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Radeon HD 4850 1GB vs Radeon HD 7750
Intro
The Radeon HD 4850 1GB comes with a clock speed of 625 MHz and a GDDR4 memory frequency of 993 MHz. It also features a 256-bit memory bus, and makes use of a 55 nm design. It is comprised of 800(160x5) SPUs, 40 Texture Address Units, and 16 ROPs.Compare those specs to the Radeon HD 7750, which comes with a core clock speed of 800 MHz and a GDDR5 memory speed of 1125 MHz. It also uses a 128-bit memory bus, and makes use of a 28 nm design. It features 512 SPUs, 32 Texture Address Units, and 16 ROPs.
Power Usage and Theoretical Benchmarks
Power Consumption (Max TDP)
| Radeon HD 7750 |
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55 Watts |
| Radeon HD 4850 1GB |
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110 Watts |
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Memory Bandwidth
Theoretically speaking, the Radeon HD 7750 is 13% faster than the Radeon HD 4850 1GB overall, because of its greater bandwidth. (explain)
| Radeon HD 7750 |
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72000 MB/sec |
| Radeon HD 4850 1GB |
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63552 MB/sec |
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Texel Rate
The Radeon HD 7750 should be a bit (about 2%) better at anisotropic filtering than the Radeon HD 4850 1GB. (explain)| Radeon HD 7750 |
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25600 Mtexels/sec |
| Radeon HD 4850 1GB |
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25000 Mtexels/sec |
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Pixel Rate
If using high levels of AA is important to you, then the Radeon HD 7750 is the winner, and very much so. (explain)| Radeon HD 7750 |
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12800 Mpixels/sec |
| Radeon HD 4850 1GB |
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10000 Mpixels/sec |
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Please note that the above 'benchmarks' are all just theoretical - the results were calculated based on the card's specifications, and real-world performance may (and probably will) vary at least a bit.
Price Comparison
Radeon HD 4850 1GBAmazon.com
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Radeon HD 7750Amazon.com
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Please note that the price comparisons are based on search keywords - sometimes it might show cards with very similar names that are not exactly the same as the one chosen in the comparison. We do try to filter out the wrong results as best we can, though.
Specifications
| Model | Radeon HD 4850 1GB | Radeon HD 7750 |
|---|---|---|
| Manufacturer | AMD | AMD |
| Year | Jun 25, 2008 | February 2012 |
| Code Name | RV770 PRO | Cape Verde Pro |
| Memory | 1024 MB | 1024 MB |
| Core Speed | 625 MHz | 800 MHz |
| Memory Speed | 1986 MHz | 4500 MHz |
| Power (Max TDP) | 110 watts | 55 watts |
| Bandwidth | 63552 MB/sec | 72000 MB/sec |
| Texel Rate | 25000 Mtexels/sec | 25600 Mtexels/sec |
| Pixel Rate | 10000 Mpixels/sec | 12800 Mpixels/sec |
| Unified Shaders | 800(160x5) | 512 |
| Texture Mapping Units | 40 | 32 |
| Render Output Units | 16 | 16 |
| Bus Type | GDDR4 | GDDR5 |
| Bus Width | 256-bit | 128-bit |
| Fab Process | 55 nm | 28 nm |
| Transistors | 956 million | 1500 million |
| Bus | PCIe 2.0 x16 | PCIe 3.0 x16 |
| DirectX Version | DirectX 10.1 | DirectX 11.1 |
| OpenGL Version | OpenGL 3.0 | OpenGL 4.2 |
Memory Bandwidth: Bandwidth is the largest amount of information (in units of megabytes per second) that can be transferred over the external memory interface within a second. It is worked out by multiplying the card's interface width by its memory speed. In the case of DDR type RAM, the result should be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The better the card's memory bandwidth, the faster the card will be in general. It especially helps with anti-aliasing, HDR and high resolutions.
Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that can be processed per second. This number is calculated by multiplying the total number of texture units of the card by the core speed of the chip. The higher this number, the better the graphics card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied per second.
Pixel Rate: Pixel rate is the maximum number of pixels that the graphics chip could possibly write to the local memory in one second - measured in millions of pixels per second. The figure is worked out by multiplying the number of Render Output Units by the the core speed of the card. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel fill rate also depends on many other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the potential to reach the maximum fill rate.
Radeon HD 4850 1GBAmazon.com
Check prices at:
|
Radeon HD 7750Amazon.com
Check prices at:
|
Please note that the price comparisons are based on search keywords - sometimes it might show cards with very similar names that are not exactly the same as the one chosen in the comparison. We do try to filter out the wrong results as best we can, though.
|
Comments
One Response to “Radeon HD 4850 1GB vs Radeon HD 7750”Radeon HD 7750, which features a clock frequency of 800 MHz and a GDDR5 memory frequency of 1125 MHz
and GDDR3 memory frequency of 800 MHz !!!!!
Sapphire PCI-Ex Radeon HD7750 2048MB GDDR3 (128bit) (800/1600) (VGA, DVI, HDMI)