Adding DDR2 with different supported timings

Hi all,

I currently have a Gigabyte GA-P35-S3G motherboard with 2Gb of Corsair DDR2 667 XMS2 installed. Currently running at a 1:1 ratio with an E6750. They are 2 sticks of 1Gb populating the first and third slot in the available memory slots, running in dual channel mode. Checking CPU-Z they are running with timings of 5-5-5-15 although I think I remember they are rated upto 4-4-4-12 and looking at the SPD section of CPU-Z that timing is indeed listed but under the 266 MHz frequency.

Anyhow, I picked up an extra 2Gb (2 x 1Gb) DDR2 800 Corsair XMS2 cheaply from eBay and checking the specs these are rated 5-5-5-18 at 800 Mhz.

I plan to install these in slots 2 and four, in addition to the current 2Gb and to maintain dual channel mode. I don't overclock and understand these would underclock anyway to the slowest stick in the system. So they'd all be running 1:1 at 667 Mhz.

The only thing I'm not so sure about is whether they can run with different timings or whether I need to adjust the timings manually through the BIOS or whether the SPD on the the new memory will adjust accordingly.

Appreciate any feedback.

Cheers.

Thanks for that. Finally got around to installing them and worked out just as you said with CPU-Z reporting all 4 sticks running at 1.8v at 5-5-5-15.