Ati Radeon Hd 4770 Driver
The £200-£250 price range for graphics cards has been really exciting as of late with both the and the providing oodles of performance for a great price. However, there’s no denying it, £200+ is still a huge amount to spend on a graphics card – especially when you can get an entire games console for that sort of money. So, if you only occasionally use your PC for gaming, have a small monitor, or just generally are a bit strapped for cash, the price ceiling is more like £100. In which case a prime candidate for your money should be this new card from ATI.
The HD4770 is built around the RV740 GPU, which is the world’s first graphics chip to be built on a 40nm process, whereas most other cards from both ATI and nVidia currently use a 55nm process. This smaller manufacturing process makes for smaller transistors, meaning more can be fit into the same size piece of silicon. In the case of the RV740 it has 826million in a piece of silicon only 143mm^2. In contrast, the RV770 (as used by the HD4870 and HD 4850) uses the 55nm process and contains 965million transistors. The resultant slab of silicon is 267mm^2 – quite some difference, I’m sure you’d agree. In terms of features, the HD4770 is based on the same architecture as the series, but with tweaks here and there to the amount it has of each constituent part. Namely, there are 128 five-way superscalar shader units that make for a total of 640 stream processors (twice that of the HD46x0 series and somewhat less than the 800 of the HD48x00 series) and 32 texture units.
AMD CrossFireX™ technology requires an AMD CrossFireX™ Ready motherboard, an AMD CrossFireX™ Bridge Interconnect and may require a specialized power supply. AMD PowerPlay™, ATI Avivo™ and ATI Stream are technology platforms that include a broad set of capabilities offered by certain ATI Radeon™ HD GPUs.
Accompanying these are 8 ROPs that use a 128-bit interface to talk to 512MB super fast GDDR5 memory. So, essentially, the HD4770, has nabbed a little bit from both the HD48x0 series and HD46x0 series and ATI has both priced and named the part accordingly – an observation that sounds obvious but, in the world of computer-part naming conventions, is something of a rarity. Considering the basic architecture of the HD4770 is stuff we’ve covered before, we’ll keep our discussion of the technicalities to a minimum (check out our in-depth study of the if you’d like to learn more) and actually let our test results do the talking with regards performance.
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