"The Zotac Nitro arrived Technic3D. The Nitro is based on a VFD display and is connected to the computer via a USB port. The actual benefit of this device however is the fact, that users can change the shader and memory clock of their (Zotac) graphics card by simply pressing some buttons - even while playing a game or using any other application causing a need to the performance of the graphics card increase (or decrease it again later on). Once you reached settings out of the card's limits you can reset it to its defaults with another button. We have check this with a Presample from the Nitro and a Zotac 9800GTX in the Preview." Full Review -Technic3d