Windows 10 64bit 8GB RAM installed 3.98GB usable?

[ponder]

Not sure if it applies to your cpu, certain early x64 amd cpu had support for 64 bit instruction sets but did not have support for virtual memory extensions for above 4gb, consumer ddr400 boards at the time supported 4 x 1gb ram at most.

I did a clean win10 64bit install for the person beginning of the year and it had full 8GB usage back then

 

[Aghori]

Roaches in your mainboard. I had the same issue but a can of Doom sorted it nicely.

Check your BIOS configuration (Some boards have weird support configurations). Could also be a faulty ram module.

 

[ponder]

1. Reseat the RAM
2. Check BIOS settings
3. msconfig > Boot, select the OS and hit advanced, check what your maximum memory is set to, should be unticked.

What does your display in dxdiag say?

None of those 3 things helped.







Bios sees two sticks but single channel.

 

[quovadis]

Bios sees two sticks but single channel.

Try using slots A2 and B1...

 

[ponder]

Try using slots A2 and B1...

The asrock 970 extreme3 r2.0 manual specifically stated to use a1/b1 and a2/b2

ASRock > 970 Extreme3 R2.0

Supports ASRock DuraCap, Digi Power; Supports AM3+ Processor, 8-Core CPU; Supports Dual Channel DDR3 2100(OC); 2 x PCIe 2.0 x16 Slots, Support AMD Quad CrossFireX™ and CrossFireX™; 4 x USB 3.1 Gen1 (2 Front, 2 Rear), 5 x SATA3, 1 x eSATA3; Supports XFast 555, X-Boost, Fast Boot, Restart to UEFI...

www.asrock.com

 

[ponder]

Windows 10 memory diagnostics also came up clear.

 

[ponder]

I've moved the dimms from slots a2/b2 to a1/b1 and reset the bios but still no joy...

Busy downloading puppy linux 64bit just check if it will see all 8gb

 

[quovadis]

The asrock 970 extreme3 r2.0 manual specifically stated to use a1/b1 and a2/b2

ASRock > 970 Extreme3 R2.0

Supports ASRock DuraCap, Digi Power; Supports AM3+ Processor, 8-Core CPU; Supports Dual Channel DDR3 2100(OC); 2 x PCIe 2.0 x16 Slots, Support AMD Quad CrossFireX™ and CrossFireX™; 4 x USB 3.1 Gen1 (2 Front, 2 Rear), 5 x SATA3, 1 x eSATA3; Supports XFast 555, X-Boost, Fast Boot, Restart to UEFI...

www.asrock.com

Try it

 

[mercurial]

Maybe it's a Windows 10 bug

 

[ponder]

Try it

I'll give it another bash tomorrow.

I'll also boot it from a linux usb stick tomorrow.

I'm beginning to think this is a win10 issue...

 

[mercurial]

I'll give it another bash tomorrow.

I'll also boot it from a linux usb stick tomorrow.

I'm beginning to think this is a win10 issue...

This was my thinking as well.

 

[Immy]

While your at it, check how much Windows reports usable if you take out one DIMM(4GB total).

 

[|tera|]

While your at it, check how much Windows reports usable if you take out one DIMM(4GB total).

Testing one dimm at a time per slot would be good too. To verify all slots are working.

 

[itareanlnotani]

I suspect bios issues.

#1 - Try move sticks to A1 /A2 or A1 / B1 (see if bios shows dual channel or not).
#2 - Check if any bios update available.
#3 - Check in Linux to see if it see's 8G usable.
- If good, then its windows, try a diff build. Maybe you have PAE enabled or something.

 

[Rocket-Boy]

AMD Athlon!?!?
Wow Im not even sure PC's with 8GB of ram were a thing in those days.
Unless of course the newer CPU's are also labelled Athlon?

 

[ponder]

While your at it, check how much Windows reports usable if you take out one DIMM(4GB total).

4gb

 

[ponder]

I suspect bios issues.

#1 - Try move sticks to A1 /A2 or A1 / B1 (see if bios shows dual channel or not).
#2 - Check if any bios update available.
#3 - Check in Linux to see if it see's 8G usable.
- If good, then its windows, try a diff build. Maybe you have PAE enabled or something.

I tried one dimm at a time in each slot, each dimm works on its own in every slot.

Linux 64bit also only sees 4gb with both films plugged in.

Pc is on a ups so I'll look for a newer bios next.

Anybody know if the memory controller resides in the cpu or if it's part of the MB chooser? Thinking of reseating the cpu as well but forgot to bring thermal paste with me.

 

[ponder]

Flashed the bios to latest available version and still no change. Bios still says single channel and only 3.98gb available in windows...

 

[Immy]

I would also test with a 8GB+ module, if you can possibly get one somewhere.

 

[DarkDragon]

In task manager under performance and memory what does it say under hardware reserved?