Memory not being recognized

[giglio67]

Mother board is a ASUS P5QL Pro,
Installed on it is 1 Intel Core 2 Quad 2.6ghz

2 2 gig OCZ2G8004GK 4 gig total
2 2 gig G-Skill 4 gig total

It runs fine with the first 4 gig of memory G-Skill
However when I installed the second set of memory OCZ it will not recognize it

ASUS is telling me the board is fine
I have windows 7 enterprise version running

Any Ideas would be helpfull

 

[Sahakiel]

64-bit Windows installation?

 

[giglio67]

Yes 64 bit install
It was installed with the original 4 gig s

 

[Sahakiel]

Usual laundry list:
check seating
check timing
check power
check individually
etc.

 

[giglio67]

Did all of this already
check seating
check timing
check power
check individually

Still Windows os does not recognize it , Funny bios does

 

[Blain]

Do both kits have the same voltage ratings... same timings?

 

[giglio67]

I tried all 8GB as F2-6400CL5D-4GBPQ
then tried mixing and matching 4GB OCZ2G8004GK

 

[Nothinman]

Does the "it" that doesn't recognize the memory referring to Windows or the BIOS?

 

[giglio67]

Sorry Windows 7 64 bit install doe snot recognize anything past 4 gigs.
I Installed it with 4 gig and have now attempted to add an additional 4 gigs
It boots but hangs on the windows logo when i put the additional 4 gigs in

 

[Nothinman]

But does the BIOS show 8G total after installing it?

 

[giglio67]

YES Bios shows it

 

[Syran]

I tried all 8GB as F2-6400CL5D-4GBPQ
then tried mixing and matching 4GB OCZ2G8004GK

Did you have any problems with Windows when you JUST use the OCZ memory, without the original gskill?

 

[giglio67]

no problems with either memory

 

[Nothinman]

Have you run memtest for a few hours with both installed?