Windows 7: system wont boot with 8GB ram

hi all!
I'm trying to upgrade my Ram and have run into a brick wall! currently i have 2x 2GB Hynix strontium installed, I try and install the other 2x 2GB sticks in and system dead!
powers up, no POST or beep codes and monitor doesn't even bother powering up!



as far as i know i have the latest bios from gigabyte.
all DDR2 6400, all same brand sticks.. Gigabyte EP41-ud3l bios F4
so any ideas?

Thanks in advance!
*UPDATE*
updated to F6 bios from Gbyte, system powers up, DOES NOT recognise extra 4GB tho..

the issue you got when you put down or upgrade your memory stick.. how is you use just 4GB,,that's the issue come?

issue arose when tried to upgrade from 4GB to 8GB Ram

check your BIOS, that's detect 8GB when you added 4GB more.

checked bios still only 4GB :/

u run at 64bit right?? because if you run on 32bit is just can read only 4GB

yes im running a 64bit system, problem occurs at power on, bios detects only 4GB ram, then randomly reboots in BIOS or when Windows 7 is booting.. starting to think Mobo is farked

let me check your mobo support 8GB or not. later i will post

manual states 8GB max, im thinking its rubbish RAM or dodgy Mobo.. :/

http://www.pbtech.co.nz/index.php?item=MEMHYN22024 memory

http://www.gigabyte.com.tw/Products/...e=GA-EP41-UD3L
mobo ^^

be patient we still don't know what is cause.