Radeon HD 4720 vs 3870 X2 |
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Differences What are the advantages of each
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| Significantly lower TDP | 55W | vs | 165W | 3x lower TDP | |||
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| Is dual GPU | Yes | vs | No | About half of graphics cards are dual GPU | |||
| Significantly higher memory bandwidth | 115.32 GB/s | vs | 21.34 GB/s | Around 5.5x higher memory bandwidth | |||
| Higher clock speed | 825 MHz | vs | 600 MHz | Around 40% higher clock speed | |||
| Higher pixel rate | 26.4 GPixel/s | vs | 4.8 GPixel/s | 5.5x higher pixel rate | |||
| Much wider memory bus | 512 bit | vs | 128 bit | 4x wider memory bus | |||
| Significantly more render output processors | 32 | vs | 8 | 24 more render output processors | |||
| Higher effective memory clock speed | 1,802 MHz | vs | 1,334 MHz | More than 35% higher effective memory clock speed | |||
| Better floating-point performance | 1,056 GFLOPS | vs | 384 GFLOPS | 2.8x better floating-point performance | |||
| More shading units | 640 | vs | 320 | Twice as many shading units | |||
| Higher memory clock speed | 901 MHz | vs | 667 MHz | More than 35% higher memory clock speed | |||
| Slightly more compute units | 8 | vs | 4 | Twice as many compute units | |||
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Features Key features of the Radeon HD 4720 vs 3870 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 4720 | vs | 3870 X2 |
|---|---|---|---|
| GPU brand | ATI | ATI | |
| GPU name | RV730 | R680 | |
| Market | Desktop | Desktop | |
| Clock speed | 600 MHz | 825 MHz | |
| Is dual GPU | No | Yes | |
| Reference card | None | None | |
raw performance | |||
| Shading units | 320 | 640 | |
| Texture mapping units | 32 | 32 | |
| Render output processors | 8 | 32 | |
| Compute units | 4 | 8 | |
| Pixel rate | 4.8 GPixel/s | 26.4 GPixel/s | |
| Texture rate | 19.2 GTexel/s | 26.4 GTexel/s | |
| Floating-point performance | 384 GFLOPS | 1,056 GFLOPS | |
memory | Radeon HD 4720 | vs | 3870 X2 |
|---|---|---|---|
| Memory clock speed | 667 MHz | 901 MHz | |
| Effective memory clock speed | 1,334 MHz | 1,802 MHz | |
| Memory bus | 128 bit | 512 bit | |
| Memory | 1,024 MB | 1,024 MB | |
| Memory type | GDDR3 | GDDR3 | |
| Memory bandwidth | 21.34 GB/s | 115.32 GB/s | |
noise and power | |||
| TDP | 55W | 165W | |
