For instance, multi-pass rendering doesn’t handle transparent or translucent surfaces particularly well. Storing intermediate results in a FIFO buffer not only offers the potential for big performance increases over traditional multi-pass techniques, it also sidesteps a number of problems. Mark and Kekoa Proudfoot at Stanford University. Hard to argue with that. Read on as we examine the Pro in detail, exploring the performance and technology behind ATI’s latest and greatest.

Uploader: Maushakar
Date Added: 14 February 2007
File Size: 44.37 Mb
Operating Systems: Windows NT/2000/XP/2003/2003/7/8/10 MacOS 10/X
Downloads: 64917
Price: Free* [*Free Regsitration Required]

The genesis of the F-buffer idea was a paper by William R.

ATI Radeon Pro (MB, AGP) Overview – CNET

Hard to argue with that. Mark raden Proudfoot suggested the F-buffer as a means of storing intermediate results of rendering passes without writing each pixel to the frame buffer and taking another trip through the graphics pipeline. With lro shading languages, developers need not think much about the hardware’s per-pass limitations. NVIDIA’s GeForce FX Ultra may have captured at least part of the technology and performance titles for itself, but the cards are so rare, we haven’t even been able to secure one for review.

Voldenuit It’s nice of Krogoth to fill in for Chuckula over the holidays.

Honestly, I didn’t expect ATI to address the R’s instruction pixel shader limit with this “half-generation” refresh chip, but they’ve apparently done so. However, as with traditional multi-pass approaches, pixel shader programs will have to be structured to account for the GPU’s per-pass rendering limitations.

Also, the company has tuned the chip’s memory controller to better arbitrate reads and writes during heavy use, which should especially help performance when rendering antialiased pixels.


128MB DDR Radeon 9800 Pro

128mv It’s nice of Krogoth to fill in for Chuckula over the holidays. In order to produce more complex effects, the R would have to resort to multi-pass rendering.

In all, the F-buffer is a crucial enhancement to the R that reasserts ATI’s technology leadership in graphics. That is, info about a pixel’s at on the Z axis. Multi-pass rendering is nifty because it overcomes a lot of technical limitations, but it’s a performance killer because it duplicates lots of work unnecessarily.

Steam names the best-selling games of My sense is that the NV30 chip in the GeForce FX offers a little more complexity and flexibility than the F-buffer approach, but the real-world differences in performance and rendering output are likely to be minor.

The Radeon Pro will debut with an effective MHz memory clock speed, which gives it a very healthy aati Finally, the R’s has an improved cache for Z-buffer reads and writes, to aid in the bandwidth-intensive task of handling pixel depth information.

F-buffer The most significant piece of new technology in the R, however, is more than a simple performance tweak.

ATI RADEON 9800 Pro, (128 MB) AGP Video Card

The R’s bit DDR memory interface runs at a higher clock speed, which allows the chip to have even more memory bandwidth than the Radeon Pro.

If you want to understand the technology from which the R is derived, please read our review. Your new graphics catch phrase: For instance, multi-pass rendering doesn’t handle transparent or translucent surfaces particularly well. ATI says this cache has been optimized to work better with stencil buffer data, which should help when developers peo stencil shadow volumes to create shadowing effects in future games like Doom III.


About us Privacy policy Mailing list Mobile. Like the R, the R is manufactured using 0. ATI has taken several measures to allow the R to put its memory bandwidth to good use. The concept is fundamentally simple, as many good innovations in computers are, but the impact of the change is profound.

The pixel shaders on the R chip are limited to program lengths of 64 instructions, which simply isn’t enough to create some of the more compelling shader effects developers might want to use. To understand why all of this multi-pass stuff matters and to get a sense why I get all hot and bothered when talking about DirectX 9-class hardware, go read my article about such things. Dell returns to the stock market after six years.

Mark and Kekoa Proudfoot at Stanford University. The key things you need to know about the R chip are fairly basic. ATI has addressed the R’s pixel shader limitations in R by implementing something called an F-buffer. LG HU85L projector needs but two inches to cast a 90″ picture.