Timothy Miller wrote:
On 5/9/05, Sam Keshavarzi <[EMAIL PROTECTED]> wrote:Based on those numbers we would be comparable (roughly) to the original Radeon DDR card, though at less textures per pixel. As a comparison, then Radeon had a 183Mhz core clock and 2 pixel pipes. It was capable of around 1100Mtexels (texture pixels) (1.1 * 10**9) per second at 3 textures per pixel. Memory bandwidth was 5.9GB/s (5.9 * 10**9).
Hi guys!
I've been following the mailing list with great interest for quite a
while now, but there's one question I haven't seen a good answer to yet.
What is the expected 3D performance from this card compared to other
cards currently on the market? (specifically gaming performance)
First of all, it's not intended to run games. It WILL run games, but if some game doesn't perform so well, it won't bother us very much.
Secondly, it's hard to say exactly how it will perform compared to other cards. The expected memory bandwidth is 1.6 * 10**9 pixels/sec. (6.4 * 10**9 bytes/sec) For many applications, all of that memory bandwidth will get used, so you can use that as the standard for comparison.
IIRC we are targeting a 200Mhz clock and as Timothy said, 6.4MB/s (6.4 * 10**9) memory bandwidth. I am currently assuming for the sake of math, 1 pixel pipe, though I know there has been discussions surrounding that. Another card that MIGHT be a reasonable comparison would be the Radeon 9200 though it has a faster (250Mhz) clock. For those who are more nVidia oriented, think GeForce FX 5200. For a good, if someone dated list of cards and raw performance numbers, see here: http://techreport.com/etc/comparo/graphics/
In a single textured environment we might be able to hold our own. In a multi textured environment, we will be n (where n is the number of textures per pixel) times slower.
That should give folks somewhat of a baseline. I would offer a BIG word of caution though. It's all just speculation. It may be faster, it may be slower. We will have a much better idea once we have something of a core to work with. We all complain about paper launches and the Mhz race, we should try very hard not to get caught up in it ourselves. We also don't want to get peoples hopes up and not be able to deliver. The general public (ie the Slashdot crowd) is already going to be sorely disappointed at the final performance especially for the price. We don't want to make it worse.
I'll be quite proud and excited to make the thing work. I'm not worried about speed. I've got a Radeon 9800 Pro in my main machine, but all my other Linux boxes has TNT or RageII based cards. I'll be quite excited if I can get rid of them.
Patrick M _______________________________________________ Open-graphics mailing list [email protected] http://lists.duskglow.com/mailman/listinfo/open-graphics List service provided by Duskglow Consulting, LLC (www.duskglow.com)
