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GeForce GT 340 1GB vs Radeon HD 4890 2GB
Intro
The GeForce GT 340 1GB features core speeds of 550 MHz on the GPU, and 850 MHz on the 1024 MB of GDDR5 memory. It features 96 SPUs as well as 32 Texture Address Units and 8 Rasterization Operator Units.Compare those specs to the Radeon HD 4890 2GB, which features a core clock frequency of 1000 MHz and a GDDR5 memory speed of 975 MHz. It also makes use of a 256-bit memory bus, and uses a 55 nm design. It is made up of 800(160x5) SPUs, 40 TAUs, and 16 ROPs.
Power Usage and Theoretical Benchmarks
Power Consumption (Max TDP)
| GeForce GT 340 1GB |
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69 Watts |
| Radeon HD 4890 2GB |
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190 Watts |
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Memory Bandwidth
The Radeon HD 4890 2GB should theoretically perform much faster than the GeForce GT 340 1GB in general. (explain)
| Radeon HD 4890 2GB |
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124800 MB/sec |
| GeForce GT 340 1GB |
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54400 MB/sec |
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Texel Rate
The Radeon HD 4890 2GB is much (more or less 127%) faster with regards to anisotropic filtering than the GeForce GT 340 1GB. (explain)| Radeon HD 4890 2GB |
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40000 Mtexels/sec |
| GeForce GT 340 1GB |
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17600 Mtexels/sec |
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Pixel Rate
If running with lots of anti-aliasing is important to you, then the Radeon HD 4890 2GB is superior to the GeForce GT 340 1GB, by far. (explain)| Radeon HD 4890 2GB |
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16000 Mpixels/sec |
| GeForce GT 340 1GB |
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4400 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 GT 340 1GBAmazon.com
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Radeon HD 4890 2GBAmazon.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 | GeForce GT 340 1GB | Radeon HD 4890 2GB |
|---|---|---|
| Manufacturer | nVidia | AMD |
| Year | February 2010 | Apr 2, 2009 |
| Code Name | GT215 | RV790 XT |
| Memory | 1024 MB | 2048 MB |
| Core Speed | 550 MHz | 1000 MHz |
| Memory Speed | 3400 MHz | 3900 MHz |
| Power (Max TDP) | 69 watts | 190 watts |
| Bandwidth | 54400 MB/sec | 124800 MB/sec |
| Texel Rate | 17600 Mtexels/sec | 40000 Mtexels/sec |
| Pixel Rate | 4400 Mpixels/sec | 16000 Mpixels/sec |
| Unified Shaders | 96 | 800(160x5) |
| Texture Mapping Units | 32 | 40 |
| Render Output Units | 8 | 16 |
| Bus Type | GDDR5 | GDDR5 |
| Bus Width | 128-bit | 256-bit |
| Fab Process | 40 nm | 55 nm |
| Transistors | 727 million | 959 million |
| Bus | PCIe x16 | PCIe 2.0 x16 |
| DirectX Version | DirectX 10.1 | DirectX 10.1 |
| OpenGL Version | OpenGL 3.3 | OpenGL 3.0 |
Memory Bandwidth: Bandwidth is the max amount of data (measured in MB per second) that can be moved over the external memory interface in one second. It is worked out by multiplying the card's interface width by its memory speed. In the case of DDR type memory, it should be multiplied by 2 once 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 AA, HDR and high resolutions.
Texel Rate: Texel rate is the maximum number of texture map elements (texels) that can be processed per second. This is worked out by multiplying the total number of texture units of the card by the core speed of the chip. The better this number, the better the video card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied in a second.
Pixel Rate: Pixel rate is the maximum amount of pixels the video card could possibly record to the local memory per second - measured in millions of pixels per second. The number is worked out by multiplying the number of ROPs by the the card's clock speed. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel fill rate also depends on quite a few other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the potential to get to the max fill rate.
GeForce GT 340 1GBAmazon.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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