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HIS HD 7850 & HD 7870 GHz Edition



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