Radeon HD 7900 series gets new architecture and XDR2 Rambus memory?

[pistolp]

Source: Radeon HD 7900 series gets new architecture and XDR2 Rambus memory?

Radeon HD 7000 will like the current 6000 family launch in steps and with different base architectures. If we are to believe the latest information that is said to come from AMD's leaked roadmap the graphics card marker is aiming for a first launch in Q4 2011. Then it will be the latest VLIW4 architecture (Very Long Instruction Word) that is on the menu and it will most likely have the same base as the Radeon HD 6900 series. An archtiecture that will be more efficient than VLIW5 that was used by other Radeon HD 6000 cards.

AMD is planning four different GPUs based on the 28nm version of the VLIW4 architecture and use them in three different series, Radeon HD 7800, HD 7600 and HD 7500. The four GPUs will be equipped with 768 to 1536 Radeon cores (stream processors) and GDDR5 memory in high speeds.

Graphics card	Radeon HD 7870	Radeon HD 7850	Radeon HD 7670	Radeon HD 7570
Node	TSMC 28nm HPL	TSMC 28nm HPL	TSMC 28nm HPL	TSMC 28nm HPL
Architecture	VLIW4	VLIW4	VLIW4	VLIW4
GPU	Thames XT	Thames Pro	Lombok XT	Lombok Pro
Radeon cluster	24	22	12	12
Radeon cores	1536	1408	768	768
GPU frequency	950 MHz	850 MHz	900 MHz	750 MHz
Texture units	96	88	48	48
ROPs	32	32	16	16
Graphics memory	2GB GDDR5	2GB GDDR5	1GB GDDR5	1GB GDDR5
Memory frequency	5800 MHz	5200 MHz	5000 MHz	4000 MHz
Memory interface	256 bit	256 bit	128 bit	128 bit
Memory bandwidth	186 GB/s	166 GB/s	80 GB/s	64 GB/s
Power consumption	120 watt	90 watt	60 watt	50 watt

Graphics card	Radeon HD 7970	Radeon HD 7950	Radeon HD 6970
Node	TSMC 28nm HP	TSMC 28nm HP	TSMC 40nm
Architecture	GCN	GCN	VLIW4
GPU	Tahiti XT	Tahiti Pro	Cayman XT
Radeon cluster	32	30	24
Radeon cores	2048	1920	1536
GPU frequency	1000 MHz	900 MHz	880 MHz
Texture units	128	120	96
ROPs	64	64	32
Graphics memory	2GB XDR2	2GB XDR2	2GB GDDR5
Memory frequency	8000 MHz	7200 MHz	5500 MHz
Memory interface	256 bit	256 bit	256 bit
Memory bandwidth	256 GB/s	230 GB/s	176 GB/s
Power consumption	190 watt	150 watt	250 watt