Ok mate now I am still seeing references to the memory although your tests have come up clear not wanting to sound doubting but you are using the recommended memtest and not just the Windows feature??
RAM - Test with Memtest86+
The other thing I did find was a problem device in msinfo32 namely the NVidia sound card now as I am not familiar with that device as NVidia spells graphics to me just what model is the card please? Just for the record it looks to be made by a brand called Via?? see pic.
Now as strange as it may seem I would like to see the results for the rail voltages on the PSU because very often that device is overlooked as a cause for problems in the machines. That is that if the PSU is not working as required then it follows that the rest of the machine is not getting the correct power supply (volts) and that can lead to non function to damage to the other components insomuch that there are components that operate within very tight voltage tolerances. So please bear with me it may turn out to be ok and then we can progress from there.
Using HW Info
PART A:
You can test the volts on the PSU with HW Info HWiNFO, HWiNFO32/64 - Download < download the right bit version and close the right hand window select Sensors and scroll down to the power section where you will see what the volts are doing see my pic. In my pic the section (Nuvoton) with VBATT as a dead give away you are in the section for the rail voltages. There are other section titles and one that pops up often is ITE (sometimes the usual one for Gigabyte boards)
Now the voltage on the different rails have to be within 5% =+/- of what is required or the machine will not work properly if at all.
Limits +/- (minimum - correct - maximum)
12v1 = 11.4 - 12 - 12.6v
12v2 = 11.4 - 12- 12.6v
5v = 4.75 – 5 - 5.25v
3.3v = 3.135 – 3 – 3.465v
-12v = -10.80 - -12 - -13.20v
+5VSB = 4.75 – 5 - 5.25v
The Power good signal voltage at pin 8 on the 24 pin plug (grey cable) should be the same as the 5v rail reading/s
See this for the rail voltage info
PSUs 101: A Detailed Look Into Power Supplies (Section 2.)
The original right hand window shows the machine running and is handy for that but for looking at the components in some detail close it and use the main left hand side panel
FOR OTHER COMPONENTS
PART B:
Open each small square with + in it on the section the components are in and then click on the individual component/s (it will highlight in blue) - in the right hand side will appear all sorts of details including brands speeds and other essential info that particular device. See pic for example.
Plus you could use PART B: to find the exact brand and model of that sound card
