BSOD after building in new Ram

Hello there
I buuilt in new Ram a week ago , and hadnt had problems so far. Today
my pc randomly starts crashing, and bluescreen gives me a memory_managemnt error , so i guessed on the new Ram
Here are my specs
CPU : Intel Core 2 Extreme QX9650
Mainboard : EVGA nForce 780i SLI
Memory: 8GB DDR2 - 4 times 2 GB OCZP10662G
Graphics : 2 times Nvidia GForce 8800 GTX with SlI
OS : Windows 7 64 Bit

I dont know what causes the error and i dont know how to fix it... tried to set the timings to 6-6-6-18 but didnt help , i didnt touch the voltage tough , its set at 1.85 at bios

here is my crashdump

*******************************************************************************
* *
* Bugcheck Analysis *
* *
*******************************************************************************

MEMORY_MANAGEMENT (1a)
# Any other values for parameter 1 must be individually examined.
Arguments:
Arg1: 0000000000041790, A page table page has been corrupted. On a 64 bit OS, parameter 2
contains the address of the PFN for the corrupted page table page.
On a 32 bit OS, parameter 2 contains a pointer to the number of used
PTEs, and parameter 3 contains the number of used PTEs.
Arg2: fffffa8000ee0bc0
Arg3: 000000000000ffff
Arg4: 0000000000000000

Debugging Details:
------------------


BUGCHECK_STR: 0x1a_41790

CUSTOMER_CRASH_COUNT: 1

DEFAULT_BUCKET_ID: WIN7_DRIVER_FAULT

PROCESS_NAME: WerFault.exe

CURRENT_IRQL: 0

LAST_CONTROL_TRANSFER: from fffff80002d4bd40 to fffff80002cdac00

STACK_TEXT:
fffff880`0a51a958 fffff800`02d4bd40 : 00000000`0000001a 00000000`00041790 fffffa80`00ee0bc0 00000000`0000ffff : nt!KeBugCheckEx
fffff880`0a51a960 fffff800`02cc73ff : fffffa80`00000000 00000000`005effff 00000000`00000000 fffff800`02fd32d4 : nt! ?? ::FNODOBFM::`string'+0x35084
fffff880`0a51ab20 fffff800`02cd9e93 : ffffffff`ffffffff 00000000`000adbe0 00000000`000adbd8 00000000`00008000 : nt!NtFreeVirtualMemory+0x61f
fffff880`0a51ac20 00000000`773614fa : 00000000`00000000 00000000`00000000 00000000`00000000 00000000`00000000 : nt!KiSystemServiceCopyEnd+0x13
00000000`000adba8 00000000`00000000 : 00000000`00000000 00000000`00000000 00000000`00000000 00000000`00000000 : 0x773614fa


STACK_COMMAND: kb

FOLLOWUP_IP:
nt! ?? ::FNODOBFM::`string'+35084
fffff800`02d4bd40 cc int 3

SYMBOL_STACK_INDEX: 1

SYMBOL_NAME: nt! ?? ::FNODOBFM::`string'+35084

FOLLOWUP_NAME: MachineOwner

MODULE_NAME: nt

IMAGE_NAME: ntkrnlmp.exe

DEBUG_FLR_IMAGE_TIMESTAMP: 5147d9c6

FAILURE_BUCKET_ID: X64_0x1a_41790_nt!_??_::FNODOBFM::_string_+35084

BUCKET_ID: X64_0x1a_41790_nt!_??_::FNODOBFM::_string_+35084

Followup: MachineOwner
---------

Try using only 2 modules of ram and see what happens.

Also, what power supply you have?

ok ill do that later, but why does this occur now ? from one day to the other ?
uhh , dont know , where do i find that ?

Depending on the case the power supply is in the back, at the top/bottom of the case.

Judging by your sli video cards you should have something above 450-500 W.

You can try to test your memory with memtest86 too.

ok wait i check , btw , what should be the right volatge for the ram ? i read somewhere that it should be 2.1 but on other places tey say 1.8 etc...

thats mine here

It's ok. Pretty good power supply.

You tried to OC the memory? Can you post a screen for the memory in cpu-z? At 800 Mhz they should run ok but at 1066 sometimes they have problems.

no , i run it at 800 MHz , its just the voltage that i am not sure about which to take , in Cpu-z , what does the case in the bottomr ight corner mean ? wait ill highlight it

p.s. have you taken a look at the minidump ? what confuses me are those 3 passages :

MEMORY_MANAGEMENT (1a)
# Any other values for parameter 1 must be individually examined.
Arguments:
Arg1: 0000000000041790, A page table page has been corrupted. On a 64 bit OS, parameter 2
contains the address of the PFN for the corrupted page table page.
On a 32 bit OS, parameter 2 contains a pointer to the number of used
PTEs, and parameter 3 contains the number of used PTEs.

and

DEFAULT_BUCKET_ID: WIN7_DRIVER_FAULT

and this one

IMAGE_NAME: ntkrnlmp.exe

i cant find a realation bewteen them

Well, if you only changed your ram and you have problems then you should test them.

Run Memtest86+ for at least 8-10 passes. It may take up to 20 passes to find problems. Make sure to run it once after the system has been on for a few hours and is warm, and then also run it again when the system has been off for a few hours and is cold. How to Test and Diagnose RAM Issues with Memtest86+

I had few years ago 2 modules of faulty ram and I had errors and bsods out of nowhere. Tested them with memtest and red sectors everywhere :)