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GeForce GT 340 1GB vs Radeon HD 4890 1GB
Intro
The GeForce GT 340 1GB comes with a clock frequency of 550 MHz and a GDDR5 memory speed of 850 MHz. It also uses a 128-bit memory bus, and uses a 40 nm design. It is made up of 96 SPUs, 32 Texture Address Units, and 8 Raster Operation Units.Compare those specifications to the Radeon HD 4890 1GB, which makes use of a 55 nm design. AMD has clocked the core frequency at 1000 MHz. The GDDR5 memory works at a frequency of 975 MHz on this specific card. It features 800(160x5) SPUs as well as 40 Texture Address Units 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 1GB |
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190 Watts |
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Memory Bandwidth
Theoretically speaking, the Radeon HD 4890 1GB should be 129% quicker than the GeForce GT 340 1GB overall, due to its greater data rate. (explain)
| Radeon HD 4890 1GB |
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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 1GB will be a lot (about 127%) better at AF than the GeForce GT 340 1GB. (explain)| Radeon HD 4890 1GB |
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40000 Mtexels/sec |
| GeForce GT 340 1GB |
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17600 Mtexels/sec |
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Pixel Rate
The Radeon HD 4890 1GB will be a lot (more or less 264%) better at AA than the GeForce GT 340 1GB, and should be capable of handling higher resolutions more effectively. (explain)| Radeon HD 4890 1GB |
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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
Check prices at:
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Radeon HD 4890 1GBAmazon.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 GT 340 1GB | Radeon HD 4890 1GB |
|---|---|---|
| Manufacturer | nVidia | AMD |
| Year | February 2010 | Apr 2, 2009 |
| Code Name | GT215 | RV790 XT |
| Memory | 1024 MB | 1024 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 largest amount of information (measured in megabytes per second) that can be moved past the external memory interface in a second. It is worked out by multiplying the card's interface width by its memory clock speed. In the case of DDR memory, the result should be multiplied by 2 once 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 AA, HDR and higher screen resolutions.
Texel Rate: Texel rate is the maximum 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 better this number, the better the graphics card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels in one second.
Pixel Rate: Pixel rate is the maximum number of pixels the graphics card could possibly write to the local memory per second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the number of ROPs by the the card's clock speed. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel output rate is also dependant on quite a few other factors, most notably the memory bandwidth of the card - the lower the memory bandwidth is, the lower the ability to get to the maximum fill rate.
GeForce GT 340 1GBAmazon.com
Check prices at:
|
Radeon HD 4890 1GBAmazon.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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