Guru3D tests the Sapphire Radeon HD 4890 Toxic Vapor-X edition graphics card.

Armed with a nice vapor chamber heatpipe based cooler and with it's clock frequency locked at a steady 960 MHz, this little beast is ready for some serious gaming action. And it doesn't stop there though, even the nice phat 1 GB graphics memory is clocked higher at 4200 MHz.

This is seriously one of the best Radeon HD 4890 cards we ever tested.