Bit-Tech published a review of Pre-Overclocked Nvidia GeForce GTX 280 and 260

Claiming performance increases of up to 12 percent, we decided to put these warranty covered overclocks to the test, and see just how much extra performance you get by paying extra for that bit more juice.

Today we'll be looking at a three cards; from BFG its /GeForce GTX 280 *OCX*/, from Asus its /GeForce GTX 280 *Top*/ and from Zotac its /GeForce GTX 260 *Amp!*/. All the cards involved utilise reference Nvidia reference coolers, but come with their core, shader, and memory clock speeds significantly increased over and above the reference versions. We'll be running them through the same field of real world gameplay tests, and trying to ascertain if paying for a pre-overclocked card is really worth the extra cash involved.

Pre-OC Nvidia GeForce GTX 280 and 260 Review