CPU Change For Dell Optiplex 755 MiniTower

[oreyes1222]

Good Day Friendly People, I am wanting to upgrade the CPU that's currently in my dell Optiplex 755 Mini tower. I did some research to see which ones are compatible and found some. I am debating whether or not to get the Intel Core 2 Extreme QX6800 LGA775 2.93 GHz Quad-Core CPU Processor or the Intel Core 2 Quad Q9650 Processor 3.0 GHz 12 MB Cache Socket LGA775. I am still iffy on the Intel Core 2 Extreme because it might not fit, that's why I am asking here. If I have to make a Bios update can you guys tell me how to do it and preferably I don't want to update bios to avoid the hassle, but if I have to then so be it. If there are any more CPU's that are better than the ones I posted please feel free to show me, I am looking for a CPU that can make a big improvement on playing my racing games, my main concern is if they are compatible and if a bios update is needed. My budget is no higher than $100. Below is the information on my Mini Tower. All help is appreciated, thank you.
http://
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https://ibb.co/Vwxtmk3

 

[mgallo848]

Keep in mind, Just because it has the same socket does not mean every CPU will be compatible. The two you listed have different bus speeds. You motherboard may or may not work with them.

Is this your PC? https://www.cnet.com/products/dell-optiplex-755-mini-tower-celeron-m-440-1-86ghz-512mb-ram-80gb-hdd-xp-home-series/

 

[oreyes1222]

yes that is my pc

 

[mgallo848]

From what I can find, these are the only 2 quad core CPU's that will work:

Intel Core 2 Quad Q6700 Processor (2.66GHz, 8MB L2 cache, 1066MHz FSB, VT)
Intel Core 2 Quad Q6600 Processor (2.4GHz, 8MB L2 cache, 1066MHz FSB, VT)

Info found here (On page 10): https://www.dell.com/downloads/global/products/optix/en/opti_755_techspecs.pdf

(You may have to update your BIOS before installing the new CPU)

 

[oreyes1222]

Out of those two which one is better? And what about the ones that I posted. Ive seen videos were the CPU I posted above worked on the Dell Optiplex I had.

 

[mgallo848]

1: The Q6700 is better. It is also 100% compatible.
2: The other CPU's are a complete gamble. They may or may not work. My guess is they won't.

 

[oreyes1222]

Thank You for the help I really appreciate it. The Q6700 it is!!

 

[muhammadsamimhassan]

Keep in mind, Just because it has the same socket does not mean every CPU will be compatible. The two you listed have different bus speeds. You motherboard may or may not work with them.

Is this your PC? https://www.cnet.com/products/dell-optiplex-755-mini-tower-celeron-m-440-1-86ghz-512mb-ram-80gb-hdd-xp-home-series/

From what I can find, these are the only 2 quad core CPU's that will work:

Intel Core 2 Quad Q6700 Processor (2.66GHz, 8MB L2 cache, 1066MHz FSB, VT)
Intel Core 2 Quad Q6600 Processor (2.4GHz, 8MB L2 cache, 1066MHz FSB, VT)

Info found here (On page 10): https://www.dell.com/downloads/global/products/optix/en/opti_755_techspecs.pdf

(You may have to update your BIOS before installing the new CPU)

I've a Dell Optiplex 755 as well so I think I can speak with some authority here. And the truth of the matter is; I'm running a Core 2 Duo E8400 with an FSB of 1333MT/s!

How come, you ask?

Well, the 755 has a Q35 Express southbridge chip which supports ALL bus frequencies (800/1066/1333) so all x86 Core processors are supported. About the only LGA775 processors it doesn't support are old Pentium 4 based Netburst Processors so you're misleading The OP here, I'm afraid.

Thank You for the help I really appreciate it. The Q6700 it is!!

Don't go with 6700. Go all the way to Q9650. Just don't forget to update your BIOS to revision A22.

 

[oreyes1222]

Keep in mind, Just because it has the same socket does not mean every CPU will be compatible. The two you listed have different bus speeds. You motherboard may or may not work with them.

Is this your PC? https://www.cnet.com/products/dell-optiplex-755-mini-tower-celeron-m-440-1-86ghz-512mb-ram-80gb-hdd-xp-home-series/

From what I can find, these are the only 2 quad core CPU's that will work:

Intel Core 2 Quad Q6700 Processor (2.66GHz, 8MB L2 cache, 1066MHz FSB, VT)
Intel Core 2 Quad Q6600 Processor (2.4GHz, 8MB L2 cache, 1066MHz FSB, VT)

Info found here (On page 10): https://www.dell.com/downloads/global/products/optix/en/opti_755_techspecs.pdf

(You may have to update your BIOS before installing the new CPU)

I've a Dell Optiplex 755 as well so I think I can speak with some authority here. And the truth of the matter is; I'm running a Core 2 Duo E8400 with an FSB of 1333MT/s!

How come, you ask?

Well, the 755 has a Q35 Express southbridge chip which supports ALL bus frequencies (800/1066/1333) so all x86 Core processors are supported. About the only LGA775 processors it doesn't support are old Pentium 4 based Netburst Processors so you're misleading The OP here, I'm afraid.

Thank You for the help I really appreciate it. The Q6700 it is!!

Don't go with 6700. Go all the way to Q9650. Just don't forget to update your BIOS to revision A22.

Thank you for the suggestion. Is that the best one for my money. Or can it go higher? How do I update Bios too, I will need some help with that, thank you.

 

[oreyes1222]

I found Two of the same what are the differences?
https://www.amazon.com/ask/questions/Tx2A9S52SK02R3P/ref=ask_ql_ql_al_hza

https://www.amazon.com/gp/product/B001D86S3G/ref=ask_ql_qh_dp_hza

 

[william p]

As you can see here the Q9650 is the best for that. The QX6800 won't run due to a 130W TDP rating. That system has a 95W CPU limit.
https://www.userbenchmark.com/System/Dell-OptiPlex-755/3939