Mimatched RAM

Hello everybody,
I've bought a GEIL dual channel 1066 (2x2GB) 6-6-6-18 (2.0 v) and I want to match it with OCZ dual channel 1066 (2x1GB) 5-5-5-15 (2.1 v). Which Memory Timing and Multiplier should I choose to match them?
you know, my system restarts when I use them together!

Also, My system recognize the GEIL as a 800 Mhz 5-5-5-15! What should I do?

Try first 800Mhz CL5,5,5,15 @2.0V
If it works, you can try 1066Mhz CL6,6,6,18 @2.0V

Anyway, you can use the "cpu-z" which says you the default timings for each speed (533,667,800,1066) and for each module.

Dear All,
M.B : GA EP45-UD3R
FSB : 333

Ok, your mobo support 1066, so, you need set all the specifications manually in the BIOS. configure the RAM at 2.0V and the timings at the low CL.

Yes, you have set them @2.0v (although sometimes a bit lower voltage is enough, but 1.8v is too low)

Thanks Henry, But didn't work!
Maybe there is a problem in GEIL module (GX24GB8500C6UDC) because it is automatically recognized as PC2 6400 (CL 5-5-5-15) in cpuz and Timing Table doesn't have 6-6-6-18 @ 533 Mhz!

Thanks saint19,

OCZ: [url=http://www.ocztechnology.com/products/memory/ocz_ddr2_pc2_8500_sli_ready_edition_dual_channel][/url]

GEIL: [url=http://www.geil.com.tw/products/showSpec/id/214][/url]

Thanks saint19,
But didn't work!

Yes, the GEIL m. are in the 1&3 (red/orange) rows.