DELL OPTIPLEX 755 CPU UPGRADE fail

[pkrplyr67]

I installed the INTEL CORE 2 EXTREME

( supposedly QUAD CORE ) Q6700 2.66GHz 1033 MHz cpu in my DELL OPTIPLEX 755. Upgradeing my INTEL CORE2 DUO 2.66 cpu. ( lined up same way in socket LGA 775 ).

I turne on computer and immedietly get error.------ SYSTEM HALTED.

ALERT! INCOMPATIBLE CPU DETECTED.

AM I SUPPOSE TO PUT SOME CONVERSION STICKER ON IT OR WHAT??

PLEASE HELP

 

[willordoblades130]

DELL™ optipLEx™ 755 - Here's the guide
PDF-https://www.google.com/url?sa=t&source=web&rct=j&url=https://www.dell.com/downloads/global/products/optix/en/opti_755_techspecs.pdf&ved=2ahUKEwificzU2qPeAhUNWCsKHfcbD7gQFjABegQIBxAB&usg=AOvVaw0u3nEo0wfVt2dxPmalYFeR

Download it & Go to page 10 (Processor)

 

[Phillip Corcoran]

The motherboard most likely needs a BIOS update to make that CPU compatible -- check Dell's website for latest BIOS for your Dell PC model.
You'll need to put the original CPU back in order to update the BIOS.

If latest BIOS doesn't fix the problem then it usually means that the new CPU is not compatible with the motherboard --- just because the CPU has the same socket type as the old one doesn't necessarily mean it's compatible with that motherboard.

 

[jaslion]

I installed the INTEL CORE 2 EXTREME

( supposedly QUAD CORE ) Q6700 2.66GHz 1033 MHz cpu in my DELL OPTIPLEX 755. Upgradeing my INTEL CORE2 DUO 2.66 cpu. ( lined up same way in socket LGA 775 ).

I turne on computer and immedietly get error.------ SYSTEM HALTED.

ALERT! INCOMPATIBLE CPU DETECTED.

AM I SUPPOSE TO PUT SOME CONVERSION STICKER ON IT OR WHAT??

PLEASE HELP

The Q6700 is supposed to work on the latest bios so this most likely means you still have an older version on the board. Update it and you should be good to go.

 

[pkrplyr67]

thanks guys.. I said screw it and am updating whole system to a msi z170a krait gaming ddr4 mb and an intel core i3 6100.

 

[chemmajorp53]

Why are you buying an overclocking board with an i3 6100?

 

[jaslion]

thanks guys.. I said screw it and am updating whole system to a msi z170a krait gaming ddr4 mb and an intel core i3 6100.

Why buy an old i3?

 

[william p]

The Opti 755 has a 95W CPU limit. The Core 2 Extremes are all 130W. Only the 85W 2 core X6800 might run.
A Q6700 should run. A QX6700 won't.
Here are the builds for that system.
https://www.userbenchmark.com/System/Dell-OptiPlex-755/3939
Q9650 is as good as it gets, and Q9550 is a cost effective option.