HIS HD 7850 & HD 7870 GHz Edition

Author:	Jouni 'Jipa' Vasama
Published:	29.05.2012
Manufacturer:	HIS
Product Group:	Graphics cards
In English Suomeksi

Intro

Last year the vast majority of our graphic card reviews were about the AMD HD6-series of cards, the Cayman- and Barts cards. The year has changed and now there’s a brand new family of cards. This time we’ll take our first look into the HD 7-series when we review HIS’s new HD 7850 and HD 7870-cards.

HIS HD 7850 & HD 7870 GHz Edition -

The HIS HD 7850 and HD 7870 cards come packed in boxes very typical to HIS, the packaging clearly shows all the features of the card, and also the clock speeds are visible. Inside the package the card itself is extremely well padded inside a block of foam, so transport damage is highly unlikely to occur.

	Radeon HD 7970 (3,072MB)	Radeon HD 7950 (3,072MB)	Radeon HD 7870 (2,048MB)	Radeon HD 7850 (2,048MB)	Radeon HD 6970 (2,048MB)	Radeon HD 6870 (1,024MB)
Codename	Tahiti XT	Tahiti Pro	Pitcairn XT	Pitcairn Pro	Cayman XT	Barts XT
DX API	11.1	11.1	11.1	11.1	11	11
Architecture	GCN	GCN	GCN	GCN	VLIW	VLIW
Process	28nm	28nm	28nm	28nm	40nm	40nm
Transistors	4.3bn	4.3bn	2.8bn	2.8bn	2.64bn	1.70bn
Die Size	352mm²	352mm²	212mm²	212mm²	389mm²	225mm²
Processors	2,048	1,792	1,280	1,024	1,536	1,120
Default memory	3GB	3GB	2GB	2GB	2GB	1GB
Compute units	32	28	20	16	24	16
Texture Units	128	112	80	64	96	56
ROP Units	32	32	32	32	32	32
GPU Clock (MHz)	925	800	1,000	860	880	900
Shader Clock (MHz)	925	800	1,000	860	880	900
GFLOPS	3,789	2,867	2,560	1,761	2,703	2,016
Memory Clock (MHz)	5,500	5,000	4,800	4,800	5,500	4,200
Memory Bus (bits)	384	384	256	256	256	256
Max bandwidth (GB/s)	264	240	153,6	153,6	176	134,4
Power Connectors	8+6	6+6	6+6	6	8+6	6+6
TDP (watts)	250	200	175	130	250	150
GFLOPS per watt	15,15	14,34	14,63	13,55	10,81	13,44
CrossFire Support	4-way	4-way	2-way	2-way	4-way	2-way
Release MSRP	$549	$449	$349	$249	$369	$239

With the introduction of the HD 7-series came a new architecture and manufacturing process. The current generation is produced in 28 nm process, which helps lower the power consumption and die size despite the much higher transistor count. Also compared to the old HD 68-series, now even the HD 7850-model has 2 GB's of memory as standard.

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