So far very pleased with these sticks. Due to no AGP/PCI lock on my Abit KV8 I cannot test how far they can be overclocked, but was able to tighten the timings.
On stock voltage got this ram running 2.5-3-3-6 @ 200fsb (ddr400) and 1T CMD, tested stable with no errors on memtest86+ and prime95. Bandwith increased to very near my Corsair TwinX pc3200LL which runs 2-2-2-6 at 1T CMD. OCZ sandra results = 3033/3031, Corsair = 3096/3090. Not bad at all. Any attempt at cas 2.0 resulted in constant reboots.