Zotac GeForce GT 640 Zone Edition 2GB
Zotac provided their Zone Edition of the GeForce GT 640. This GT 640 is a pretty new card from Nvidia and is based on the GK107 chip, a smaller and less powerful version of the GK104 from Nvidia's high-end graphics cards. The GK107 has 384 shader units (compared to the 1536 in the GK104), a 128-bit memory bus (instead of 256-bit) and typically gets slower DDR3 memory instead of the more expensive GDDR5.
The GPU runs at 902 MHz (slightly higher than Nvidia’s standard speed) and it has 2 GB of memory clocked at 891 MHz. It's the only card with 2 GB of RAM, the others have 1 GB. Connectors include two DVI ports (one dual-link) and mini-HDMI. There is no DisplayPort.
The GT 640 can't keep up with the Radeon HD 7750 in terms of performance. With 9484 3DMark Vantage points and 2407 3DMark11 points the card can handle basic 3D games on low resolution, but nothing too demanding. The passive cooler takes up two slots and has three heatpipes. After two runs of Metro 2033 the drivers measured 68 degrees, but we didn't measure more than 58 degrees at the back of the card. It's slightly warmer than the AMD cards, but still far within safety margins.
Like the performance, the average price of £76 is lower than that of the Radeon HD 7750s.