Hexus.net reviews a stick of 256MB TwinMOS PC3200 RAM.

The TwinMOS PC3200 256MB DDR Memory Module exceeded its specification and achieved a maximum bus speed of 207 Mhz at its rated timings, and still managed to do 212Mhz at more relaxed timings. The Corsair XMS3200 outperformed it by a noticeable margin, but to be fair, the Corsair RAM is considerably more expensive and is rated for better memory timings. The TwinMOS PC3200 performed very well in the tests, even at its default timings. It's a pity it couldn't manage 200 Mhz bus full timings like the Corsair XMS3200, but still it's leaps and bounds over what you would be able to push the bus to with PC2100 or even high quality PC2700, and to be fair it is a lot cheaper.