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GeForce 8800 GTS (G80) 640MB vs GeForce GT 340 1GB
Intro
The GeForce 8800 GTS (G80) 640MB uses a 90 nm design. nVidia has clocked the core speed at 513 MHz. The GDDR3 memory runs at a speed of 792 MHz on this specific model. It features 96 SPUs as well as 48 Texture Address Units and 20 Rasterization Operator Units.Compare all of that to the GeForce GT 340 1GB, which makes use of a 40 nm design. nVidia has set the core frequency at 550 MHz. The GDDR5 RAM runs at a speed of 850 MHz on this particular model. It features 96 SPUs along with 32 Texture Address Units and 8 Rasterization Operator Units.
Power Usage and Theoretical Benchmarks
Power Consumption (Max TDP)
| GeForce GT 340 1GB |
|
69 Watts |
| GeForce 8800 GTS (G80) 640MB |
|
143 Watts |
|
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Memory Bandwidth
Theoretically speaking, the GeForce 8800 GTS (G80) 640MB will be 16% quicker than the GeForce GT 340 1GB overall, because of its greater data rate. (explain)
| GeForce 8800 GTS (G80) 640MB |
|
63360 MB/sec |
| GeForce GT 340 1GB |
|
54400 MB/sec |
|
|
Texel Rate
The GeForce 8800 GTS (G80) 640MB is a lot (about 40%) faster with regards to texture filtering than the GeForce GT 340 1GB. (explain)| GeForce 8800 GTS (G80) 640MB |
|
24624 Mtexels/sec |
| GeForce GT 340 1GB |
|
17600 Mtexels/sec |
|
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Pixel Rate
The GeForce 8800 GTS (G80) 640MB will be much (approximately 133%) more effective at full screen anti-aliasing than the GeForce GT 340 1GB, and should be capable of handling higher screen resolutions better. (explain)| GeForce 8800 GTS (G80) 640MB |
|
10260 Mpixels/sec |
| GeForce GT 340 1GB |
|
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
Please note that the price comparisons are based on search keywords, and might not be the exact same card listed on this page. We have no control over the accuracy of their search results.
GeForce 8800 GTS (G80) 640MBAmazon.com
Other US-based stores
Amazon.co.uk
Amazon.de
Amazon.fr
|
GeForce GT 340 1GBAmazon.com
Other US-based stores
Amazon.co.uk
Amazon.de
Amazon.fr
|
Specifications
| Model | GeForce 8800 GTS (G80) 640MB | GeForce GT 340 1GB |
|---|---|---|
| Manufacturer | nVidia | nVidia |
| Year | Nov 2006 (640) | February 2010 |
| Code Name | G80 | GT215 |
| Fab Process | 90 nm | 40 nm |
| Bus | PCIe x16 | PCIe x16 |
| Memory | 640 MB | 1024 MB |
| Core Speed | 513 MHz | 550 MHz |
| Shader Speed | 1188 MHz | 1340 MHz |
| Memory Speed | 792 MHz | 850 MHz |
| Unified Shaders | 96 | 96 |
| Texture Mapping Units | 48 | 32 |
| Render Output Units | 20 | 8 |
| Bus Type | GDDR3 | GDDR5 |
| Bus Width | 320-bit | 128-bit |
| DirectX Version | DirectX 10 | DirectX 10.1 |
| OpenGL Version | OpenGL 3.0 | OpenGL 3.3 |
| Power (Max TDP) | 143 watts | 69 watts |
| Shader Model | 4.0 | 4.1 |
| Bandwidth | 63360 MB/sec | 54400 MB/sec |
| Texel Rate | 24624 Mtexels/sec | 17600 Mtexels/sec |
| Pixel Rate | 10260 Mpixels/sec | 4400 Mpixels/sec |
Memory Bandwidth: Memory bandwidth is the max amount of data (in units of MB per second) that can be transferred across the external memory interface in a second. It's worked out by multiplying the card's bus width by the speed of its memory. If it uses DDR type RAM, it should be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The higher the memory bandwidth, the better the card will be in general. It especially helps with anti-aliasing, HDR and higher screen resolutions.
Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that can be 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 video card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed in a second.
Pixel Rate: Pixel rate is the maximum number of pixels the graphics card can possibly record to the local memory per second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the amount of Raster Operations Pipelines by the the core speed of the card. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel output rate is also dependant on many other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the ability to reach the maximum fill rate.
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