erkki82
2 Bronze

Dell e7450 bios forced memory down to 1600mhz

I think it was after bios A09 that my memory is forced to 1600mhz.

I have upgraded my memory to crucial 2x8gb 1866mhz ram BLS2K8G3N18AES4 and used to
have them running 1866mhz as they should.
It takes away a notch of graphics performance and I hope next bios update would fix this back.

I am currently with bios A10 and it has the same problem. Don't restrict people's choices of customisation. 
Otherwise I have been satisfied with my laptop, so please fix this.

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8 Replies
laserman778
3 Zinc

RE: Dell e7450 bios forced memory down to 1600mhz

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erkki82
2 Bronze

RE: Dell e7450 bios forced memory down to 1600mhz

I asume that you ment that they where never ment to support speed beyond 1600mhz.

But like I said it was supported, but then limited. It's like when having a nice warm shower and then somebody turns it only to lukewarm... Not happy. :-)

Desktop, laptop you can use higher frequency memory with no problems unless manufacturer restricts them.

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ejn63
10 Diamond

RE: Dell e7450 bios forced memory down to 1600mhz

That was once true - but most newer CPUs (including the Intel Core i and derivatives) have the memory controller onboard the CPU, not  the board itself. Whatever the system board or firmware support, it's the CPU that determines the memory speed -- not the mainboard.

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erkki82
2 Bronze

RE: Dell e7450 bios forced memory down to 1600mhz

It might be so, as I see cpu microcode update in the bios update...

That might be it,.

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ejn63
10 Diamond

RE: Dell e7450 bios forced memory down to 1600mhz

CPU microcode refers to the portion of the UEFI/BIOS that recognizes the CPU -- not the actual code built into the processor (which is not upgradeable).  Everything on the CPU is set in silicon - it cannot be changed after the CPU is built.

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erkki82
2 Bronze

RE: Dell e7450 bios forced memory down to 1600mhz

So this is still on. Bios A17

After A9 bios memory is at 1600mhz althiugt it should run 1866mhz.

Not a big deal , but not nice to do changes with performance decrease

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ejn63
10 Diamond

RE: Dell e7450 bios forced memory down to 1600mhz

The CPUs shipped with this model line maxed out at the i7-5600U, which has no support for RAM over 1600 MHz.  You can install faster RAM but the memory controller will only run at 1600.

Intel's spec:

ark.intel.com/.../Intel-Core-i7-5600U-Processor-4M-Cache-up-to-3_20-GHz

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erkki82
2 Bronze

RE: Dell e7450 bios forced memory down to 1600mhz

Yes and same with desktop i7-7820x it says 2400mhz ddr4... nobody runing faster....

Like said before. It was running happily the memory at 1866mhz up till bios a9. Heck even my parrents dell e5440 runs the memory 1866mhz so why restrict better machine

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