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only 8gb ram of 16gb usable half of the ram is hardware reserved even after formatting

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Retrorockit said:
Some low end WIN7 versions have an 8GB RAM limit. An older low end system might have this.

www.zdnet.com

Max memory limits for 64-bit Windows 7

While the maximum RAM limit for 32-bit Windows 7 editions is 4GB, when it comes to 64-bit editions, the amount of memory that the OS can address depends on which edition you are running.
www.zdnet.com www.zdnet.com

The other possibility is that the CPU needs 4 RAM modules to address 16GB. Older hardware may not be able to use RAM module sizes that didn't exist yet.
I would go to Userbenchmark.com and see if any others are getting 16GB on that MB. If you run your sytem there it will be put in with other similar systems.

Click to expand...
if there was a limit my ram would be always 8 usable but it was always 16 before sometimes it changed to 8 but it was because of voltage then i fixed it
 
Last edited:
hello

please install AIDA64, and find the memory stick details from there and post them here.

This issue can be caused by memory mismatch. I got the same thing in my system since i have different sticks with different timings.
If this is the issue, the way to solve it is quite advanced and requires setting the mem timings in BIOS to the higher values out of all the memory sticks you have.
 
OneMoar said:
need SPD slot2
the fact that you are in single channel when you have two sticks immediately tells me there is something wrong with the memory kit or the kit is not compatible with the board
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A good point. On normal cases that would be impossible.

Andy Shiekh said:
How easy is it to damage RAM through over-voltage?

Or static, although that may be harder
Can static KILL your PC? (ft. Electroboom) - YouTube
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Maybe with some true OC, dunno... haven't managed to do that yet but I still use "safe" range on my RAM :D
 
de.das.dude said:
hello

please install AIDA64, and find the memory stick details from there and post them here.

This issue can be caused by memory mismatch. I got the same thing in my system since i have different sticks with different timings.
If this is the issue, the way to solve it is quite advanced and requires setting the mem timings in BIOS to the higher values out of all the memory sticks you have.
Click to expand...
1640171073622.png

shared system memory? also wheres the ram category cant find it
 
so how did you solve your problem?
 
I'm glad your problem is solved. :)

Just for future reference if anyone with the same issue finds this topic:

RAM mismatch can also be caused by mismatched ranks. A CPU's memory controller doesn't only allocate channels, but also ranks.

I've just tried to fix an old laptop with an AMD A4-1250 APU with a single channel memory controller, 2 GB onboard memory and one memory slot. I have a 2 GB and two 4 GB sticks at home. The laptop works with all of them, but Windows/Linux detects 6 GB RAM only with one of the 4 GB sticks. With the other 4 GB and the 2 GB stick, the OS detected only 2 GB RAM even though it was all recognised in the BIOS.

The solution: the 4 GB stick that works has 8 memory chips in single rank operation while the other 4 GB and 2 GB sticks have 16 chips each in dual rank. The processor's memory controller can only map two ranks - one is reserved for the integrated 2 GB and one for the memory slot. So the RAM stick I install has to be single rank for the CPU to map and OS to detect it.
 
1640251855580-png.229899



Your ram doesn't seem to be running at the correct frequency though. Make sure you are running it at its maximun of 1600mhz. Maybe thats why its been fixed?

(but before that make sure your laptop supports that)
 
like i said it had nothing to do with the hardware itself. Glad it's fixed. Weird issue you got mate.
 
tussinman said:
Well this sure aged well. He was actually directing you in the right direction and you ended up just laughing at him.......


Yeah I noticed that, you directed him in the right direction and he basically laughed at you
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yes but i also replaced rams again after that or it wouldnt work

de.das.dude said:
1640251855580-png.229899



Your ram doesn't seem to be running at the correct frequency though. Make sure you are running it at its maximun of 1600mhz. Maybe thats why its been fixed?

(but before that make sure your laptop supports that)
Click to expand...
and i dont get that 333 mhz too cpu z always showed my voltage everything different when i change it in bios it always shows same
 
Lol, wtf is going on here...?

Just do a memtest86. At least it can rule out OS and/or software problem. You don't even need to do the complete test.
 
ArdWar said:
Lol, wtf is going on here...?

Just do a memtest86. At least it can rule out OS and/or software problem. You don't even need to do the complete test.
Click to expand...
1641639771215.png

this can't be right
 
it is right
 
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