Monday, September 27th 2010
AMD Radeon HD 6700 Series ''Barts'' Specs Sheet Surfaces
Here is the slide we've been waiting for, the specs sheet of AMD's next-generation Radeon HD 6700 series GPUs, based on a new, radically redesigned core, codenamed "Barts". The XT variant denotes Radeon HD 6770, and Pro denotes HD 6750. AMD claims that the HD 6700 series will pack "Twice the Horsepower", over previous generation HD 5700 series. Compared to the "Juniper" die that went into making the Radeon HD 5700 series, Barts features twice the memory bandwidth thanks to its 256-bit wide high-speed memory interface, key components such as the SIMD arrays split into two blocks (like on Cypress), and we're now getting to learn that it uses a more efficient 4-D stream processor design. There are 1280 stream processors available to the HD 6770 (Barts XT), and 1120 stream processors to the HD 6750 (Barts Pro). Both SKUs use the full 256-bit memory bus width.
The most interesting specification here is the shader compute power. Barts XT churns out 2.3 TFLOP/s with 1280 stream processors, GPU clocked at 900 MHz, while the Radeon HD 5870 manages 2.72 TFLOP/s with 1600 stream processors, 850 MHz. So indeed the redesigned SIMD core is working its magic. Z/Stencil performance also shot up more than 100% over the Radeon HD 5700 series. Both the HD 6770 and HD 6750 will be equipped with 5 GT/s memory chips, at least on the reference-design cards, which are technically capable of running at 1250 MHz (5 GHz effective), though are clocked at 1050 MHz (4.20 GHz effective) on HD 6770, and 1000 MHz (4 GHz effective) on HD 6750. Although these design changes will inevitably result in a larger die compared to Juniper, it could still be smaller than Cypress, and hence, more energy-efficient.
Source:
PCinLife
The most interesting specification here is the shader compute power. Barts XT churns out 2.3 TFLOP/s with 1280 stream processors, GPU clocked at 900 MHz, while the Radeon HD 5870 manages 2.72 TFLOP/s with 1600 stream processors, 850 MHz. So indeed the redesigned SIMD core is working its magic. Z/Stencil performance also shot up more than 100% over the Radeon HD 5700 series. Both the HD 6770 and HD 6750 will be equipped with 5 GT/s memory chips, at least on the reference-design cards, which are technically capable of running at 1250 MHz (5 GHz effective), though are clocked at 1050 MHz (4.20 GHz effective) on HD 6770, and 1000 MHz (4 GHz effective) on HD 6750. Although these design changes will inevitably result in a larger die compared to Juniper, it could still be smaller than Cypress, and hence, more energy-efficient.
245 Comments on AMD Radeon HD 6700 Series ''Barts'' Specs Sheet Surfaces
I can't help but keep bringing it up, yes i know the barts spec's are looking very nice but it is still the caymen chip that has me the most excited as it is the chip that could stop me buying a pair of gtx460's.
If you're impressed by barts then caymen should be monstrous. Just hope it's decently priced.
It's inevitable that we will get single GPU cards that will beat out a 5970, that's the way of technology, but i sure as well wouldn't pay $1000 for it.
Then again if you're rich and can spend that kind of money on hardware, then have at it. I'll be going with whatever is below that card more likely. lol
AMD Radeon HD 6870 and 6850 launches on October 18th
What do you all think about that?
because cayaman will still be 32rops and 256bit bus?
so much of 1920:120:32 or 2560:128:"32" + 256biy bus + 7GT GDDR5 ram :D unless amd just want to make mainstream card only but that'll be different story.
let me tell you something about bus currently both NV and amd are using 32bit bus per ring which on 512bit(2900xt, gtx280) it will need 16 ram ic to maintain the hard wiring on PCB layout design...however if they can tweak the ping bus size from 32bit to 64 bit per ring then here we go...a 512bit bus.i'd like to wait for that announcement as well :D which how much you want to bet for cayman's official specification? :D