OCZ PC4200 EL DDR (DDR533) is available in 256MB and 512MB modules, or in 512MB and 1GB Dual Channel kits. They run at CL 2.5-4-4-7 at 2.8V and they have a copper heatspreader. Each module is hand tested on an Asus P4C800 motherboard.
More information can be found on the product page