Dumo, can you give the batch # of all your 2600K CPUS? Do you have L040B305 and L042B208? I just wonder how far you are able to OC them. I guess the M4E is just that much better in OC these CPUs. I was ready to buy it but they took it off the list while I was at work. I hope when the good chipset version comes out, it will be even better then I will be really happy.