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GeForce GT 640 DDR3 vs Radeon HD 5550
Intro
The GeForce GT 640 DDR3 uses a 28 nm design. nVidia has set the core frequency at 900 MHz. The DDR3 RAM runs at a frequency of 1782 MHz on this card. It features 384 SPUs as well as 32 TAUs and 16 ROPs.Compare that to the Radeon HD 5550, which comes with a clock frequency of 550 MHz and a DDR2 memory speed of 400 MHz. It also uses a 128-bit bus, and uses a 40 nm design. It is made up of 320(64x5) SPUs, 16 TAUs, and 8 Raster Operation Units.
Power Usage and Theoretical Benchmarks
Memory Bandwidth
The GeForce GT 640 DDR3 should in theory be much faster than the Radeon HD 5550 in general. (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 is quite a bit (more or less 227%) better at texture 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
The GeForce GT 640 DDR3 should be much (approximately 227%) better at anti-aliasing than the Radeon HD 5550, and also will be capable of handling higher screen resolutions without losing too much performance. (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
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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 maximum amount of information (in units of megabytes per second) that can be transported over the external memory interface in one second. It is calculated by multiplying the interface width by its memory speed. If the card has DDR memory, it must be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The higher 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 can be applied in one second. This is worked out by multiplying the total number of texture units by the core speed of the chip. The better the texel rate, the better the card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels per second.
Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics chip can possibly write to its local memory in a second - measured in millions of pixels per second. The number is calculated by multiplying the number of Render Output Units by the the card's clock speed. 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 rate also depends on lots of other factors, most notably the memory bandwidth of the card - the lower the bandwidth is, the lower the potential to get to the max 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?