Asus EAHD4870X2 Top graphics card

If you’ve read the review of Nividia’s GeForce GTX 295 card on cnet.com, you might be able to guess our assessment of this overclocked, Asus-packaged version of AMD’s ATI Radeon HD4870X2. Simply, for $550–$50 more than the Nvidia card–the amped up Radeon card gives you less performance and uses more power along the way. The only solace we can offer for AMD is that this card has a minor (borderline irrelevant) software support advantage, and a mildly easier setup process. Whether you value those features or not, the primary reason for purchasing an expensive 3D card is speed. And in the high-end price range, the Radeon EDHD4870X2 comes in second.

The Asus EAHD4870X2 Top card is an overclocked model of AMD’s standard ATI Radeon HD4870X2 design. At its core, the Radeon HD4870X2 features two graphics chips on a single PCI Express graphics card. You can find iterations of this card in stock speeds for $50 less, but, as many graphics card packaging vendors will do, Asus took the Radeon HD4870X2 and tweaked its settings for extra performance. In particular, Asus overclocked the stock clock speed of each Radeon HD4870X2 chip to 790MHz, up from 750MHz.

Asus EAHD4870X2 Top Nvidia GeForce GTX 295
Price $550 $550
Manufacturing process 55nm 55nm
Core clock 790MHz 576MHz
Stream processors 800 (2) 240 (2)
Stream processor clock NA 1.24GHz
Memory 2GB 1792MB
Memory speed 3.66GHz DDR 5 2.0GHz DDR3

As you can see from their specs, the Asus card and the GeForce card are actually quite different. Asus boasts more than three times the total stream processors (the pipelines that perform the various graphics-processing tasks) of the Nvidia card, and its 2GB of DDR 5 video memory has a faster clock speed then the 1.792MB of video RAM on the GTX 295. Each chip is also the product of a 55-nanometer manufacturing process. Even though both ATI and Nvidia use the same process, we suspect this is what gives Nvidia most of its performance and power-efficiency gains compared with its older 65nm GTX 200-series chips. Those older chips were fast, but it’s apparently able to eke out even more performance by going to 55nm.

Source / Complete Review on cnet.com