Problems after RAM upgrade

Regarding CPU-Z, it reports nothing for any of the 4 slots. Just blank forms. It does give an error when I run it:

"[bInitDriver] path = C:\WINDOWS\temp
[bInitDriver] GetCurrentDirectory = C:\Program Files\CPUID\CPU-Z
[bInitDriver] GetModuleFileName = C:\Program Files\CPUID\CPU-Z\cpuz.exe
[vGetOSVersion] m_iOSVersion = 2 (10.0), SHA2 = 1
[vGetOSVersion] IsAMD64=0, IsIA64=0, IsAlpha=0, SHA2=1
[bInitDriver] Extract dir = C:\WINDOWS\temp\cpuz149\
[bInitDriver] m_szPath_2=C:\WINDOWS\temp\cpuz149\, m_szFilename=cpuz149_x64.sys
[WinNT_hCreateServiceHandle] CreateFile cpuz149 returned 2 (0x2)
[WinNT_bInstallDriver] szMachineName = DESKTOP-H659SQ8
[WinNT_bInstallDriver] OpenSCManager failed, error code = 5
[bInitDriver] bInitDriver returned 5
[WinNT_dwUninstallDriver] OpenSCManager failed, error code = 5
[vCloseDriver] CloseHandle(mutex) = 1"

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Mobo is Gigabyte B75M-D3H
BIOS is AMI

Hi,
Then take pictures of memory tags side by side of all kits you're using.

OK, will do photos.

Hi,
Do the original memory kit too.

Will take photos of the old RAM as well.

I live in South Africa, and our electricity supply commission has had equipment failures again, and they are doing load-shedding from 10 tonight until 5 tomorrow morning, so they can work on the system. My electricity is going off in 33 minutes time. I can't start reducing the filesize of the photos and getting organised to put them on DropBox or whatever and have the electricity go off halfway through a boot and my boot drive gets trashed.

I will have to continue tomorrow. I will also see if I can find out about the error message with CPU-Z, and the fact that I get no info about Menory. There might be some relationship with the problems.

Thanks everyone in the interim.

I also have a Gigabyte motherboard. You probably have a dual BIOS motherboard. The on/off/on is normal during a cold boot. If it's doing it while coming out of hibernation/sleep then I really don't have a solution. But from a cold boot it's normal.

ram1220: Yes it is Dual Boot. Never done it with me before. This morning after 5 attempts I switched off, wiggled the RAM boards, and switched on again. Booted 1st attempt.

Modern MoBo use two identical memory sticks on a mode called dual channel. Dual channel increases overall memory speed.
To work properly in Dual channel mode, memory must be identical pair, (same brand, same speed and same timings).
8G+8G will work in dual channel. 8G+8G +4G won't work in dual channel as one channel has 12G and the other has 8G.
- As already suggested, uninstall the 4G stick.
- Download hwinfo. It's a portable, don't need to install. Extract and run.
Check if both sticks has same brand, same speed and same timings.

The 2 8GBs came off the hook at the shop together. They were manufactured the same week.
HWiNFO said that the RAM was running dual channel.
Took the 4GB module out.
NovaBench RAM tests now slightly worse.

HWiNFO reports that my main data drive reports a SMART error. That could be a problem when processing a 100MB file. Will switch to backup drive.

Yesterday I switched to my backup boot drive and things seem to be better.

Now Windows is demanding to be updated. Will be up and running again in about an hour and will see how things go with all the changes.