Would help if you post the beep code. They're all listed in the manual, page 8.

Did you try clearing BIOS after installing the new RAM?

I do not know what the "R" was in your memory specifications, 10600R.

Dell validated 2GB sticks =
DDR3-1333 PC3-10600 667MHz, 166Mhz memory clock

8XHDX 1333,128X64,1RX8
1N7HK 1333,128X64,1RX8
PT4JW 1333,128X64,1RX8
CV122 1333,128X64,1RX8
H92NK 1333,128X64,1RX8
P223C 1333,128X64,1RX8
G8NT0 1333,128X64,1RX8
2CK3D 1333,128X64,1RX8
P884D 1333,256X72
J160C 1333,2RX8X72

Dear Chris,

R, means REGISTERED.

Maybe this is the problem.

Anyway, memory works in the GIGABYTE board. Strange!

That board was made for i7's! Not even zeon's. It works with registered memory and a Dell workstation doesn't?

Strange. Tomorrow I will try the X5650 in T3500 with the registered memory.  

Nikos

Dear Ron,

Soon, i will check the error code and post back.

I have also cleaned the CMOS. No juice...

Nikos

The error code is 1-3-2. Means "1st 64 K RAM test in progress or failure".

Also, the led "1" lights up. Means "No memory modules detected"

Nikos

Registered Ram is Buffered and therefore does not work.

There are 2 kinds of ECC registered buffered and NON Registered Non Buffered.

24 GIGS Tri channel Ram is the max for the T3500 aka 6 X 4 gig module.