doobeez

Try using only the original 1.5gb RAM, does the GX520 start without any errors?

If it does, then the new 1gb module could be not compatible with the GX520.

Bev. 

Hi the original 1.5 gb works absolutely fine, the guy who sent me the ram assures me it is compatible the info on the sticker on the module says:

1GB 1Rx8 PC2-5300U-555-12-ZZ

Made in China M378T2863DZS-CE6  0746

Does anyone know if this is compatble with my optilex gx520 or not? because the guy tells me it is and if it's not then he still owes me some ram. Thanks for helping me on this.

doobeez

Then it would appear that the 'new' 1gb module is not compatible.

There are basically four reasons, why memory does not work (1) RAM not compatible to the computer (2) Faulty RAM (3) Bad memory slot [rare] (4) RAM not installed correctly.
            
Bev.

Thanks Bev, is there any way to find out if it is a compatability problem?

Hello doobeez, Can you remove all the original memory and install just the module you got from your friend and see if the system will boot?

If so, it would suggest this memory module is not compatible with the original memory.

If the system will not boot with the friend's memory, either it is defective or not compatible with your system.

Hope this helps.

Hi i tried taking the original ram out and just putting the new module in, and it still didn't work i got the same beeping noise, i tried the new module in bothe slots, so i assume it's that the ram is not compatible with my coputer at all right? I've checked the event log and i have this : "post error memory size different"

doobeez

Yes, the memory is NOT compatible with your computer, now you need to convince the vendor you purchased the computer from.

Bev.