As above I don't think the samsung memory has XMP profiles.
And yes my system has been freezing. I experimented with memory settings and CPU slight overclock but after having a few random freezes I've returned it complete to standard to see how it goes. Mine has been freezing when moving the mouse (or at least that's when I notice it has frozen)- system just completely freezes with mouse pointer not visible anywhere. Hasn't happened often. I'm awayfrom home again now so hopefully by the time I return bios/drivers will have sorted that issue and if the system stays stable for a few days will try optimising it again. I've run a few benchmarks and Prime 95 with memory and CPU increased and all seemed fine but still had the randon freezes only when using the Win 7 desktop (ie, moving mouse)
One question for you guys. When changing memory timings do you have to chang settings for channel A and B, or if you just change Channel A, does the system automatically apply the settings to channel B? Reason I ask is because channel A you can set to Quick (three options are Auto, Quick, Expert). Channel B only has two options - Quick and Expert. It's leading me to think that if you change memory settings for Channel A, they will be replicated automatically to channel B if all Channel B settings are left at Auto? I've not been able to find any software that reports in windows the memory settings for both channels. CPUID I notice shows the settings I use for Channel A hence another reason I'm wondering if the system automatically adjusts the settings for Channel B. If it's not the case it seems a bit rubbish to only report the settings for Channel A in CPU ID when the other channel could be complete different.