He said Dell Optiplex GX620 in title. No it will nto work, since yuour MB only supports up to a 8000MHz FSB. If you bought a Core2 Duo, you would need a board that does 1066 or 1333 FSB. At least you have to upgrade the motherboard as well, try to find dell optiplex 750, 755, 760 motherboards, they can hande Core 2 Duo and they seem in. Released in 2005, the Dell OptiPlex GX620 was a business-class computer that came with a variety of processor options, including 64-bit systems. Although the chasis was available in four different designs, each had a GX620 motherboard inside.
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Documents
Tools
These are some common tools used to work on this device. You might not need every tool for every procedure.
Troubleshooting
Having trouble? Check out our tips on our troubleshooting page.
Background and Identification
Dell Optiplex Gx620 Cpu
The Dell Optiplex GX620 is part of a line of desktop computers that were designed for those in the the government, corporations, and for students in educational environments. The Dell Optiplex series shipped out with Intel processors that started with the pentium chip and even still today they are being shipped out with higher end chips like the Core i7. There are more than one form factor that can be identified as a Dell Optiplex GX620, these range from the computer we disassembled which is the Mini-Tower to the Ultra Small Form Factor. You can also see the model of the computer by it's 'name tag' that is located at the top corner of an upright tower. We chose to do the Mini-Tower which is denoted by its size.
Tower Dimensions
Dell Optiplex Gx620 User Manual
Mini Tower:
Dell Optiplex Gx620 Motherboard Manual
H: 16.20'
W: 7.40'
Dell Optiplex Gx620 User Manual Pdf
D: 17.00'
Desktop:
H: 4.50'
W: 15.59'
D: 13.69'
Small Form Factor:
H: 3.65'
W: 12.45'
D: 13.40'
Ultra Small Form Factor:
H: 10.30'
W: 3.50'
D: 9.95'
We will be focusing on the 'Mini Tower' form factor in these replacement guides.
Additional Information
Dell Optiplex Gx620 Sff Motherboard Specs
For more information to repair this desktop and the Dell Optiplex Series
I just bought from a very reputable computer shop 2 sticks of Kingston 2GB 667Mhz ram.
Based on documentation (https://www.techwalla.com/articles/dell-optiplex-gx620-motherboard-specs), it is capable of running on 4GB ram at 667Mhz, so I'm not overloading it. When I try to start up my PC, it just makes long loud beeps until I power it back off. I made sure that they are alternated in opposite slots 1 & 2, not next to each other.
According to the Desktop manual, the front numbers that I see displayed (lights 1 & 3) indicate 'Memory modules are detected, but a memory configuration or compatibility error exists.'
If I'm installing the correct memory, why am I experiencing this error? Any help would be appreciated.