Radeon HD 7870 vs 6870 X2 |
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Differences What are the advantages of each
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| Higher clock speed | 1,000 MHz | vs | 900 MHz | More than 10% higher clock speed | |||
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| Higher effective memory clock speed | 4,800 MHz | vs | 4,200 MHz | Around 15% higher effective memory clock speed | |||
| Higher memory clock speed | 1,200 MHz | vs | 1,050 MHz | Around 15% higher memory clock speed | |||
| Significantly lower TDP | 175W | vs | 300W | More than 40% lower TDP | |||
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| Is dual GPU | Yes | vs | No | About half of graphics cards are dual GPU | |||
| Much higher memory bandwidth | 268.8 GB/s | vs | 153.6 GB/s | More than 75% higher memory bandwidth | |||
| Better floating-point performance | 4,032 GFLOPS | vs | 2,560 GFLOPS | More than 55% better floating-point performance | |||
| Higher pixel rate | 57.6 GPixel/s | vs | 32 GPixel/s | 80% higher pixel rate | |||
| Significantly more render output processors | 64 | vs | 32 | Twice as many render output processors | |||
| Significantly more shading units | 2,240 | vs | 1,280 | 960 more shading units | |||
| Much wider memory bus | 512 bit | vs | 256 bit | 2x wider memory bus | |||
| Higher texture rate | 100.8 GTexel/s | vs | 80 GTexel/s | More than 25% higher texture rate | |||
| More texture mapping units | 112 | vs | 80 | 32 more texture mapping units | |||
| More compute units | 28 | vs | 20 | 8 more compute units | |||
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Features Key features of the Radeon HD 7870 vs 6870 X2
memory bandwidth Rate at which data can be read from or stored in onboard memory
pixel rate Number of pixels a graphics card can render to the screen every second
texture rate Speed at which a graphics card can perform texture mapping
floating point performance How fast the gpu can crunch numbers
shading units Subcomponents of the gpu, these run in parallel to enable fast pixel shading
texture mapping units Built into each gpu, these resize and rotate bitmaps for texturing scenes
Reviews Word on the street
Specifications Full list of technical specs
gpu | Radeon HD 7870 | vs | 6870 X2 |
|---|---|---|---|
| GPU brand | AMD | AMD | |
| GPU name | Pitcairn XT | Barts XT | |
| Market | Desktop | Desktop | |
| Clock speed | 1,000 MHz | 900 MHz | |
| Is dual GPU | No | Yes | |
| Reference card | None | None | |
raw performance | |||
| Shading units | 1,280 | 2,240 | |
| Texture mapping units | 80 | 112 | |
| Render output processors | 32 | 64 | |
| Compute units | 20 | 28 | |
| Pixel rate | 32 GPixel/s | 57.6 GPixel/s | |
| Texture rate | 80 GTexel/s | 100.8 GTexel/s | |
| Floating-point performance | 2,560 GFLOPS | 4,032 GFLOPS | |
memory | Radeon HD 7870 | vs | 6870 X2 |
|---|---|---|---|
| Memory clock speed | 1,200 MHz | 1,050 MHz | |
| Effective memory clock speed | 4,800 MHz | 4,200 MHz | |
| Memory bus | 256 bit | 512 bit | |
| Memory | 2,048 MB | 2,048 MB | |
| Memory type | GDDR5 | GDDR5 | |
| Memory bandwidth | 153.6 GB/s | 268.8 GB/s | |
noise and power | |||
| TDP | 175W | 300W | |
