[SOLVED] Can't run memory at 3200MHz - Ryzen 7 3700X

Jan 17, 2020
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Hi All,

Hoping someone can help.

I have an MSI Mag Mortar B550M with a Ryzen 3700X.
I purchased Corsair Vengeance 4x16GB 64GB 3200MHz.

I noticed the RAM was only running at 2133MHz initially. Did a bit of searching and saw I might have to enable some profiles in bios and possibly tweak some settings.
So I've enabled an "A-XMP" profile. Upped the voltage to 1.35v - however the highest I can get it to run is 2933MHz. Any higher and I get an error.





Questions -

Is there anything else I can do to get it to run at the advertised clock speed?
Am I going to notice any difference between 2933MHz and 3200MHz?
Is running at 1.35v safe?
Should I return this and buy different memory?
Why is all memory not just compatible and run at the designated speed in the first place?

Thanks!
 
Reactions: bujinkanrn
Jan 17, 2020
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So I turned my PC on yesterday and it wouldn't post at 1.35V @ 2933MHz. Upped it to 1.4V and it did.

So rather than faff about and potentially have it not boot up randomly on occasion, I've just ended up buying the 2x32GB 3200MHz instead. Found a store that had it for the same price as I bought the 4x16GB for.

Also turns out it has the same timings as the 4x16GB after all, I must have got mixed up.

Now successfully booting at 3200MHz @ 1.35V!
 
Jan 17, 2020
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I've actually discovered it's not on the QVL list. There was one character difference in the product ID.

Looks like 3000MHz 4x16GB version is listed.
As is the 3200MHz 2x32GB.

But no 3200MHz 4x16GB..
 
When running 4 dimms higher frequencies can be harder to achieve as the memory controller is under more load, it’s best to use 2 dimms. However you can try upping the voltage further. Depending on the reviewers opinion the max safe voltage quoted by overclockers is 1.45 or 1.50v. There is no hard rule for what is safe, it’s a view of the reviewer based on their appetite for risk. However if me I’d be happy to try anything up to 1.45v, you may find somewhere between 1.35-1.45 that is stable without needing 1.45v.
 
Jan 17, 2020
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When running 4 dimms higher frequencies can be harder to achieve as the memory controller is under more load, it’s best to use 2 dimms. However you can try upping the voltage further. Depending on the reviewers opinion the max safe voltage quoted by overclockers is 1.45 or 1.50v. There is no hard rule for what is safe, it’s a view of the reviewer based on their appetite for risk. However if me I’d be happy to try anything up to 1.45v, you may find somewhere between 1.35-1.45 that is stable without needing 1.45v.
That makes sense. I didn't go for the 2x32GB Corsair Vengeance LPX 3200MHz because it had slower timings and was also £30 more expensive. I don't plan on ever going to 128GB with this machine so stuck with the 4x16GB.
 
Jan 17, 2020
9
1
20
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So I turned my PC on yesterday and it wouldn't post at 1.35V @ 2933MHz. Upped it to 1.4V and it did.

So rather than faff about and potentially have it not boot up randomly on occasion, I've just ended up buying the 2x32GB 3200MHz instead. Found a store that had it for the same price as I bought the 4x16GB for.

Also turns out it has the same timings as the 4x16GB after all, I must have got mixed up.

Now successfully booting at 3200MHz @ 1.35V!
 
Aug 22, 2020
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it's not uncommon to achieve higher speeds and tighter timings with 2 sticks vs 4 sticks

not all motherboard and ram combinations will achieve the speed advertised on the ram

that speed is achievable in some system the vendor used for testing, but no necessarily your motherboard. check the memory QVL on the motherboard support website
 

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