Legit Reviews posted a review on the Zotac GeForce GT 640 Zone Edition Video Card

We usually look at mainstream and high-end graphics cards, but the Zotac GeForce GT 640 Zone Edition managed to catch our attention since it is passively cooled. The idea of having a silent video card without any active cooling fans is a big deal for the HTPC crowd and those users want silence. The Zotac GeForce GT 640 Zone Edition video card was announced in July 2012, but has yet to make it to the retail market for some reason. We held this review on purpose as there is no sense in reviewing a video card that you can not buy. Zotac informed us that the card is now shipping and should become available to purchase online in the next week or two. So, we figured that now is the perfect time to take a look at this zero noise graphics card!

The Zotac GeForce GT 640 Zone Edition uses the NVIDIA GK107 'Kepler' 28nm GPU that has 384 CUDA cores (shader units) and 16 ROPs. This card is clocked at 902MHz and does not feature a boost mode. When it comes to memory you'll find that this card has 2048 MB (2GB) of DDR3 memory that runs on a 128-bit memory bus. Most mainstream and high-end cards today use GDDR5 memory, but DDR3 memory is less expensive to use. The 2GB of DDR3 memory runs at 891MHz on this particular card.

  Zotac GeForce GT 640 Zone Edition Video Card Review