Vista won't boot after adding ram

[koolaid-dude]

So Im running the following
Vista Ultimate x64
Gigabyte GA-P35-DS3L
Intel Pentium Dual Core E2160 OC @ 3.00 GHz
XFX Nvidia GeForce 8400 GS
2x Samsung DDR2 Samsung 1GB 667 MHz - original install
2x OCZ PC2 6400 1GB Gold Edition 800 MHz - just upgraded

My problem is that upon booting with all 4GB in, Vista gets to the login screen, I enter my pass, and then I get BSOD.

I can boot perfectly fine with either 1 of ea. type of ram, both of the samsung, or with both samsung and 1 OCZ in, it only crashes to BSOD upon adding all 4 sticks.

Update - here is the details vista gives me after i try to boot with all 4 sticks then remove one.
Problem signature:
Problem Event Name: BlueScreen
OS Version: 6.0.6000.2.0.0.256.1
Locale ID: 1033

Additional information about the problem:
BCCode: 3b
BCP1: 00000000C0000005
BCP2: FFFFF9600008CBE2
BCP3: FFFFF9800E4E7030
BCP4: 0000000000000000
OS Version: 6_0_6000
Service Pack: 0_0
Product: 256_1

[Dwarf]

This problem can be caused by incompatible memory. Mixing memory brands and speeds in a PC is asking for trouble. In addition, some motherboards have problems when all memory slots are occupied. What happens when you try the other RAM combinations, i.e. both OCZs or both OCZs with a stick of the Samsung?
Dwarf