Question Pc does not work new RAM

GhostHUN20

Prominent
Sep 25, 2019
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So I already had 2x8 GB ram 3000mhz I bought additional 2x8 3000mhz, installed them pc starts but monitor does not and CPU light on motherboard is on.
What is the issue how can I solve it?
Ram - LPX 3000mhz
Mobo - 450 tomahawk max
CPU 3700x
Any ideas?
 
Easiest way - return your new ram and get 2x16GB kit instead.

More complicated way - you basically have to do manual ram overclocking.
Find out valid spd values. You can use CPU-Z for that.
Input values into BIOS manually.
Set DDR voltage to 1.35V.
Set command rate to 2T. This is required for 4 module configuration.
Start with ram frequency at 2133mhz. Test it.
Increase frequency to 2400mhz, 2666mhz,2933mhz,3000mhz (test after each step).
When test fails, then go to previous settings.
 
Last edited:

Endre

Respectable
Apr 30, 2019
763
143
2,090
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So I already had 2x8 GB ram 3000mhz I bought additional 2x8 3000mhz, installed them pc starts but monitor does not and CPU light on motherboard is on.
What is the issue how can I solve it?
Ram - LPX 3000mhz
Mobo - 450 tomahawk max
CPU 3700x
Any ideas?
Before doing other things, please try these steps:

  1. Turn off PC/
  2. Remove cables/
  3. Open the PC case/
  4. Remove the BIOS battery/
  5. Re-insert the BIOS battery/
(This will reset the CMOS of your motherboard).
6. Turn on PC.

If it works, you got lucky.
If it doesn’t work, you could sell your RAM, and buy a kit of 2 x 16GB, or a kit of 4 x 8GB.
 

dorsai

Distinguished
So I already had 2x8 GB ram 3000mhz I bought additional 2x8 3000mhz, installed them pc starts but monitor does not and CPU light on motherboard is on.
What is the issue how can I solve it?
Ram - LPX 3000mhz
Mobo - 450 tomahawk max
CPU 3700x
Any ideas?

Pull the new ram out.

Restart the PC and hit the DEL key to access the BIOS while booting. Go into the BIOS and turn OFF the memory XMP profile so the ram runs at default speed (likely 2133mhz).

Assuming the system boots fine shut down, install the new ram, restart. If everything is OK at the default 2133 speed you'll likely need to access the BIOS and boost the ram voltage to get the 4 sticks working at 3000mhz. If the default voltage is 1.20v set it to 1.25v and try it. If default is 1.35v then try 1.375v...if it works at the higher voltage then go back in and try it with XMP on. You should not exceed 1.4v as it may damage the memory.

If it still wont work with a bump in voltage then I would return the ram and buy a 2x16 matched kit.
 

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