ATI HD7870 review | KitGuru https://www.kitguru.net KitGuru.net - Tech News | Hardware News | Hardware Reviews | IOS | Mobile | Gaming | Graphics Cards Mon, 25 Jun 2012 15:59:25 +0000 en-US hourly 1 https://wordpress.org/?v=6.4.3 https://www.kitguru.net/wp-content/uploads/2021/06/cropped-KITGURU-Light-Background-SQUARE2-32x32.png ATI HD7870 review | KitGuru https://www.kitguru.net 32 32 Sapphire HD7870 FleX Edition Review https://www.kitguru.net/components/graphic-cards/zardon/sapphire-hd7870-flex-edition-review/ https://www.kitguru.net/components/graphic-cards/zardon/sapphire-hd7870-flex-edition-review/#comments Mon, 25 Jun 2012 15:59:25 +0000 http://www.kitguru.net/?p=97039 We have reviewed all of the Sapphire FleX graphics cards to date, and today we are looking at the new HD7870 FleX Edition, slotting in just below the HD7970 Dual-X FleX Edition, which we reviewed at the beginning of June. The HD7870 FleX ships with a modest factory overclock, dual fans and custom ‘FleX' display …

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We have reviewed all of the Sapphire FleX graphics cards to date, and today we are looking at the new HD7870 FleX Edition, slotting in just below the HD7970 Dual-X FleX Edition, which we reviewed at the beginning of June. The HD7870 FleX ships with a modest factory overclock, dual fans and custom ‘FleX' display technology only available with Sapphire discrete solutions.

This year Sapphire have produced a wide range of 7000 series cards sporting dual fan coolers, with a primary focus on lowering noise levels. Thanks to the use of high quality fans and clever non aggressive fan profiles these have been an ideal choice for many enthusiast users.

Product Sapphire HD7870 FleX Edition AMD HD7950 AMD HD7870 AMD HD7850
Core Clock speed 1050mhz 800mhz 1000mhz 860mhz
Transistors 2.8B 4.31B 2.8B 2.8B
Stream Processors 1,280 1,792 1,280 1,024
Compute Performance 2.56 TFLOPS 2.87 TFLOPS 2.56 TFLOPS 1.76 TFLOPS
Texture Units 80 112 80 64
Texture Fillrate 80 GT/s 89.6 GT/s 80 GT/s 55.0 GT/s
ROPs 32 32 32 32
Pixel Fillrate 32.0 GP/s 25.6 GP/s 32.0 GP/s 27.52 GP/s
Z/Stencil 128 128 128 128
Memory Type 2GB GDDR5 3GB GDDR5 2GB GDDR5 2GB GDDR5
Memory Clock 1,250mhz 1,250mhz 1,200mhz 1,200mhz
Memory Data Rate 5.0 Gbps 5.0 Gbps 4.8 Gbps 4.8 Gbps
Memory Bandwidth 153.6 GB/s 240 GB/s 153.6 GB/s 153.6 GB/s

The Sapphire HD7980 Flex Edition receives both a core clock and memory increase. The core speed has been enhanced by 50mhz, from 1,000mhz to 1,050 mhz. The memory speed has been boosted by 50mhz from 1,200mhz (4.8 Gbps effective) to 1,250mhz (5Gbps effective).

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AMD HD7870 and HD7850 Graphics Card Review https://www.kitguru.net/components/graphic-cards/zardon/amd-hd7870-and-hd7850-graphics-card-review/ https://www.kitguru.net/components/graphic-cards/zardon/amd-hd7870-and-hd7850-graphics-card-review/#comments Mon, 05 Mar 2012 05:00:08 +0000 http://www.kitguru.net/?p=81330 AMD launch the ‘Pitcairn' series of graphics cards today, completing their Trinity of new Direct X 11 discrete solutions. In previous months we analysed the ‘Tahiti' series HD7970 /HD7950 and the ‘Cape Verde' HD7770 and HD7750, targeting the ultra high and lower end price points respectively. The HD7870 and HD7850 are released to fill out …

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AMD launch the ‘Pitcairn' series of graphics cards today, completing their Trinity of new Direct X 11 discrete solutions. In previous months we analysed the ‘Tahiti' series HD7970 /HD7950 and the ‘Cape Verde' HD7770 and HD7750, targeting the ultra high and lower end price points respectively. The HD7870 and HD7850 are released to fill out the middle ground, aimed at the enthusiast user who wants plenty of bang for the buck.

AMD have thrown the discrete graphics market into turmoil this year with so many models available that the consumer has been left scratching his or her head in confusion. Which card to get if you want to play demanding games on an affordable 24 inch screen? Do you really need to cause serious injury to your credit card by picking up a HD7950? Is it really wise to spend your money on a last generation card such as the HD6950?

A quick look at the market right now is in order.

AMD's HD7970 and HD7950 are without question two of the fastest video cards on the market, but sadly for most people they remain a pipedream, just out of financial reach. The HD7950 is retailing around £360 inc vat and the HD7970 is still priced around £460 inc vat. It would be fair to say that the audience for either card will be small. The HD7770 and HD7750 on the other hand are reasonably priced between £85 and £130 inc vat, but they lack the grunt to attract the hardcore gaming enthusiast. There is currently a gaping hole in the market between £200 and £300 for AMD to fill.

Gamers have been waiting on a price point replacement for the HD6950 and HD6970, the last generation flagship models which span the gamut between £200 and £300. They will be addressing this problem today, a couple of months after the HD7970 was launched.

AMD have a lot riding on the success of the HD7870 and HD7850. History has indicated that the series of hardware just below the flagship models often deliver amazing performance without the hefty price premium. The AMD HD6950 for instance proved incredibly popular, thanks in part to the fact that some could be flashed to the same specifications as the more expensive HD6970.

So are the HD7850 and HD7870 going to satisfy the demanding enthusiast?

Product AMD HD7970 AMD HD7950 AMD HD7870 AMD HD7850
Core Clock speed 925mhz 800mhz 1000mhz 860mhz
Transistors 4.31 billion 4.31 billion 2.8 billion 2.8 billion
Stream Processors 2,048 1,792 1,280 1,024
Compute Performance 3.79 TFLOPS 2.87 TFLOPS 2.56 TFLOPS 1.76 TFLOPS
Texture Units 128 112 80 64
Texture Fillrate 118.4 GT/s 89.6 GT/s 80 GT/s 55.0 GT/s
ROPs 32 32 32 32
Pixel Fillrate 29.6 GP/s 25.6 GP/s 32.0 GP/s 27.52 GP/s
Z/Stencil 128 128 128 128
Memory Type 3GB GDDR5 3GB GDDR5 2GB GDDR5 2GB GDDR5
Memory Clock 1,375mhz 1,250mhz 1,200mhz 1,200mhz
Memory Data Rate 5.5 GBps 5.0 Gbps 4.8 Gbps 4.8 Gbps
Memory Bandwidth 264 GB/s 240 GB/s 153.6 GB/s 153.6 GB/s

Above, we have a graph showing the technical specifications of the Tahiti and Pitcairn cards. Both HD7870 and HD7850 are built around 2.8 billion transistors, down from the staggering 4.31 billion on both HD7970 and HD7950 designs. The HD7870 is shipped with a very high core clock of 1 GHZ and the HD7850 is downclocked to 860mhz. We will expect AMD partners to ignore these reference clock speeds with upcoming custom overclocked versions. But that is for another day.

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