[Op-ed/Opinion] Why AMD needs an R9 280 or R9 270XT tweaked Tahiti Pro /Tahiti LE rebrand and fast.

R9 290X

The current state of the market is quite odd. The holidays have gone already and R9 290X, R9 290, and R9 280X are all pushing ludicrous prices , asking $50-100 over MSRP.

The second issue is power draw. R9 280X, R9 290, R9 290X have over 250W peak power draw.

The R9 270X is a badly priced SKU simply because aftermarket versions are running too high a premium over the R9 270 aftermarket versions. There is no discernible difference other than power delivery and market segmentation. R9 270s typically pack fewer power phases due to the 150W TDP limit in place due to the existence of only one 6 pin power connector. They also typically clock lower because of that (less power available, yet ASUS boards with 6 phases have been seen to hit a respectable 1100MHz on par with R9 270X).

The R9 270 is what the R9 270X ought to have been. Gigabyte’s R9 270 is a mockery of this: they literally use the R9 270X PCB with 2 fewer power phases and a cheaper heatsink with less heatpipes , one less fan, and less overall fin area. The R9 270X 4GB boards coming lately are an improvement over the original iteration of the R9 270X with only 2GB VRAM , yet we have no indications on whether the 4GB is slower VRAM. It also seems all the major aftermarket cards do not incorporate VRM heatsinks however.

A R9 280 using a Tahiti Pro (1792 shader, 112 TMU , 28 CU, 384-bit memory) would be a pleasant continuation of the HD7950Boost, especially since a mature 28nm process would provide better efficiency. This would be excellent for the product lineup against the likes of the $250 MSRP GTX 760 , which is weaker than the GTX 670.

A R9 270xt / R9 275 using re-purposed / Mac Pro Firepro D500 (1536 shader , 96 TMU, 24 CU, 384-bit memory) is another possibility, if R9 280 launched. It’d be a little weaker than the midpoint (1664 shader / 104 TMUs / 26CU) between a R9 280X (2048 shader / 128 TMUs / 32 CU) and R9 270X / R9 270 (1280 shader / 80 TMUs / 20 CU). This would have to be stimulated by a $200-220 GTX 750 Ti, it isn’t going to happen otherwise.

The AMD lineup would end up:
R9 290X : 2816 shaders (TrueAudio) , 176 TMU
R9 290 : 2560 shaders (TrueAudio), 160 TMU
<– ~$350 MSRP R9 290 LE / R9 280XT? (2304 shaders, TrueAudio) , the other better option is to price drop R9 290X by $50, R9 290 by $20?, R9 280X by $20 , R9 270X by $20 / R9 270 by $10 to facilitate the need for only one SKU at ~$250
R9 280X /Firepro W9000 /Firepro D700: 2048 shaders , 128 TMU
<– R9 280? /HD7950 /Firepro S9000/Firepro W8000 (256-bit memory) / Sky 700: 1792 shaders , 112 TMU
<– R9 270XT? / R9 275? / Firepro D500: 1536 shaders , 96 TMU
R9 270X (rumored on VRzone) / R9 270 /Firepro W7000 / Firepro D300 / Firepro S7000 / Sky 500: 1280 shaders . 80 TMU
R7 265 / HD 7850 : 1024 shaders , 64 TMU
R7 260X (TrueAudio)/ HD7790 / R9 260 OEM : 896 shaders , 56 TMU
R7 260 (TrueAudio) : 768 shaders , 48 TMU
HD7770 : 640 shaders
R7 250X: 640 shaders , 40 TMU, TrueAudio or another bad rebrand (of HD7770)?—- updated for Feb 5 announcement/rumor
HD7750 / R9 255 OEM /Firepro W600: 512 shaders , 32 TMU
R7 250 / HD7730 : 384 shaders , 24 TMU

* one CU (Compute unit) contains 64 shaders but it seems AMD tends to disable 256 shaders (4 CUs) on Hawaii/Tahiti/Pitcairn and 128 (2 CU) on Bonaire and Cape Verde
Hawaii (44 CU) can have 2816 shaders, 2752 , 2688 , 2624 , 2560 , 2496 , 2432 . 2368 , 2304 , 2240 , 2176 , 2112 , and a possible 2048 shaders overlap with Tahiti
Tahiti (32 CU) can have 2048 shaders, 1984 shaders, 1920 shaders, 1856 shaders, 1792 shaders, 1728 shaders,1664 shaders, 1600 shaders, 1536 shaders, 1472 shaders , 1408 shaders , 1344 shaders
Pitcairn (20 CU) can have 1280 shaders, 1216 shaders, 1152 shaders, 1088 shaders, 1024 shaders , 960 shaders, 896 shaders, 768 shaders (See Firepro W5000)
Bonaire (14 CU) can have 896 shaders, 832 shaders, 768 shaders, 704 shaders
Cape Verde (10 CU) can have 640 shaders , 576 shaders, 512 shaders , 384 shaders , 320 shaders

Hawaii has 8 ACEs, 4 rasterizers/geometry processors that are decoupled into 4 shader engines , 512-bit memory bus , Crossfire XDMA, True Audio , 16 render back ends (4 per shader engine)= 64ROPs
Tahiti has two geometry engine/rasterizer front end with 2 ACEs , 384-bit memory bus , 8 render back ends = 32 ROPs
Pitcairn has 8 render back ends (32 ROPs) and 256-bit memory bus
Bonaire has only 4 render back ends (16 ROPs) and 128-bit memory bus
Cape Verde has only one geometry engine/rasterizer front end but has 2 ACEs (and 4 Render back ends like Bonaire) and 128-bit memory bus

Nvidia lineup:
GTX 780 Ti /Quadro K6000 /Tesla K40: 2880 CUDA cores (240 TMU)
GTX TITAN or GTX TITAN replacement with double precision neutered / Tesla K20X : 2688 CUDA cores (224 TMU)
Tesla K20 : 2496 CUDA cores
GTX 780 :2304 CUDA cores (192 TMU)
<— 1920 CUDA GK110 (GTX 770 Ti OEM)? Nvidia is still playing a losing game at the $400 pricepoint.
GTX 770 /Quadro K5000: 1536 CUDA cores , 128 TMU
<— rebrand GTX 670 GTX 760 Ti? : 1344 CUDA cores, 112 TMU
GTX 760 : 1152 CUDA cores (replaced GTX 660Ti) , 96 TMU
GTX 660 : 960 CUDA cores, 80 TMU
GTX 650 Ti Boost /Quadro K4000: 768 CUDA cores , 64 TMU
GTX 750 Ti 640 CUDA – Maxwell on 28nm process , 40 TMU, 16 ROP
GTX 750: 512 CUDA – Maxwell on 28nm , 32 TMU , 16 ROP
GTX 650 Ti : 768 CUDA cores , 64 TMU
GTX 645 OEM: 576 CUDA cores
GTX 650/GT 640/ GT 630 Rev 2 /GT 635 OEM /quadro K2000: 384 CUDA cores , 32 TMU
GT 630 OEM / Quadro K600: 192 CUDA cores , 16 TMU

* Each Kepler SMX contains 192 CUDA cores, as such you can have
GK110: 2880, 2688, 2496, 2304, 2112 , 1920 , 1728 , with 1536 CUDA cores also a possibility
GK104: 1536 , 1344 , 1152 , with 960 CUDA cores also a possibility
GK106: 960 , 768 , 576
GK107/GK208: 384 , 192

* There’s a bunch of Nvidia Grid GPUs using GK104 and GK107
GK110 384-bit memory bus , 5 raster engines(1 per GPC , 3 SMX per GPC) ,48 ROPs
GK104 256-bit memory bus , 4 raster engines(1 per GPC , 2 SMX per GPC), 32 ROPs
GK106 192-bit memory bus , 3 raster engines (1 per GPC , 2 SMX per GPC), 24 ROPs (16 on GTX 650 Ti)
GK107 128-bit memory bus , 1 raster engine (1 per GPC, 2 SMX per GPC), 16 ROPs

* MAXWELL 28nm
GM107: 640 CUDA, 512 CUDA ??? rumored 16 ROPs
GM108: ???
* MAXWELL 20nm:
GM200
GM204
GM206

Reference:
http://www.geforce.com/whats-new/articles/geforce-gtx-660-650-launch#1

Quote:

You see, PC gamers love technology, but they’re also very value conscious, with most preferring to spend only $100 to $250 on a video card upgrade.

9 thoughts on “[Op-ed/Opinion] Why AMD needs an R9 280 or R9 270XT tweaked Tahiti Pro /Tahiti LE rebrand and fast.”

  1. I don't really get the point in rebranding all kinds of things over and over again most people here already have their tech and for those that don't it is better to wait for Pirate Islands and Maxwell in Q3.

    Card design and chip design even with pre existing IP is expensive and making extra in doors SKU's isn't a smart thing for AMD to spend money on the downside of this is that the money is spend from the AIB's budget which will get back to us the enthusiasts in the price. (the extra 50/100 dolla premium in the US seems to be due to the mining craze which we don't have because power is crazy expensive here in Europe)

  2. AMD worked their way into a predicament by releasing a single new IP and trying to rebrand the previous generation. Yeah, they're all GCN, but the point of a new generation is to release new cards, not new names. I think Hawaii should have been a 7-series card, or there needs to be new IP with tangible improvements across the board.

  3. The wonky prices on AMD cards are due to people snatching them up to do virtual coin mining

    Once the crazy dies (if that ever happens) the card prices will be sane again

  4. Jharel, even if the prices were back to MSRP it'd still be bad if the older gen cards are still on warranty and still in shops.

    nvidiaftw12, There's plenty of articles worthy of reading here. It's just most aren't updated often if at all. (the article system isn't conducive to discussions either…)

  5. Ha. Lol, I doubt it. Most of peoples are just really bad opinions with their thoughts not at all organized, drafts, or tutorials with have been cover much better many more time.

    There are some, but I can't say that they aren't few and far between. The article section needs a serious makeover including the ability to rep.

  6. In my opinion adding Maxwell into the Nvidia line-up and comparing it based on SPUs and TMUs is a little misleading if Maxwell's performance boost is any indication. Still, it is a current GPU. The 384 and 320 shader Cape Verde chips you're referencing, sans the 7730, are actually Oland (R7 240 and 250) which is GCN 1.1 IIRC. AMD is also sort-of producing 1152 shader chips, but they're for the PS4's APU.

    Anyway, good read, and they really should have named the 270X 270 and a 7870XT rebrand 270X. The R9 280 has been in the proposed line-up for a bit but for some reason has not been released yet.

Leave a Reply

Your email address will not be published. Required fields are marked *

Recommended