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Radeon HD 6450 (OEM) vs Radeon HD 7870
Intro
The Radeon HD 6450 (OEM) features a clock speed of 625 MHz and a GDDR3 memory frequency of 800 MHz. It also uses a 64-bit bus, and makes use of a 40 nm design. It is made up of 160 SPUs, 8 TAUs, and 4 ROPs.Compare all that to the Radeon HD 7870, which has core speeds of 1000 MHz on the GPU, and 1200 MHz on the 2048 MB of GDDR5 memory. It features 1280 SPUs along with 80 Texture Address Units and 32 ROPs.
Benchmarks
These are real-world performance benchmarks that were submitted by Hardware Compare users. The scores seen here are the average of all benchmarks submitted for each respective test and hardware.
3DMark Fire Strike Graphics Score
| Radeon HD 7870 |
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6230 points |
| Radeon HD 6450 (OEM) |
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340 points |
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Power Usage and Theoretical Benchmarks
Power Consumption (Max TDP)
| Radeon HD 6450 (OEM) |
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31 Watts |
| Radeon HD 7870 |
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175 Watts |
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Memory Bandwidth
As far as performance goes, the Radeon HD 7870 should in theory be a lot better than the Radeon HD 6450 (OEM) overall. (explain)
| Radeon HD 7870 |
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153600 MB/sec |
| Radeon HD 6450 (OEM) |
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12800 MB/sec |
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Texel Rate
The Radeon HD 7870 is much (more or less 1500%) better at anisotropic filtering than the Radeon HD 6450 (OEM). (explain)| Radeon HD 7870 |
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80000 Mtexels/sec |
| Radeon HD 6450 (OEM) |
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5000 Mtexels/sec |
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Pixel Rate
The Radeon HD 7870 will be quite a bit (approximately 1180%) more effective at full screen anti-aliasing than the Radeon HD 6450 (OEM), and also will be capable of handling higher screen resolutions without slowing down too much. (explain)| Radeon HD 7870 |
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32000 Mpixels/sec |
| Radeon HD 6450 (OEM) |
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2500 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 6450 (OEM)Amazon.com
Check prices at:
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Radeon HD 7870Amazon.com
Check prices at:
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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 6450 (OEM) | Radeon HD 7870 |
|---|---|---|
| Manufacturer | AMD | AMD |
| Year | February 2011 | March 2012 |
| Code Name | Caicos | Pitcairn XT |
| Memory | 512 MB | 2048 MB |
| Core Speed | 625 MHz | 1000 MHz |
| Memory Speed | 1600 MHz | 4800 MHz |
| Power (Max TDP) | 31 watts | 175 watts |
| Bandwidth | 12800 MB/sec | 153600 MB/sec |
| Texel Rate | 5000 Mtexels/sec | 80000 Mtexels/sec |
| Pixel Rate | 2500 Mpixels/sec | 32000 Mpixels/sec |
| Unified Shaders | 160 | 1280 |
| Texture Mapping Units | 8 | 80 |
| Render Output Units | 4 | 32 |
| Bus Type | GDDR3 | GDDR5 |
| Bus Width | 64-bit | 256-bit |
| Fab Process | 40 nm | 28 nm |
| Transistors | 370 million | 2800 million |
| Bus | PCIe 2.1 x16 | PCIe 3.0 x16 |
| DirectX Version | DirectX 11 | DirectX 11.1 |
| OpenGL Version | OpenGL 4.1 | OpenGL 4.2 |
Memory Bandwidth: Bandwidth is the max amount of information (measured in MB per second) that can be transferred past the external memory interface in one second. It is calculated 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 it uses DDR5, multiply by 4 instead. The better the card's memory bandwidth, the faster the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and high resolutions.
Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that can be applied per second. This number is calculated by multiplying the total texture units of the card by the core speed of the chip. The higher this number, the better the graphics card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed per second.
Pixel Rate: Pixel rate is the most pixels that the graphics card can possibly write to its local memory in a second - measured in millions of pixels per second. The figure is calculated by multiplying the number of Render Output Units by the the card's clock speed. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel output rate also depends on many other factors, most notably the memory bandwidth of the card - the lower the bandwidth is, the lower the potential to reach the max fill rate.
Radeon HD 6450 (OEM)Amazon.com
Check prices at:
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Radeon HD 7870Amazon.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.
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Comments
One Response to “Radeon HD 6450 (OEM) vs Radeon HD 7870”[...] 83 The AMD Radeon HD 7870 should be within your budget and is much better than your current card. In the latest AMD Radeon cards they achieved a much higher efficiency for the cost. Check out the comparison here: Radeon HD 6450 (OEM) vs Radeon HD 7870 – Performance Comparison Benchmarks @ Hardware Compare [...]