Performance degrades in Probook s 4540 after upgrade memory

Hello. I installed recently in my memory modules two Kingston Probook4540 (2x8gb ddr3 1600 CL10 240 pins). Since I did this, Windows 8 is much longer to start and performance dropped considerably. But, if I put only one of the two modules, or the original 4 GB module, Windows runs at normal speed.

I think it's a BIOS problem, as I see this error even on laptops the other brand, for example here
http://superuser.com/questions/379970/laptop-is-incredibly-slow-after-RAM-upgrade

I have the latest BIOS version available (F31 26-SEP-2012).

Thank you.

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In case anyone is still interested in this topic:

It is a solution that worked for me.

It is not an official solution or supported.

I used the laptop intensively in the described configuration and had no problems that I can relate to the configuration of the memory.

Deduct from a 256 MB RAM memory available for OS could eliminate the problem for some processors.

The solution runs on:
-HP 4540S

-i5 - 2450M

-AMD/Intel switchable graphics card

-16 GB OF RAM

-Bios F.42

It might work for other processors.

Under Windows, you should deduct 256 MB of RAM, using EasyBCD or a similar tool.

Instructions for EasyBCD:

Under Advanced settings/developer set 256 under "MiB deducted from physical memory", save the settings and reboot.

In Linux, the "mem = 17G" value in the boot of the kernel settings (actually deducted 256 MB).

Edit:

On Windows 7 and later versions, you can also use the following instead of EasyBCD:

bcdedit/set {current} removememory 256

(Run the command at the prompt with administrator privileges and restart).

Tags: HP Desktops

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