4x2GB ram installed, BIOS and Windows only see 4GB

[NecroFlex]

So i just got an Asus P5E WS PRO, can be used as a workstation mobo (supports ECC),  But here's the issue, specs say it supports up to 8GB of ram, i have 4 sticks of 2GB modules which i know work, BIOS is updated and stuff. It basically only sees 4 out of the 8GB installed, i saw that it won't boot when there's a single stick in the first or second slot, but the 2 sticks that it sees are still in dual channel.

So are the slots dead or is there another issue, maybe cause it supports ECC it has 2 for normal and 2 for ECC?

[Justin_]

What version of Windows are you using? 32 or 64 bit,and Pro, Home, or Home premium?

[NecroFlex]

Windows 7 ultimate 64bit, forgot to add it in the OP, sorry

 

EDIT: CPU is a C2D E8600

[Justin_]

hummm. What is your motherboard?

[Nowak]

Try running Memtest86? See if any modules are bad.

[Justin_]

woops you told alredy

[don_svetlio]

Does the CPU/Board support more than 4GB? My friend has 3.5GB installed with a Athlon 64 X2 CPU but the system only sees 3GB since the board doesn't support more than that

[NecroFlex]

like i said before, the ASUS page says it supports 8GB, both ECC and non-.ECC.

Already ran memtest on another machine, all sticks work

[DXMember]

like i said before, the ASUS page says it supports 8GB, both ECC and non-.ECC.

Already ran memtest on another machine, all sticks work

could you try switching the stick around in the motherboard slots to make sure all the mobo slots work?

[airdeano]

if the BIOS only sees 2x modules, you have either bent pins in the CPU socket,

one/more traces are damaged (incomplete circuit), damaged DIMM slot(s) or

defective RAM modules.

[Master Disaster]

like i said before, the ASUS page says it supports 8GB, both ECC and non-.ECC.

Already ran memtest on another machine, all sticks work

Grab AIDA64 or Speccy and run it. Go to the memory page and check which sticks are being detected and which are not.

Swap them over and check again.

From there it's easy to work out if it's the sticks or slots that are bad.

[DXMember]

Grab AIDA64 or Speccy and run it. Go to the memory page and check which sticks are being detected and which are not.

Swap them over and check again.

From there it's easy to work out if it's the sticks or slots that are bad.

the sticks have been already tested in another system

[NecroFlex]

from what i see, the first 2 slots don't work, the second 2 do and somehow work in dual channel even tho they aren't the same color

[NecroFlex]

Ok so the 2x4GB sticks work in the 3rd and 4th slot, it shows 8GB, yet it shows 667MHz instad of 800MHz as the sticks are 800MHz

[NecroFlex]

the pins aren't bent, tried another CPU, still nothing, flashed BIOS and nothing, so the slots are probably dead

[NecroFlex]

if the BIOS only sees 2x modules, you have either bent pins in the CPU socket,

one/more traces are damaged (incomplete circuit), damaged DIMM slot(s) or

defective RAM modules.

I can feel the southbridge overheating (it's hot to the point it hurts), can this be the cause?

[kameshss]

I can feel the southbridge overheating (it's hot to the point it hurts), can this be the cause?

Try with one or two sticks and check the heat 

[NecroFlex]

Try with one or two sticks and check the heat 

it's overheating with 2 sticks already, the first 2 slots don't even work. If i put only a stick in the first or second slot all the fans spin, the HDD sounds like it's booting up but there's a black screen.

[kameshss]

it's overheating with 2 sticks already, the first 2 slots don't even work. If i put only a stick in the first or second slot all the fans spin, the HDD sounds like it's booting up but there's a black screen.

Sounds like motherboard problem.

 

If the sticks are working good in different system, then it's your motherboard.

 

If your motherboard still has warranty, RMA it.

[NecroFlex]

It's a 775 mobo, i got it used from a guy, will contact him about it, thanks for the help

[ShiroArikawa]

Sounds like motherboard problem.

 

If the sticks are working good in different system, then it's your motherboard.

 

If your motherboard still has warranty, RMA it.

you should RMA that GT.