NOT A THING!!! - Maybe it's not Cheap, But then Maybe you really do get what you pay for. You do get your moneys worth with this Ram.
I'm running an overclocked XP2400+ with dual 512's of this OCZ ram (PC-2700 Rev. 3.2 COPPER) in an ASUS A7N8X Deluxe Motherboard. My Video Card is an Overclocked ATI Radeon 9600 Pro and my system works just GREAT (I'm A GAMER).
I'll get a NEW 64 Bit Motherboard and CPU in about 1 1/2 yrs or so, when they get cheaper!.
**P.S. I use 333 Ram because it runs Great on my motherboard and I'm going to get an AMD XP3000+ that runs at 333 MHz - AND I MAYBE WRONG, but I like to run my CPU and Ram at the SAME SPEED.