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Discussion Starter #1
I got hold of 2 sticks of matched Corsair 512 Meg PC3200 memory. You can see it in DIMM2 and DIMM4 below. I am nor over clocking the machine and it appears to be working fine at 3 Gig with an 800 M FSB. At this spead will mixing PC3200 and PC3700 have any performance problems like not running at 200 Megs or only in single channel mode.

Thanks in advance
Peter

SPD Memory Modules
DIMM1: Corsair CMX512-4000 512 MB PC3700 DDR SDRAM (3.0-5-5-8 @ 232 MHz)
DIMM2: Corsair CMX512-3200C2 512 MB PC3200 DDR SDRAM (3.0-3-3-8 @ 200 MHz) (2.5-3-3-7 @ 166 MHz) (2.0-2-2-6 @ 133 MHz)
DIMM3: Corsair CMX512-4000 512 MB PC3700 DDR SDRAM (3.0-5-5-8 @ 232 MHz)
DIMM4: Corsair CMX512-3200C2 512 MB PC3200 DDR SDRAM (3.0-3-3-8 @ 200 MHz) (2.5-3-3-7 @ 166 MHz) (2.0-2-2-6 @ 133 MHz)
 

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Thanks for the info. I got the extra memory so I could run BF 2 at higher video resolution. At medium settings with a resoltion of 1280 x 1024 it was using nearly 800 megs of memory and I have got the AGP aperture set to 256 Megs so I thought an extra gig of memory was called for :grin:

EDIT btw it is an ASUS P4C800-E Delux mobo so I posted in here.
 

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@ Peter_UK
Your PC3700 RAM will just lower down to the PC3200 speed, if you have your FSB at 800MHz and your DRAM clock set at 200MHz in BIOS, which are standard default settings for your RAM with a 800FSB. I see you posted the SPD timings of your memory, but what timings are they running at now? If you just let them run at default/SPD, they may be at 3-3-3-8. You may be able to tighten those up(2-3-3-6?) and see some good performance gains without overclocking. You can check in the free Everest Home edition memory benchmarking('Benchmarks') utility. What are the three scores generated in Everest? Your timings will also be listed in the 'Latency' benchmark, as well as under the 'Computer>Overclock' heading, look under 'chipset properties' at 'memory timings'. Your timings are also listed under 'motherboard>chipset>memory timings. The SerialPresenceDetect timings are just what the memory tells the computer to set the generic timings at, to be safe on any system. You may be able to do much better with your system.

You might want to check out the official Corsair support forum and this thread
 
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