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GeForce 8600 GT 1GB GDDR3 vs GeForce GT 315

Intro

The GeForce 8600 GT 1GB GDDR3 features a GPU clock speed of 540 MHz, and the 1024 MB of GDDR3 memory runs at 700 MHz through a 128-bit bus. It also features 32 Stream Processors, 16 TAUs, and 8 Raster Operation Units.

Compare that to the GeForce GT 315, which has a clock frequency of 625 MHz and a DDR3 memory frequency of 790 MHz. It also makes use of a 128-bit bus, and makes use of a 40 nm design. It features 48 SPUs, 16 TAUs, and 8 ROPs.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce 8600 GT 1GB GDDR3 47 Watts
GeForce GT 315 52 Watts
Difference: 5 Watts (11%)

Memory Bandwidth

Theoretically, the GeForce GT 315 should be a small bit faster than the GeForce 8600 GT 1GB GDDR3 in general. (explain)

GeForce GT 315 25280 MB/sec
GeForce 8600 GT 1GB GDDR3 22400 MB/sec
Difference: 2880 (13%)

Texel Rate

The GeForce GT 315 should be a small bit (approximately 16%) faster with regards to AF than the GeForce 8600 GT 1GB GDDR3. (explain)

GeForce GT 315 10000 Mtexels/sec
GeForce 8600 GT 1GB GDDR3 8640 Mtexels/sec
Difference: 1360 (16%)

Pixel Rate

The GeForce GT 315 is a little bit (about 16%) faster with regards to FSAA than the GeForce 8600 GT 1GB GDDR3, and also capable of handling higher screen resolutions better. (explain)

GeForce GT 315 5000 Mpixels/sec
GeForce 8600 GT 1GB GDDR3 4320 Mpixels/sec
Difference: 680 (16%)

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 8600 GT 1GB GDDR3

Amazon.com

Check prices at:

GeForce GT 315

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.

Specifications

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Model GeForce 8600 GT 1GB GDDR3 GeForce GT 315
Manufacturer nVidia nVidia
Year April 2007 November 2009
Code Name G84 GT216
Memory 1024 MB 512 MB
Core Speed 540 MHz 625 MHz
Memory Speed 1400 MHz 1580 MHz
Power (Max TDP) 47 watts 52 watts
Bandwidth 22400 MB/sec 25280 MB/sec
Texel Rate 8640 Mtexels/sec 10000 Mtexels/sec
Pixel Rate 4320 Mpixels/sec 5000 Mpixels/sec
Unified Shaders 32 48
Texture Mapping Units 16 16
Render Output Units 8 8
Bus Type GDDR3 DDR3
Bus Width 128-bit 128-bit
Fab Process 80 nm 40 nm
Transistors 289 million 486 million
Bus PCIe x16 PCIe 2.0
DirectX Version DirectX 10 DirectX 10.1
OpenGL Version OpenGL 3.0 OpenGL 3.2

Memory Bandwidth: Memory bandwidth is the largest amount of information (in units of MB per second) that can be transferred across the external memory interface in one second. The number is worked out by multiplying the card's bus width by its memory clock speed. If it uses DDR type memory, it should be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. 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 amount of texture map elements (texels) that can be processed per second. This is worked out by multiplying the total amount of texture units of the card 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 processed per second.

Pixel Rate: Pixel rate is the maximum amount of pixels the video card 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 Raster Operations Pipelines by the the core speed of the card. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel rate is also dependant on quite a few other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the potential to reach the maximum fill rate.

Display Prices

Hide Prices

GeForce 8600 GT 1GB GDDR3

Amazon.com

Check prices at:

GeForce GT 315

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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