Radeon HD 7770 vs 5770 X2 |
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Differences What are the advantages of each
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| Higher clock speed | 1,000 MHz | vs | 850 MHz | Around 20% higher clock speed | |||
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| Is dual GPU | Yes | vs | No | About half of graphics cards are dual GPU | |||
| Significantly higher memory bandwidth | 153.6 GB/s | vs | 72 GB/s | Around 2.2x higher memory bandwidth | |||
| Better floating-point performance | 2,720 GFLOPS | vs | 1,280 GFLOPS | Around 2.2x better floating-point performance | |||
| More memory | 2,048 MB | vs | 1,024 MB | 2x more memory | |||
| Significantly more shading units | 1,600 | vs | 640 | 960 more shading units | |||
| Higher texture rate | 68 GTexel/s | vs | 40 GTexel/s | 70% higher texture rate | |||
| More render output processors | 32 | vs | 16 | Twice as many render output processors | |||
| More texture mapping units | 80 | vs | 40 | Twice as many texture mapping units | |||
| Higher pixel rate | 27.2 GPixel/s | vs | 16 GPixel/s | 70% higher pixel rate | |||
| More compute units | 20 | vs | 10 | Twice as many compute units | |||
| Wider memory bus | 256 bit | vs | 128 bit | 2x wider memory bus | |||
| Slightly higher memory clock speed | 1,200 MHz | vs | 1,125 MHz | More than 5% higher memory clock speed | |||
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Features Key features of the Radeon HD 7770 vs 5770 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
Specifications Full list of technical specs
gpu | Radeon HD 7770 | vs | 5770 X2 |
|---|---|---|---|
| GPU brand | AMD | ATI | |
| GPU name | Cape Verde XT | Juniper | |
| Market | Desktop | Desktop | |
| Clock speed | 1,000 MHz | 850 MHz | |
| Is dual GPU | No | Yes | |
| Reference card | None | ATi Radeon HD 5770 X2 850 MHz 2 GB | |
raw performance | |||
| Shading units | 640 | 1,600 | |
| Texture mapping units | 40 | 80 | |
| Render output processors | 16 | 32 | |
| Compute units | 10 | 20 | |
| Pixel rate | 16 GPixel/s | 27.2 GPixel/s | |
| Texture rate | 40 GTexel/s | 68 GTexel/s | |
| Floating-point performance | 1,280 GFLOPS | 2,720 GFLOPS | |
memory | Radeon HD 7770 | vs | 5770 X2 |
|---|---|---|---|
| Memory clock speed | 1,125 MHz | 1,200 MHz | |
| Effective memory clock speed | 4,500 MHz | 4,800 MHz | |
| Memory bus | 128 bit | 256 bit | |
| Memory | 1,024 MB | 2,048 MB | |
| Memory type | GDDR5 | GDDR5 | |
| Memory bandwidth | 72 GB/s | 153.6 GB/s |
