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18363
August 16th, 2017 00:00
Dell precision 7510 - enabling 4 CPU's from BIOS...
Hi !
According to hardware specifications of my laptop (Dell precision 7510), it should have 4 processors, but it looks like it has only two of them enabled. Oh, well, I've noticed that there exists in bios option where you can enable more processors (4 actually), and they work ok until laptop is rebooted.
After reboot default bios setting returns back (2 cpu's) and OS again is running slowly.
When saving in bios it's possible to save with "Save as custom" checkbox enabled or disabled - that option does not have any affection to cpu's enabling - wondering if it works at all.
There is also problem with Windows 7 / hibernate - it does not always work correctly - problem occurs randomly, so there is approximately 10% change that hibernate will not recover correctly.
Have anyone seen similar problems ?
DELL-Justin C
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August 18th, 2017 10:00
@Tarmopikaro,
I've seen this happen once before. It was because of a Dell Precision Optimizer profile.
Within Dell Precision Optimizer there a certain profiles you can set-up. Some profiles mandate 2 cores while some profiles mandate 4 cores. Once Dell Precision Optimizer is loaded after login, the set profile then loads, thereby potentially changing the number of cores available.
I suspect that you have 2 options:
1. Disable or uninstall Dell Precision Optimizer
or
2. Load a Dell Precision Optimizer profile that requires 4 cores
robert p
4 Operator
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9.4K Posts
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August 16th, 2017 05:00
Hi tarmopkaro,
Thanks for posting.
Here is some information you may find helpful: http://dell.to/2w177jZ
http://dell.to/2w178o3
tarmopikaro
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August 16th, 2017 06:00
Did not answer my question, but one thing which looks interesting is "Multi Core Support" - "All" should be default setting. On my laptop (with latest bios update) "2" is default setting. Not correct.
Maybe bios update corrupted it ?
jphughan
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August 16th, 2017 07:00
First, what model CPU do you have? The 7510 is available with a selection of CPUs. And second, what BIOS option are you talking about? There's usually an option for Hyper-Threading, and then there is an option to select the number of cores that are activated. That can go up to 4, assuming you do in fact have a quad-core CPU installed. When you apply the changes, the option to save as custom user settings shouldn't make any difference -- that just saves a profile that you can recall using the "Load Defaults" button if you want. But I've never heard of BIOS settings changing from one reboot to the next. Are you on the latest BIOS revision?
tarmopikaro
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August 17th, 2017 04:00
I've updated bios approximately one month ago to newest, and what I have checked now, there weren't any bios update coming lately.
tarmopikaro
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August 17th, 2017 06:00
CPU's: Intel(R) Xeon(R) CPU E3-1535M v5 @ 2.90 GHz 2.90 GHz
jphughan
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August 17th, 2017 07:00
Ok, according to ark.intel.com, that CPU has 4 cores and 8 threads, so I'm not sure why the BIOS default setting would be 2 cores (I thought those systems had an "All Cores" setting?) or why it would be reverting on reboot.
tarmopikaro
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August 18th, 2017 06:00
www.dell.com/.../DriversDetails
I had previously installed BIOS v1.12.4 (Precision_7x10_1.12.4.exe), and apparently it had some bugs which were fixed in newer version of bios.
At least it looks like 1.13.6 (Precision_7x10_1.13.6.exe) working better – it does not forget anymore configured CPU’s count during reboot, I’ll do test more on hibernate issues, if it solves them as well.
tarmopikaro
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August 20th, 2017 03:00
I have uninstalled dell precision optimizer simultaneously, so I suspect that one helped.
It's incredible that application can manage bios options, and especially there is no warning or no special message about switching to lower amount of cpu's.