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Radeon HD 6450 (OEM) vs Radeon HD 7870
Intro
The Radeon HD 6450 (OEM) makes use of a 40 nm design. AMD has clocked the core frequency at 625 MHz. The GDDR3 memory runs at a speed of 800 MHz on this specific card. It features 160 SPUs along with 8 Texture Address Units and 4 Rasterization Operator Units.Compare those specs to the Radeon HD 7870, which has GPU clock speed of 1000 MHz, and 2048 MB of GDDR5 RAM running at 1200 MHz through a 256-bit bus. It also features 1280 Stream Processors, 80 TAUs, 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
Theoretically speaking, the Radeon HD 7870 is 1100% faster than the Radeon HD 6450 (OEM) overall, due to its higher data rate. (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 should be quite a bit (about 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
If using high levels of AA is important to you, then the Radeon HD 7870 is the winner, by a large margin. (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 data (measured in MB per second) that can be moved across the external memory interface in a second. It is calculated by multiplying the bus width by the speed of its memory. In the case of DDR type RAM, it must be multiplied by 2 again. If DDR5, multiply by 4 instead. The higher the card's memory bandwidth, the better the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and higher screen resolutions.
Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that can be applied in one second. This number is worked out by multiplying the total texture units of the card by the core clock speed of the chip. The better the texel rate, the better the graphics card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed in a second.
Pixel Rate: Pixel rate is the maximum amount of pixels the video card can possibly write to its local memory in one second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the amount of ROPs by the the core clock speed. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel output rate also depends on quite a few other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the potential to reach the maximum 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 [...]