Technical data / specifications

The ASUS EAH 6990 has been built according to AMDs reference design which features a massive dual slot cooler and a back plate to cover and protect the cards PCB. It's not like the predecessor, the Radeon HD 5970 which was a dual 5870 with much lower frequencies. This time AMD put two Radeon HD 6970 GPUs onto one single PCB. With a total of 3'072 Shader units, 4 GByte of GDDR5 memory and the original clock speeds from the HD 6970 except the memory being clocked at 5'000 MHz instead of 5'500 MHz this thing really is a monster. Furthermore the Radeon HD 6990 comes with two BIOS: the first one clocks the core at 830 MHz with 1.12 V for ending up with a TPD of 350W. The second BIOS clocks the core at 880Mhz at 1.175 V and the TDP ending up at a massive 450W.

	ASUS EAH6990 Unlocked	ASUS EAH6990	Radeon HD 6970	Radeon HD 6950	Radeon HD 5870
Chip	2x Cayman XT	2x Cayman XT	Cayman XT	Cayman Pro	Cypress XT
Process	40 nm	40 nm	40 nm	40 nm	40 nm
Transistors	5.28 billion	5.28 billion	2.64 billion	2.64 billion	2.15 billion
GPU clock	880 MHz	830 MHz	880 MHz	800 MHz	850 MHz
Shader clock	880 MHz	830 MHz	880 MHz	80 MHz	850 MHz
Memory	2x 2'048 MB GDDR5	2x 2'048 MB GDDR5	2'048 MB GDDR5	2'048 MB GDDR5	1'024 MB GDDR5
Memory clock	1'250 MHz	1'250 MHz	1'375 MHz	1'250 MHz	1'200 MHz
Memory interface	256 Bit	256 Bit	256 Bit	256 Bit	256 Bit
Memory bandwidth	160'000 MB/s	160'000 MB/s	176'000 MB/s	160'000 MB/s	153'600 MB/s
TMUs	2x 96	2x 96	96	88	80
TAUs	2x 96	2x 96	96	88	80
Shader Cores	2x 384 (4D)	2x 384 (4D)	384 (4D)	352 (4D)	320 (5D)
ROPs	2x 32 ROP	2x 32 ROP	32 ROP	32 ROP	32 ROP
Shader model	SM 5	SM 5	SM 5	SM 5	SM 5
Maximum board power	450 Watt	350 Watt	250 Watt	200 Watt	188 Watt

Page 1 - Introduction	Page 6 - Futuremark
Page 2 - Specifications	Page 7 - Unigine Heaven / Stone Giant
Page 3 - Preview / Delivery	Page 8 - World in Conflict / Resident Evil 5
Page 4 - Overclocking	Page 9 - Call of Juarez / Far Cry 2
Page 5 - Testing conditions	Page 10 - Conclusion

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