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Radeon HD 6450 (OEM) vs Radeon HD 7870
Intro
The Radeon HD 6450 (OEM) has a core clock frequency of 625 MHz and a GDDR3 memory speed of 800 MHz. It also features a 64-bit bus, and makes use of a 40 nm design. It is comprised of 160 SPUs, 8 Texture Address Units, and 4 ROPs.Compare all that to the Radeon HD 7870, which comes with a clock frequency of 1000 MHz and a GDDR5 memory frequency of 1200 MHz. It also features a 256-bit memory bus, and uses a 28 nm design. It is made up of 1280 SPUs, 80 Texture Address Units, and 32 Raster Operation Units.
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
In theory, the Radeon HD 7870 should perform quite a bit faster than the Radeon HD 6450 (OEM) in general. (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 will be quite a bit (more or less 1500%) more effective 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 a high resolution is important to you, then the Radeon HD 7870 is a better choice, by far. (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: Memory bandwidth is the max amount of information (counted in MB per second) that can be transported across the external memory interface in one second. It's worked out by multiplying the card's bus width by its memory speed. If the card has DDR type memory, the result should be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The better the memory bandwidth, the better the card will be in general. It especially helps with AA, HDR and high resolutions.
Texel Rate: Texel rate is the maximum texture map elements (texels) that can be processed per second. This figure is calculated by multiplying the total texture units of the card by the core clock speed of the chip. The higher the texel rate, the better the video 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 amount of pixels that the graphics card could possibly write to its local memory in a second - measured in millions of pixels per second. The number is worked out by multiplying the amount of colour ROPs by the the card's clock speed. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel fill rate is also dependant on many other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the potential to get to 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.
|
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 [...]