x3363? Specifically the x3363 because its 80w so I can use the stock hsf; and they can be found for really cheap.

I know they are not officially supported by dell but I have seen references that it will work online.

And would it be a feasible upgrade since the q6600 is 2.4ghz, 8mb L2, 1066fsb, 105w. The x3363 is 2.83ghz, 12mb L2, 1333 fsb and 80w.

My PCs are used for folding at home, general internet browsing, and htpc usage. I just want the most possible processing power from my old system.
post #2 of 4
Thread Starter 
forget the x3363 and x3353. I just realized it was LGA771 not 775, but the x3350,60,70,80 are all LGA775
post #3 of 4
Quote:
Originally Posted by fatphatboy88 View Post

I have an Optiplex 755 sff with the q6600 in it and Im thinking about buying a mini tower 755 with the q6600 also. I know I can upgrade to the q9650, q9550, or q9450 no problem. But what about the xeon x3350, x3360, x3370, x3380, x3353, x3363? Specifically the x3363 because its 80w so I can use the stock hsf; and they can be found for really cheap.

I know they are not officially supported by dell but I have seen references that it will work online.

And would it be a feasible upgrade since the q6600 is 2.4ghz, 8mb L2, 1066fsb, 105w. The x3363 is 2.83ghz, 12mb L2, 1333 fsb and 80w.

My PCs are used for folding at home, general internet browsing, and htpc usage. I just want the most possible processing power from my old system.
The Xeons are LGA 771 which renders them unusable on your computer, and the reality is that the xeon you want to use the x3363 is just a Q9550 in a different package. If the stock cooler can handle a 105W cpu it'll handle a 95W CPU just fine.

Basically you really dont have much choice but to get a Q9550.
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Leviathan
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CPUMotherboardGraphicsGraphics
Xeon E5-2690 Biostar TPower X79 PNY GTX 660 2GB HP GT 440 OEM 
RAMHard DriveHard DriveHard Drive
Gskill Ripjaws 4x2GB 1600mhz Seagate Barracuda 500GB Seagate Barracuda 1.5TB Western Digital Caviar Blue 640GB 
Hard DriveCoolingOSMonitor
Patriot Pyro 60GB Xigmatek Gaia Windows 7 Ultimate Acer S230HL 
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Princeton 1280x1024 19" Logitech K120 Seasonic G550 Xclio Nighthawk 
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Logitech MX310 
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post #4 of 4
While I have been unsuccessful in getting an LGA 771 Xeon CPU to be compatible with in a Dell Optiplex 755--with the use of LGA 775-to-771 adapter stickers--I was able to install Xeon E5440 CPUs in a Dell Optiplex 330: http://valid.canardpc.com/10geuz and an Optiplex 360: http://valid.canardpc.com/ez64uq

In my opinion, if the 330 and 360 can support a Xeon E5440--coupled with the fact that a Dell Optiplex 755 can support fast Core 2 Quad CPUs such as the Q9650 and Q9550--the 755 should in theory be able to support the Xeon E5450 and E5440 since they are the virtual equivalents of their C2Q counterparts. Unfortunately in reality, this does not appear to be the case. Hopefully a microcode mod is all that is needed for a 755 to support a LGA 771 Xeon. However, something tells me that it will take much more.
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