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GeForce 8800 GTS (G80) 640MB vs GeForce GT 340

Intro

The GeForce 8800 GTS (G80) 640MB uses a 90 nm design. nVidia has clocked the core frequency at 513 MHz. The GDDR3 memory runs at a speed of 792 MHz on this card. It features 96 SPUs as well as 48 TAUs and 20 Rasterization Operator Units.

Compare all of that to the GeForce GT 340, which features a clock speed of 550 MHz and a GDDR5 memory speed of 850 MHz. It also makes use of a 128-bit bus, and uses a 40 nm design. It features 96 SPUs, 32 TAUs, and 8 Raster Operation Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GT 340 69 Watts
GeForce 8800 GTS (G80) 640MB 143 Watts
Difference: 74 Watts (107%)

Memory Bandwidth

Theoretically speaking, the GeForce 8800 GTS (G80) 640MB is 16% faster than the GeForce GT 340 in general, because of its greater bandwidth. (explain)

GeForce 8800 GTS (G80) 640MB 63360 MB/sec
GeForce GT 340 54400 MB/sec
Difference: 8960 (16%)

Texel Rate

The GeForce 8800 GTS (G80) 640MB is a lot (approximately 40%) better at AF than the GeForce GT 340. (explain)

GeForce 8800 GTS (G80) 640MB 24624 Mtexels/sec
GeForce GT 340 17600 Mtexels/sec
Difference: 7024 (40%)

Pixel Rate

The GeForce 8800 GTS (G80) 640MB is much (approximately 133%) faster with regards to anti-aliasing than the GeForce GT 340, and also able to handle higher screen resolutions without slowing down too much. (explain)

GeForce 8800 GTS (G80) 640MB 10260 Mpixels/sec
GeForce GT 340 4400 Mpixels/sec
Difference: 5860 (133%)

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

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GeForce 8800 GTS (G80) 640MB

Amazon.com

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GeForce GT 340

Amazon.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

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Model GeForce 8800 GTS (G80) 640MB GeForce GT 340
Manufacturer nVidia nVidia
Year Nov 2006 (640) February 2010
Code Name G80 GT215
Memory 640 MB 512 MB
Core Speed 513 MHz 550 MHz
Memory Speed 1584 MHz 3400 MHz
Power (Max TDP) 143 watts 69 watts
Bandwidth 63360 MB/sec 54400 MB/sec
Texel Rate 24624 Mtexels/sec 17600 Mtexels/sec
Pixel Rate 10260 Mpixels/sec 4400 Mpixels/sec
Unified Shaders 96 96
Texture Mapping Units 48 32
Render Output Units 20 8
Bus Type GDDR3 GDDR5
Bus Width 320-bit 128-bit
Fab Process 90 nm 40 nm
Transistors 681 million 727 million
Bus PCIe x16 PCIe x16
DirectX Version DirectX 10 DirectX 10.1
OpenGL Version OpenGL 3.0 OpenGL 3.3

Memory Bandwidth: Memory bandwidth is the maximum amount of information (in units of megabytes per second) that can be moved past the external memory interface in one second. It's worked out by multiplying the interface width by the speed of its memory. In the case of DDR RAM, it should be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The better the card's 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 amount of texture map elements (texels) that are processed in one second. This is calculated by multiplying the total amount of texture units by the core clock 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 applied in a second.

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics chip could possibly write to the local memory in a second - measured in millions of pixels per second. The figure is calculated by multiplying the number of ROPs by the the card's clock speed. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for filling the screen with pixels (the image). 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 ability to get to the maximum fill rate.

Display Prices

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GeForce 8800 GTS (G80) 640MB

Amazon.com

Check prices at:

GeForce GT 340

Amazon.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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