New RAM PC Wont POST

Bonjour_Rodney · 4 Jun 2011 at 11:18

OK I just upgraded my RAM for my rig below to this new corsair stuff.

Corsair Vengeance 8GB (2x4GB) DDR3 1600Mhz CL9 1.5V Non-ECC Unbuffered.

After installing it the system wont even POST. HELP please? :confused:

My current rig which works fine.

Asus M4A785TD-V EVO 785G Socket AM3 onboard DVI VGA HDMI 8 channel audio ATX Motherboard

AMD Phenom II X4 965 Black Edition 3.4GHz Socket AM3 8MB Cache 125W

OCZ 4GB KIT (2 x 2GB) DDR3 1600Mhz PC3 12800 REAPER SERIES DUAL CHANNEL KIT (7-7-7-24)

Surveyor · 4 Jun 2011 at 11:30

I assume you've removed the OCZ RAM.

Are the memory settings in the BIOS on auto or set to manual?

The new RAM is 9-9-9-24 and the old 7-7-7-24.

The new RAM won't run at the same settings as the old.

Put the old RAM back in and ensure the memory timing is set to auto or manually set it to 9-9-9-24.

Blue160 · 4 Jun 2011 at 11:34

Just looked at the list of approved RAM for that board.

There are no 4GB sticks mentioned, it may not be compatible.

Surveyor · 4 Jun 2011 at 11:40

Blue160 said:
Just looked at the list of approved RAM for that board.

There are no 4GB sticks mentioned, it may not be compatible.

The specification says 4 x DIMM, Max. 16 GB, DDR3 1800(O.C.)*/1600(O.C.)/1333/1066/800 ECC,Non-ECC,Un-buffered Memory.

So 4GB sticks should work.

The approved list is from 2009. I doubt there were many 4GB sticks to test then.

Bonjour_Rodney · 4 Jun 2011 at 11:41

Oh my god, I asked on here if they would be compatible and I got a definite yes.

I'm gonna be so annoyed

Bonjour_Rodney · 4 Jun 2011 at 11:42

yeah I removed THE OCZ stuff

Surveyor · 4 Jun 2011 at 11:44

Bonjour_Rodney said:
yeah I removed THE OCZ stuff

Well put one back in now and set the timings in the BIOS for the new RAM (9-9-9-24, 1.5-1.6V), save the settings, switch off, remove the old RAM and put in the new.

Bonjour_Rodney · 4 Jun 2011 at 11:55

Arghhhh, I aint got a clue which setting to change.

Blue160 · 4 Jun 2011 at 12:01

Have you got the latest BIOS revision?

Bonjour_Rodney · 4 Jun 2011 at 12:01

DRAM Timing Mode
Auto
DCT 0
DCT 1
Both

then

TCL
TRCD
TRP
tRTP
TRAS
TRC
tWR
TRRD
tRWTTO
tWRRD
tRWTTO
tWRRD
tWTR
tWRWR
tRDRD

and more
the list is enormous

Bonjour_Rodney · 4 Jun 2011 at 12:02

i'll flash my BIOS first I think

Surveyor · 4 Jun 2011 at 12:05

Easy option first.

Memory clock mode: Manual.

Memclock value set at 667MHz for now.

DRAM Timing Mode: Auto

Memory OverVoltage: Auto

If that works we can tweak from there. If it doesn't we'll have to change a few more settings.

fleming222 · 4 Jun 2011 at 12:11

Tried each stick individually?
Or in different slots?

Bonjour_Rodney · 4 Jun 2011 at 12:13

ok trying the above now.

Bonjour_Rodney · 4 Jun 2011 at 12:14

yeah, i've tried each stick individually in each slot

Surveyor · 4 Jun 2011 at 12:14

Bonjour_Rodney said:
DRAM Timing Mode
Auto
DCT 0
DCT 1
Both

then

TCL
TRCD
TRP
tRTP
TRAS
TRC
tWR
TRRD
tRWTTO
tWRRD
tRWTTO
tWRRD
tWTR
tWRWR
tRDRD

and more
the list is enormous

You'd only need to set 4 of those.

TCL 9
TRCD 9
TRP 9
TRAS 24

Bonjour_Rodney · 4 Jun 2011 at 12:16

Tried the above Settings, still wont POST

Bonjour_Rodney · 4 Jun 2011 at 12:17

I also cleared CMOS so everything was on Auto and still wont POST

Surveyor · 4 Jun 2011 at 12:22

Bonjour_Rodney said:
I also cleared CMOS so everything was on Auto and still wont POST

OK.

Memory clock mode: Manual.

Memclock value set at 667MHz for now.

DRAM Timing Mode: Manual and these settings:

TCL 9
TRCD 9
TRP 9
TRAS 24

Memory OverVoltage: 1.6V (or +0.1V if that's how it works)

Try a single stick at a time.

Bonjour_Rodney · 4 Jun 2011 at 12:26

DRAM timing mode DCT 0, DCT 1 or Both?