AMD's RV770 to have 800 stream processors?


Radeon HD graphics cards tend to be more generously endowed than their Nvidia counterparts in the stream processor department, but AMD could take this trend to a whole new level with its next-generation RV770 graphics processor. According to a VR-Zone report that sources a Chinese website, the RV770 could be outfitted with a mind-blowing 800 stream processors spread out over five SP arrays. To put things in perspective, the RV670-based Radeon HD 3870 has "just" 320 SPs, and even the Radeon HD 3870 X2 only has a total of 640 SPs between its two GPUs.

This is only a rumor, of course. But another report—also by VR-Zone—suggests the RV770 graphics processor will have a die size of 250 mm². Since the upcoming GPU is said to be built using the same 55 nm process as the RV670, which measures just 192 mm², the RV770 may indeed end up with a substantial number of additional stream processors. Incidentally, VR-Zone points out that the rumored die size would still make the RV770 smaller than Nvidia's 334 mm² G92, and perhaps even smaller than a G92 chip shrunk down to 55 nm.

If recent rumors are to be trusted, the RV770 should show up some time next quarter as part of new Radeon HD 4000-series graphics cards (those same rumors peg the RV770's SP count at a somewhat more reasonable 480). Meanwhile, Nvidia is expected to counterattack with a die shrink of the G92 in a similar time frame.

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