Windows 7 Memory issue

[ddrueding]

See attached image.

This machine has 12GB in it, and it passed memtest86+ overnight at these settings. For some reason, the line reads:

"Installed memory (RAM): 12.0 GB (8.00 GB usable)"

And sure enough, my apps only see 8GB.

After some googling, some people said that doing some re-mapping in the BIOS fixed the issue, but I can't find the settings they used.

Any advice?

 

[MaxBurn]

Odd, I never had any luck with an upgrade after many attempts and after wasting so much time with that decided I didn't want to invest more time in doing a clean setup. Maybe some day.

Does vista see 12gb on that computer?

 

[ddrueding]

XP x64 did, so did Ubuntu 9.04 x64. Windows 7 does see it, just won't give it to me?

 

[Howell]

What does task manager show you? Also is there only one x-bit version of Windows 7?

 

[ddrueding]

Task Manager shows 8GB. This is the only x64 (64-bit) Ultimate version of 7 that I know of.

 

[Howell]

Task Manager shows 8GB. This is the only x64 (64-bit) Ultimate version of 7 that I know of.

The screen shot didn't say 64-bit so I thought it possible to be 32. Did not want to overlook the obvious.

 

[ddrueding]

I do appreciate that. I have done much dumber things in the past.

 

[Mercutio]

Have you dug around in your BIOS for settings related to memory, yet?

 

[ddrueding]

I have. Other than voltage/timing stuff, I can't find anything. There is no setting for "reserve" or "memory mapping" that I can find. The fact that it sees the memory and refuses to use it has me puzzled. memtest86+ sees all the memory as well. So does CPU-Z in Win7.

 

[Mercutio]

Yeah. I just looked on my i7 system and I don't see anything like that either.
I've got Server 2008 on mine but only 6GB RAM, and that's fine.

 

[Fushigi]

Well, I can't really help. I did see 8GB as the limit for the W7 Home Basic, though, and wondered for a moment if MS might have set all versions of the RC to that.

I haven't tried the RC so far myself, but this has prompted me to d/l it to put on a spare machine.

 

[Handruin]

I'm seing similar information that Fushigi mentioned and I also wonder if the RC has some limitation in place.

 

[ddrueding]

Yeah, I'm not running 192GB yet. I wonder if that RAMDisk software I got a while ago will let me use it...

 

[ddrueding]

Following up on this issue, even after I switched back to XP it only showed 8GB of RAM. Removing even one stick (any one stick) brought it down to 4GB.

So I tried upgrading the RAM, and it works fine!

Old memory:
Corsair XMS3 1600MHz 12GB (6x2GB) 9-9-9-24 1.60V ver8.1 HX3X12G1600C9

New memory:
Corsair XMS3 1600MHz 12GB (6x2GB) 9-9-9-24 1.60V ver9.1 HX3X12G1600C9

Putting all the old RAM in another system (running the same motherboard, and same OS image) caused it to work fine as well.

 

[LunarMist]

So only 8GB were used this whole time?

 

[ddrueding]

Yup, just didn't have time to mess with it.