New Build Error "1d"

[sogg]

hello
I have just finshed setting up my new pc.
When i first powerered up the system, it booted and brought up the error "cmos Checksum error defults loaded" so i went into the bios set eveything up, rebooted... same thing came up again. so once again i went into the bios and put in the settings. next bootup is dead, the lcd shows error 1d. Not sure what this means and what i should do
Any help greatly appriciated.

System specs are
Q6600
XFX 680i mobo
4GB OCZ PC2-6400 1GBX2 SLI READY EPP 4-4-4 1T (OCZ2N800SR2GK)
36GB Raptor
750GB WD HDD
XFX 8800GTX
2x DVDRW drives
Coolermaster 850watt PSU

Thanks alot

[Scott]

Try 1 stick of RAM at a time, sounds like a bad stick.

[xfxsupport]

If that does now work the let us know.

[werty316]

I consulted the manual and it looks like a memory conflict; try what Scott suggested and try one stick install at one time in each memory.

[sogg]

Thanks for the input guys
I removed all the sticks and it booted with only one. i tried putting in the rest one by one but kept giving me error 1d. So i booted with 1 went into the bios and disabled SLI ready memory.. Then it would boot with all 4gb. But now that i am trying to install vista i get BSOD saying IRQ not less or Equal.. or something like that. i know this generally means bad ram. but i have ran memtest for some time and it hasnt given me a error. Any ideas?

[Scott]

Go into the BIOS and up the memory voltage to 2.1Volts. By default it sits around 1.8Volts and the RAM does not have enough Voltage to run stable.

I have 4 1GB stick of the Corsair 6400 in mine running at 2.1Volts just fine.

[xfxsupport]

Good catch Scott.