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GeForce GT 640 DDR3 vs Radeon HD 5550
Intro
The GeForce GT 640 DDR3 comes with a core clock frequency of 900 MHz and a DDR3 memory frequency of 1782 MHz. It also makes use of a 128-bit bus, and uses a 28 nm design. It is made up of 384 SPUs, 32 Texture Address Units, and 16 ROPs.Compare all of that to the Radeon HD 5550, which comes with core speeds of 550 MHz on the GPU, and 400 MHz on the 512 MB of DDR2 memory. It features 320(64x5) SPUs along with 16 TAUs and 8 ROPs.
Power Usage and Theoretical Benchmarks
Memory Bandwidth
Theoretically speaking, the GeForce GT 640 DDR3 should be much faster than the Radeon HD 5550 overall. (explain)
| GeForce GT 640 DDR3 |
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57024 MB/sec |
| Radeon HD 5550 |
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12800 MB/sec |
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Texel Rate
The GeForce GT 640 DDR3 will be a lot (approximately 227%) better at anisotropic filtering than the Radeon HD 5550. (explain)| GeForce GT 640 DDR3 |
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28800 Mtexels/sec |
| Radeon HD 5550 |
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8800 Mtexels/sec |
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Pixel Rate
If using a high resolution is important to you, then the GeForce GT 640 DDR3 is superior to the Radeon HD 5550, by far. (explain)| GeForce GT 640 DDR3 |
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14400 Mpixels/sec |
| Radeon HD 5550 |
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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 640 DDR3Amazon.com
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Radeon HD 5550Amazon.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 | Radeon HD 5550 |
|---|---|---|
| Manufacturer | nVidia | AMD |
| Year | June 2012 | February 9, 2010 |
| Code Name | GK107 | Redwood LE |
| Memory | 2048 MB | 512 MB |
| Core Speed | 900 MHz | 550 MHz |
| Memory Speed | 3564 MHz | 800 MHz |
| Power (Max TDP) | 65 watts | (Unknown) watts |
| Bandwidth | 57024 MB/sec | 12800 MB/sec |
| Texel Rate | 28800 Mtexels/sec | 8800 Mtexels/sec |
| Pixel Rate | 14400 Mpixels/sec | 4400 Mpixels/sec |
| Unified Shaders | 384 | 320(64x5) |
| Texture Mapping Units | 32 | 16 |
| Render Output Units | 16 | 8 |
| Bus Type | DDR3 | DDR2 |
| Bus Width | 128-bit | 128-bit |
| Fab Process | 28 nm | 40 nm |
| Transistors | 1300 million | 627 million |
| Bus | PCIe 3.0 x16 | PCIe 2.1 x16 |
| DirectX Version | DirectX 11.0 | DirectX 11 |
| OpenGL Version | OpenGL 4.2 | OpenGL 3.2 |
Memory Bandwidth: Memory bandwidth is the largest amount of information (in units of megabytes per second) that can be transported across the external memory interface in a second. The number is calculated by multiplying the bus width by the speed of its memory. If the card has DDR RAM, it should be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The higher the memory bandwidth, the better the card will be in general. It especially helps with AA, High Dynamic Range and higher screen resolutions.
Texel Rate: Texel rate is the maximum number of texture map elements (texels) that can be applied in one second. This number is calculated by multiplying the total texture units of the card by the core clock speed of the chip. The better the texel rate, 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 that the graphics card can possibly write to its local memory in a second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the amount of Render Output Units by the clock speed of the card. ROPs (Raster Operations Pipelines - aka 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 memory bandwidth is, the lower the potential to get to the maximum fill rate.
GeForce GT 640 DDR3Amazon.com
Check prices at:
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Radeon HD 5550Amazon.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 Radeon HD 5550”It's worth noting that the 5550 comes in DDR2 and DDR3 (1GB) formats, these numbers just reflect the DDR2 performance, any chance of a DDR3 option too?