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520

August 29th, 2018 08:00

790, upgraded ram, CPU running at a 100%

so i just upgraded my optiplex 790 from 8GB DDR3 665mhz to 16GB DDR3 1333mhz and now my cpu is allways running at a 100%, sometimes it hangs and then restarts.Before the upgrade it ran at 50% or less. if any one could help me

8 Wizard

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17K Posts

August 29th, 2018 10:00

What version of Windows?

How does long test of ePSA do?

Create a Passmark MemTest86.com USB. Boot it and run long test. Should get 2 full/long passes with 0 errors.

8 Wizard

 • 

17K Posts

August 29th, 2018 10:00


@babarsoun wrote:

optiplex 790 from

8GB DDR3 665mhz to 16GB DDR3 1333mhz 


Wait a minute. That does sound right. New ram must be compatible (ie.,  very close to old ram).

Also, there are rules against mixing DIMMs.

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