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Performance degrades in Probook 4540s after memory upgrade
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Student
Posts: 1
Member Since: ‎12-03-2014
Message 51 of 54 (2,752 Views)

Re: Performance degrades in Probook 4540s after memory upgrade

Hi,

 

I have an HP Probook 4540s with Intel Core 15 2450M and serial C6Z91UT and integrated Intel graphics. I'm wondering if it's possible to upgrade this laptop to 16GB RAM, and which frequencies will work? Can the Probook support 1600Mhz? I read in the spec that the supported frequency is 1333Mhz so I'm confused about this. And, on another note, can the Probook 4540s support 1TB hard drives? The spec specified the limit as 750GB but I don't trust everything I read. And again (sorry for the long-winded message!) does the laptop support SATA3 (6Gb/s)? The spec, again said the laptop supports SATAII at best but the BIOS seems to imply it supports up to SATA3.

 

Thanks for your time!

Student
Posts: 1
Member Since: ‎08-02-2015
Message 52 of 54 (1,946 Views)

Re: Performance degrades in Probook 4540s after memory upgrade

I have an HP Probook 4540s with an I7 CPU and twice tried to upgrade the memory from 8gb to 16gb and both times it slowed the computer to a crawl.  This time I tried the BCDEDIT suggestion and it worked perfect !  The computer reboots faster than ever and everything works as I had hoped.  I'm not a power user per se ---- usually just Firefox and Excel opened at the same time along with Light-O-Rama when doing light show stuff --- Thanks for the help on this problem !!

Honor Student
Posts: 1
Member Since: ‎08-04-2015
Message 53 of 54 (1,919 Views)

Re: Performance degrades in Probook 4540s after memory upgrade

Thanks for this, I just upgraded my 4740s to 16GB and the CPU started churning (killing a few processes helped) had some strange graphics issues and  my external j5create stopped working, tesing it on another machine where it worked, I thought it was Address space related, and deallowcating 256MB of the 16GB to take it from 15.9 usable to 15.6 usable fixed all the issues. Shame the OS isn't clever enough to figure this out. (Windows 7)

Student
Posts: 1
Member Since: ‎09-18-2015
Message 54 of 54 (1,733 Views)

Re: Performance degrades in Probook 4540s after memory upgrade

Wow! I upgraded my 4540s (i7 8mb) with a 500gb SSD and 16gb ram. (2x8gb)  I powered it up and it was slower than ever! After doing all of the updates I could think of and playing with every setting I could think of I was about to get rid of my laptop and move on. ...until I stumbled on this thread! After following the instructions here my old laptop is super fast and I'm a very happy camper! THANK YOU!!!!!  

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