gaming pc

Friday, December 4, 2009

ATI (well, AMD) steps up!

New video cards aren't always something to get excited about (remember the 9800 GTX+?) but ATI's 5000 series is looking very, very interesting.

The company needed some wins, having lived in Intel's CPU shadow for so long. ATI's 5000 series brings DirectX 11 to the table - something that nVidia has yet to do. As with the move to DX10, it's anybody's guess as to when, or even if, there will be real-world benefits to DX11 capability. DX10 took a long time to be adopted by the game developers, and when it did, the extra eye candy made a lot of PCs run more slowly. Still, DX11 has a lot more potential to speed things up instead of slowing them down, and our advice is to go with ATI for now, at least until nVidia catches up.

The 5000 series also offers Eyefinity - the ability for one card to drive three monitors at the same time. There is even emerging support for Eyefinity in Crossfire mode (currently only in the 5970). It's not something most of our customers are clamoring for, but it's another ATI first, and adds to the value of the 5000 line. Weigh that against nVidia's PhysX if you're looking for brand-specific options.

There are five ATI cards in our lineup now. The first two are recommended for gaming at 1680x1050 or lower resolution (typically that means 22" monitors or smaller):

"Juniper" architecture
HD 5750 - 700MHz, 1GB of VRAM
HD 5770 - 850MHz, 1GB of VRAM

Both cards offer good performance. The 5770 offers about 15% more performance for about 15% more money, so choosing between them is really more about your own personality than anything concrete.

The remaining three cards are based on ATI's "Cypress" architecture (Juniper's big brother). Our minimum recommended card for gaming at 1920x1200 (usually 24" monitors) is the 5850:

HD 5850 - 725MHz, 1GB of VRAM

That leaves two super-expensive cards at the top. The 5870 and 5970 feature the same type of GPU, but the 5970 has two of them, essentially offering a Crossfire setup on a single circuit board (we were expecting it to be named the 5870x2, to keep up previous naming convention.) The 5870 is probably overkill in most 1920x1200 situations (the 5970 definitely is) but you'll want at least one of these if you're gaming at 2560x1600 (usually a 30" monitor).

HD 5870 - 875MHz (overclocked from 850MHz), 1GB of VRAM
HD 5970 - 725MHz (to reduce heat from the 2 GPUs) , 2GB of VRAM

As always, we like to point out that the industry likes to bill dual-GPU cards as having twice as much VRAM as they effectively have access to. Yes the 5970 has 2GB of VRAM, but as it is split evenly between two GPUs in Crossfire mode, you're actually working with 1BG of effective space, just like the 5870. This means that when playing games that perform poorly under Crossfire (and thankfully such situations are becoming more rare) the 5870 will outperform the 5970. If you're planning to play many different games in the future, the 5970 would give you a bigger overall benefit, but if you're buying a PC with one or two particular titles in mind, check out those interwebs to make sure Crossfire works well with them.

1 Comments:

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