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GeForce GTX 970M vs Radeon HD 4890 2GB
Intro
The GeForce GTX 970M features a core clock frequency of 924 MHz and a GDDR5 memory frequency of 1000 MHz. It also uses a 192-bit memory bus, and uses a 28 nm design. It features 1280 SPUs, 80 Texture Address Units, and 48 ROPs.Compare all that to the Radeon HD 4890 2GB, which has a clock speed of 1000 MHz and a GDDR5 memory speed of 975 MHz. It also makes use of a 256-bit bus, and makes use of a 55 nm design. It is comprised of 800(160x5) SPUs, 40 TAUs, and 16 Raster Operation Units.
Power Usage and Theoretical Benchmarks
Power Consumption (Max TDP)
| GeForce GTX 970M |
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75 Watts |
| Radeon HD 4890 2GB |
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190 Watts |
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Memory Bandwidth
In theory, the Radeon HD 4890 2GB should be 30% quicker than the GeForce GTX 970M in general, due to its higher bandwidth. (explain)
| Radeon HD 4890 2GB |
|
124800 MB/sec |
| GeForce GTX 970M |
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96000 MB/sec |
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Texel Rate
The GeForce GTX 970M will be a lot (about 85%) faster with regards to AF than the Radeon HD 4890 2GB. (explain)| GeForce GTX 970M |
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73920 Mtexels/sec |
| Radeon HD 4890 2GB |
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40000 Mtexels/sec |
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Pixel Rate
If running with high levels of AA is important to you, then the GeForce GTX 970M is a better choice, by far. (explain)| GeForce GTX 970M |
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44352 Mpixels/sec |
| Radeon HD 4890 2GB |
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16000 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
GeForce GTX 970MAmazon.com
Check prices at:
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Radeon HD 4890 2GBAmazon.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 | GeForce GTX 970M | Radeon HD 4890 2GB |
|---|---|---|
| Manufacturer | nVidia | AMD |
| Year | October 7 2014 | Apr 2, 2009 |
| Code Name | GM204 | RV790 XT |
| Memory | 3072 MB | 2048 MB |
| Core Speed | 924 MHz | 1000 MHz |
| Memory Speed | 4000 MHz | 3900 MHz |
| Power (Max TDP) | 75 watts | 190 watts |
| Bandwidth | 96000 MB/sec | 124800 MB/sec |
| Texel Rate | 73920 Mtexels/sec | 40000 Mtexels/sec |
| Pixel Rate | 44352 Mpixels/sec | 16000 Mpixels/sec |
| Unified Shaders | 1280 | 800(160x5) |
| Texture Mapping Units | 80 | 40 |
| Render Output Units | 48 | 16 |
| Bus Type | GDDR5 | GDDR5 |
| Bus Width | 192-bit | 256-bit |
| Fab Process | 28 nm | 55 nm |
| Transistors | (Unknown) million | 959 million |
| Bus | PCIe 3.0 x16 | PCIe 2.0 x16 |
| DirectX Version | DirectX 12 | DirectX 10.1 |
| OpenGL Version | OpenGL 4.5 | OpenGL 3.0 |
Memory Bandwidth: Bandwidth is the largest amount of data (measured in MB per second) that can be moved past the external memory interface in a second. It's worked out by multiplying the card's interface width by its memory speed. If the card has DDR memory, it should be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. The better the memory bandwidth, the faster 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 number of texture map elements (texels) that are processed per second. This figure is worked out by multiplying the total texture units of the card by the core speed of the chip. The higher the texel rate, the better the card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed per second.
Pixel Rate: Pixel rate is the maximum amount of pixels the video card could possibly record to its local memory in one second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the amount of ROPs by the clock speed of the card. 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 is also dependant on lots of other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the ability to get to the max fill rate.
GeForce GTX 970MAmazon.com
Check prices at:
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Radeon HD 4890 2GBAmazon.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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