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Asrock b450 pro4 - Ram stuck at 2133mhz
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Ray62 View Drop Down
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A combination with incorrect DRAM initialization?
You should always use XMP 2.0 Profile, DRAM Profile on AUTO and select DRAM Frequency.
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Originally posted by Ray62 Ray62 wrote:

A combination with incorrect DRAM initialization?
You should always use XMP 2.0 Profile, DRAM Profile on AUTO and select DRAM Frequency.

Nothing works. I tried another ram (lpx corsair 3000 mhz) and i have the same problem. I really dont know what to do.
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Originally posted by Kururu303 Kururu303 wrote:

I tried only one ram stick in A2 and in this way i can enable the XMP (3200 mhz) but then if i put the second stick in b2, the problem returns. Is the problem in mobo or in the cpu?

What about using one stick in B2?
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Originally posted by Ray62 Ray62 wrote:

Originally posted by Kururu303 Kururu303 wrote:

I tried only one ram stick in A2 and in this way i can enable the XMP (3200 mhz) but then if i put the second stick in b2, the problem returns. Is the problem in mobo or in the cpu?

What about using one stick in B2?

I tried and pc doesnt boot (loop). Same with B1.
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whatever stick works fine in A2 at it's rated speed? .. and once you add the 2nd stick, then fail?

Do you have another Ryzen cpu you could use to test?
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Originally posted by ThreeDee ThreeDee wrote:

whatever stick works fine in A2 at it's rated speed? .. and once you add the 2nd stick, then fail?

Do you have another Ryzen cpu you could use to test?

Yes, sticks works fine in A2 but if i add the second in B2 the bios reset and speed return to 2133mhz. Unfortunately i dont have another cpu.
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just something to check .. but make sure there isn't any foreign material in any of the ram slots ..ie .. packing material .. small piece of paper or something.

Could possibly have a bad ram slot .. but hard to say for sure without swapping out components unfortunately .. or put your parts into someone elses AM4 setup
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Originally posted by ThreeDee ThreeDee wrote:

just something to check .. but make sure there isn't any foreign material in any of the ram slots ..ie .. packing material .. small piece of paper or something.

Could possibly have a bad ram slot .. but hard to say for sure without swapping out components unfortunately .. or put your parts into someone elses AM4 setup

I use a windows tool to test slots and i dont found errors. Is there a way to test cpu?
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Good morning.

It looks like the B channel has a tick, just running at lower frequency.

I would check the CPU and the socket for it (contacts) and the ram slots like ThreeDee posted.

A test of the CPU in another known good AM4 board and/or another known good CPU with your board would be helpfull.

A good repair shop should be able to do that for a small fee.
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I have Patriot Viper 4 PV416G320C6K (red, non-rgb Viper 4) and it runs 100% stable with XMP profile 3200Mhz CL16, even when AsRock's QVL list claims it runs stable only at 2933Mhz. Mine has Hynix C.

I have Asrock B450M Pro4 with 3.30 Bios and Ryzen 5 2600.

Try to use my timings (sorry for the bad photos, but hopefully you have everything in the same order). https://imgur.com/a/lvq3RG6

I doubt it will help though, sounds like your motherboard is bad, or something is wrong with the CPU's memory controller.
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