Monday, May 19th 2014

AMD Readies 28 nm "Tonga" to Take on GM107

NVIDIA's energy-efficiency leap achieved on existing 28 nanometer process, using the "Maxwell" based GM107, appears to have rattled AMD. The company is reportedly attempting a super-efficient, 28 nm, mid-range chip of its own, codenamed "Tonga." The chip could power graphics cards that compete with the GeForce GTX 750 Ti and GTX 750. The chip is likely to be based on Graphics CoreNext 2.0 micro-architecture, the same one that drives "Hawaii," which means AMD isn't counting on the micro-architecture for efficiency gains. It could feature an evolution of PowerTune, which works closer to the metal than its existing implementation on "Hawaii." Other features could include Mantle, TrueAudio, and perhaps even XDMA CrossFire (no cables needed). The chip could be wired to up to 2 GB of memory.

Another equally plausible theory doing rounds is that "Tonga" could be a replacement to "Tahiti Pro," designed to compete with the GK104 at much lower power footprint (than "Tahiti"), so AMD could more effectively compete with the GeForce GTX 760. The chip could be similar in feature-set to "Tahiti," with a narrower memory bus (256-bit wide), but higher clock speeds to make up for it. If this theory holds true, then "Tonga" could disrupt both Tahiti Pro and "Curacao XT." Curacao XT (R9 270X) is designed to offer a value-conscious alternative to the $250 GTX 760. The R9 280 is competitive in performance, but takes a beating on the energy-efficiency front, and is also costlier to manufacture, due to the higher transistor count and four additional memory chips. We could hear more at Computex 2014.

Source: VideoCardz
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27 Comments on AMD Readies 28 nm "Tonga" to Take on GM107

#1
vagxtr
The Von Matrices said:
That's two different architectures; the OP states that this new GPU will use the same architecture as the old one. A better comparison is the 3870 to 4870, which were both on the 55nm process and both used VLIW5, although the 4870 did have architectural tweaks compared to the 3870. The OP indicates that the new GPU doesn't even have that opportunity to improve performance.
You comparing years of stiched up r&d to be delivered as stillborn performing gpu called hd2900xt at nearly exclusively ATi used 80nm for it after rather successful test batch rv570, and aside from quite few small dies named nvidia 8500/8600 series which were badly packed after production. So AMD take what they had and just dumb shrinked it to 55nm to make it viable product and rebrand it to hd3870 (rv670). While hd4870 was cleanup job from done from solid grounds. They actually revised everything they could from way better mc to vliw5 pipeline actually being accompanied with so necessary more texturing and filtering units to actually fix up broken rops on r600/rv670 series. I guess with r600 2.5 or as they call it rv770 they actually done job what they meant to be done year and half earlier but only this time with graciousness from amds cpu business money pouring into years of bad managed atis r&d which was used as camouflage for sucking money out of company.

Anyway much could be done but as rumors go on this new 28nm chip will only maybe stitch broken power features that occurs as black screen of death in many bonaire (hd7790/r7 260(x)) and hawaii based chips, and solve issues for amd that it needs to produce big die as hawaii as they pretty much depleted that cherry picked chips that they been collecting for never trully launched hd7990 as there was no real market for 500W+ power hog aside marketing purpose to have king of the hill.
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#2
Prima.Vera
Bring on the Tanga chip. Is summer anyways! :))
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