Mobility Radeon HD 4850 X2 vs 3870 X2 |
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Differences What are the advantages of each
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| Higher memory bandwidth | 179.2 GB/s | vs | 108.8 GB/s | Around 65% higher memory bandwidth | |||
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| More memory | 2,048 MB | vs | 1,024 MB | 2x more memory | |||
| Higher effective memory clock speed | 2,800 MHz | vs | 1,700 MHz | Around 65% higher effective memory clock speed | |||
| Significantly more shading units | 1,600 | vs | 640 | 960 more shading units | |||
| Better floating-point performance | 1,600 GFLOPS | vs | 844.8 GFLOPS | Around 90% better floating-point performance | |||
| More texture mapping units | 80 | vs | 32 | 48 more texture mapping units | |||
| More compute units | 20 | vs | 8 | 12 more compute units | |||
| Higher texture rate | 40 GTexel/s | vs | 21.12 GTexel/s | Around 90% higher texture rate | |||
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| Higher clock speed | 660 MHz | vs | 500 MHz | More than 30% higher clock speed | |||
| Higher memory clock speed | 850 MHz | vs | 700 MHz | More than 20% higher memory clock speed | |||
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Features Key features of the Mobility Radeon HD 4850 X2 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 | Mobility Radeon HD 4850 X2 | vs | 3870 X2 |
|---|---|---|---|
| GPU brand | ATI | ATI | |
| GPU name | M98 | M88 | |
| Market | Laptop | Laptop | |
| Clock speed | 500 MHz | 660 MHz | |
| Is dual GPU | Yes | Yes | |
| Reference card | None | None | |
raw performance | |||
| Shading units | 1,600 | 640 | |
| Texture mapping units | 80 | 32 | |
| Render output processors | 32 | 32 | |
| Compute units | 20 | 8 | |
| Pixel rate | 16 GPixel/s | 21.12 GPixel/s | |
| Texture rate | 40 GTexel/s | 21.12 GTexel/s | |
| Floating-point performance | 1,600 GFLOPS | 844.8 GFLOPS | |
memory | Mobility Radeon HD 4850 X2 | vs | 3870 X2 |
|---|---|---|---|
| Memory clock speed | 700 MHz | 850 MHz | |
| Effective memory clock speed | 2,800 MHz | 1,700 MHz | |
| Memory bus | 512 bit | 512 bit | |
| Memory | 2,048 MB | 1,024 MB | |
| Memory type | GDDR5 | GDDR3 | |
| Memory bandwidth | 179.2 GB/s | 108.8 GB/s |
