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GeForce GT 640 DDR3 vs GeForce GTX 260 216SP 55 nm
Intro
The GeForce GT 640 DDR3 comes with clock speeds of 900 MHz on the GPU, and 1782 MHz on the 2048 MB of DDR3 memory. It features 384 SPUs along with 32 TAUs and 16 ROPs.Compare all of that to the GeForce GTX 260 216SP 55 nm, which makes use of a 55 nm design. nVidia has clocked the core frequency at 576 MHz. The GDDR3 memory is set to run at a frequency of 999 MHz on this particular model. It features 216 SPUs along with 72 Texture Address Units and 28 ROPs.
Power Usage and Theoretical Benchmarks
Power Consumption (Max TDP)
| GeForce GT 640 DDR3 |
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65 Watts |
| GeForce GTX 260 216SP 55 nm |
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171 Watts |
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Memory Bandwidth
Theoretically speaking, the GeForce GTX 260 216SP 55 nm is 96% faster than the GeForce GT 640 DDR3 overall, due to its greater bandwidth. (explain)
| GeForce GTX 260 216SP 55 nm |
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111888 MB/sec |
| GeForce GT 640 DDR3 |
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57024 MB/sec |
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Texel Rate
The GeForce GTX 260 216SP 55 nm is quite a bit (more or less 44%) faster with regards to AF than the GeForce GT 640 DDR3. (explain)| GeForce GTX 260 216SP 55 nm |
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41472 Mtexels/sec |
| GeForce GT 640 DDR3 |
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28800 Mtexels/sec |
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Pixel Rate
The GeForce GTX 260 216SP 55 nm should be just a bit (approximately 12%) better at FSAA than the GeForce GT 640 DDR3, and able to handle higher screen resolutions while still performing well. (explain)| GeForce GTX 260 216SP 55 nm |
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16128 Mpixels/sec |
| GeForce GT 640 DDR3 |
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14400 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 640 DDR3Amazon.com
Check prices at:
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GeForce GTX 260 216SP 55 nmAmazon.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 640 DDR3 | GeForce GTX 260 216SP 55 nm |
|---|---|---|
| Manufacturer | nVidia | nVidia |
| Year | June 2012 | December 22, 2008 |
| Code Name | GK107 | G200b |
| Memory | 2048 MB | 896 MB |
| Core Speed | 900 MHz | 576 MHz |
| Memory Speed | 3564 MHz | 1998 MHz |
| Power (Max TDP) | 65 watts | 171 watts |
| Bandwidth | 57024 MB/sec | 111888 MB/sec |
| Texel Rate | 28800 Mtexels/sec | 41472 Mtexels/sec |
| Pixel Rate | 14400 Mpixels/sec | 16128 Mpixels/sec |
| Unified Shaders | 384 | 216 |
| Texture Mapping Units | 32 | 72 |
| Render Output Units | 16 | 28 |
| Bus Type | DDR3 | GDDR3 |
| Bus Width | 128-bit | 448-bit |
| Fab Process | 28 nm | 55 nm |
| Transistors | 1300 million | 1400 million |
| Bus | PCIe 3.0 x16 | PCIe x16 2.0 |
| DirectX Version | DirectX 11.0 | DirectX 10 |
| OpenGL Version | OpenGL 4.2 | OpenGL 3.1 |
Memory Bandwidth: Memory bandwidth is the largest amount of data (in units of megabytes per second) that can be transported past the external memory interface within a second. It's calculated by multiplying the card's bus width by the speed of its memory. In the case of DDR type memory, it must be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. The higher the card's 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 number of texture map elements (texels) that are processed in one second. This number is calculated by multiplying the total texture units by the core speed of the chip. The higher the texel rate, the better the card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied in one second.
Pixel Rate: Pixel rate is the most pixels that the graphics card could possibly write to its local memory per second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the amount of Render Output Units by the the card's clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel rate also depends on lots of other factors, especially the memory bandwidth of the card - the lower the memory bandwidth is, the lower the potential to reach the maximum fill rate.
GeForce GT 640 DDR3Amazon.com
Check prices at:
|
GeForce GTX 260 216SP 55 nmAmazon.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 “GeForce GT 640 DDR3 vs GeForce GTX 260 216SP 55 nm”Thank you so much for this comparison. I own the 260 & wondered if a new, budget card was worth it. Answer: nope!