I'm looking to purchase some CAS3 PC133 SDRAM from some local stores. Some of them carry Infineon while others have Micron. I'm wondering which one would be better for overclocking? I'd be interested in running the memory up to 143MHz CAS2. Which of the brands would be able to run at that speed? Is pretty much a guarantee that each brand would be able to run at 133MHz CAS2 from their rated CAS3 specs?