New RAM speeds at 2133mhz while the last one the prebuilt had was running at 2666mhz

[Vlach0o]

Hello so i just upgraded my desktop with Corsair Desktop RAM Vengeance LPX 16GB Kit 3200MHz DDR4 but my pc runs it at 2133mhz and i dont understand why i cant edit it from the  BIOS hp utility settings and why cant it run at least at the 2666mhz that the last ram was running at can someone please help or hp fix this thing with your bios this is dumb.

[BeemerBiker]

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@Vlach0o wrote:

Hello so i just upgraded my desktop with Corsair Desktop RAM Vengeance LPX 16GB Kit 3200MHz DDR4 but my pc runs it at 2133mhz and i dont understand why i cant edit it from the  BIOS hp utility settings and why cant it run at least at the 2666mhz that the last ram was running at can someone please help or hp fix this thing with your bios this is dumb.

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Did you replace a single 8gb with that pair of LPX Corsair?  If so, the following warning quote: "Maximum supported memory speed may be lower when populating multiple DIMMs per channel on products that support multiple memory channels."

For what is is worth, if you had a single stick running at 2666 and replaced with a pair running at 2133 then basically that pair is running at effective 4266 since the memory is accesses concurrently.

That does not excuse the inability to bring up a BIOS advanced mode and enable various XMP features for different memory.

DDR4-3200 memory can have different timing due manufacturer using chips from different manufacturers.   The motherboard is designed an tested using memory that may not even be availably a year or two later.

[Vlach0o]

yea the ram i had was just one slot with 8gb of ram running at 2666, so because my motherboard supports only 2666mhz the two slots will run at 2133 each?

[BeemerBiker]

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@Vlach0o wrote:

yea the ram i had was just one slot with 8gb of ram running at 2666, so because my motherboard supports only 2666mhz the two slots will run at 2133 each?

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2133 is the fallback speed when the bios has problems identifying the memory

Possibly, and this is a guess, if you had bought a memory stick exactly identical to the 8GB you had, then both MIGHT HAVE run at 2666.

Even though you are running at 2133 the pair of memory sticks double the thruput to to the CPU since a pair of 64 bit words are fetched at once 

https://www.crucial.com/articles/about-memory/what-is-dual-channel-memory

HP is not the only OEM having this problem.

Since you have a Ryzen, you might try the Ryzen master to overclock the memory.

https://www.amd.com/en/technologies/ryzen-master