Source: Custom PC Magazine,16th July 2008 by Ben Hardwidge
How much video memory do you really need?
Here’s a card that will be of little use to those with a 32-bit operating system, unless you have an irrational fear of system memory. PowerColor has just announced the first mainstream 2GB graphics card; the PCS HD4850 2GB.
Why would you need so much video RAM? In proper Pidgin English, PowerColor claims that the ‘more the memory buffer, the more the data graphics can be saved - thus eliminating the need to access system memory and providing faster graphical performance.’ The company also claims that the extra memory will help out with ‘real time processing of large textures,’ as well as allowing anti-aliasing to be used at higher resolutions.
The card also features a 665MHz core, offering a 40MHz boost over the standard 625MHz clock. Meanwhile, PowerColor claims that the 2GB of memory will offer a bandwidth of 57.6GB/sec through a 256-bit bus, suggesting that the GDDR3 memory is clocked at 900MHz (1.8GHz effective), rather than the 1GHz (2GHz effective) memory clock on standard Radeon HD 4850 cards.
PowerColor is also planning 512MB and 1GB versions of the PCS HD4850 card, and all the cards will come with PowerColor’s PCS heatsink, which we first saw on the HD 3850 Xtreme PCS 512MB GDDR3.
