Installed 32GB of 2666MHz ram in my dell xps 15 9560 but bios shows it as 2400MHz - General Hardware - Laptop - Dell Community

Installed 32GB of 2666MHz ram in my dell xps 15 9560 but bios shows it as 2400MHz

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Installed 32GB of 2666MHz ram in my dell xps 15 9560 but bios shows it as 2400MHz

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I just installed 32GB of the 2666MHz ram found from the official Dell Upgrade site and when I booted to bios it showed that my ram was 2400MHz. Is this normal and it just shows 2400 but performs as 2666 or is there something wrong

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  • The memory controller is aboard the CPU - the memory speed is set by the CPU itself.  What model CPU do you have?

  • The Kaby Lake Intel Core i5 7300HQ

  • Is there any way for me to upgrade the CPU

  • Not without replacing the mainboard - to which it is soldered.  And that will cost you likely over $400 just for the part - and will void your warranty.

  • Well that stinks

  • Which RAM?

    Userbenchmark shows certain good scores with XPS 15 9550 i7 and G.SKILL 2667 2x16GB RAM.

    Most claim though that 2400 is the max that 9550/9560 will do. No idea if a hack is involved above. The processor and the RAM negotiate the clock and the latencies automatically, you can only see the outcome (check BIOS, CPU-Z, Userbenchmark). Mind RAM may run faster also at 2400 if it works with a lower latency. And that while faster RAM will produce the expected advantage in specific benchmarks and with particular RAM-intensive programs, but the overall performance is likely to improve by less than a percent, unlike going from a HDD to an SSD which is sensed by anyone, so there are likely better ways of spending money than on "premium" RAM.  

  • I got the ram from Crucial which was recommended by dell for the XPS 15 9560 - direct ram  link here: www.crucial.com/.../CT9926179 , dell upgrade compatibility site here: www.crucial.com/.../xps-15-(9560)

  • www.crucial.com/.../xps-15-(9560) - the list of compatible ram

    www.crucial.com/.../CT9926179 - ram I bought

  • www.crucial.com/.../CT9926179 - link to my ram

  • The i5-7300U maxes out at 2133 with DDR4 or 1866 with DDR3.

    ark.intel.com/.../Intel-Core-i5-7300U-Processor-3M-Cache-up-to-3_50-GHz