Xbox 360 GPU Explained - tech
(hx) 03:50 PM EDT - May,19 2005
HardOCP sat down with Bob Feldstein, VP of Engineering at ATI, and lead sled dog on the Xbox 360 GPU development team to get the lowdown on just what the XBox 360's graphic unit is capable of. Here's an excerpt:
The Xbox 360 Smart 3D Memory is a relatively small piece of DRAM sitting off to the side of the GPU but yet on the same substrate. The Smart 3D Memory weighs in at only 10MB. Now the first thing that you might think is, "Well what the hell good is 10MB in the world of 512MB frame buffers?" And that would be a good line of questioning. The "small" 10MB of Smart 3D memory that is currently being built by NEC will have an effective bus rate between it and the GPU of 2GHz. This is of course over 3X faster that what we see on the high end of RAM today.
Inside the Smart 3D Memory is what is referred to as a 3D Logic Unit. This is literally 192 Floating Point Unit processors inside our 10MB of RAM. This logic unit will be able to exchange data with the 10MB of RAM at an incredible rate of 2 Terabits per second. So while we do not have a lot of RAM, we have a memory unit that is extremely capable in terms of handling mass amounts of data extremely quickly. The most incredible feature that this Smart 3D Memory will deliver is "antialiasing for free" done inside the Smart 3D RAM at High Definition levels of resolution. (For more of just what HiDef specs are, you can read here. Yes, the 10MB of Smart 3D Memory can do 4X Multisampling Antialiasing at or above 1280x720 resolution without impacting the GPU. So all of your games on Xbox 360 are not only going to be in High Definition, but all will have 4XAA applied as well.
Another article can be found on
TechReport.
Тут и перевод то особенно не нужен...идет объяснение к примеру почему у графической подсистемы всего 10 метров памяти (а они хитрецы используют оказывается мега супер быструю память на недецкой шине)...