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GeForce 8600 GT 1GB GDDR3 vs GeForce GT 315

Intro

The GeForce 8600 GT 1GB GDDR3 comes with a core clock speed of 540 MHz and a GDDR3 memory speed of 700 MHz. It also makes use of a 128-bit memory bus, and uses a 80 nm design. It features 32 SPUs, 16 Texture Address Units, and 8 ROPs.

Compare all of that to the GeForce GT 315, which comes with core clock speeds of 625 MHz on the GPU, and 790 MHz on the 512 MB of DDR3 RAM. It features 48 SPUs as well as 16 TAUs and 8 Rasterization Operator Units.

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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

The GeForce GT 315 should theoretically perform a little bit faster than the GeForce 8600 GT 1GB GDDR3 overall. (explain)

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

Texel Rate

The GeForce GT 315 is just a bit (more or less 16%) better at texture filtering 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 will be a little bit (more or less 16%) more effective at full screen anti-aliasing than the GeForce 8600 GT 1GB GDDR3, and able to handle higher 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: Bandwidth is the max amount of information (counted in megabytes per second) that can be transferred over the external memory interface within a second. It is calculated by multiplying the interface width by its memory clock speed. If it uses DDR RAM, it must be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The better the bandwidth is, the faster 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 texture map elements (texels) that can be processed in one second. This number is worked out by multiplying the total amount of texture units by the core speed of the chip. The better this number, the better the video card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed per second.

Pixel Rate: Pixel rate is the most pixels the video card could possibly record to its local memory in one second - measured in millions of pixels per second. The figure is worked out by multiplying the number of ROPs by the the core speed of the card. ROPs (Raster Operations Pipelines - sometimes also referred to as 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 of the card - the lower the bandwidth is, the lower the ability to reach the maximum fill rate.

Display Prices

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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.

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