I have Dell Optiplex 7010 PC with 4g pc3-12800u installed RAM, I tried to install pc3l-12800e ram, but the pc not booting and power button blink 3 then 5 times. So what's the issue? And in general can i install pc3l-12800e RAM instead of pc3-12800u.
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You're trying to add ECC Low Voltage RAM to a machine designed to take standard voltage Unbuffered RAM.
This is unlikely to work.
L = Low voltage
E = ECC
U = Unbuffered
See Wikipedia - DDR3 SDRAM/Variants for more detail.
If you are uncertain as to what RAM you need, don't guess. Use an online RAM configurator. See How to find which RAM to get for my computer? for examples.
Tetsujin
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