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GeForce 8600 GS (OEM) vs GeForce GTX 650

Intro

The GeForce 8600 GS (OEM) comes with a GPU core clock speed of 540 MHz, and the 256 MB of DDR2 memory runs at 400 MHz through a 128-bit bus. It also features 32 SPUs, 16 Texture Address Units, and 8 Raster Operation Units.

Compare all that to the GeForce GTX 650, which makes use of a 28 nm design. nVidia has clocked the core speed at 1058 MHz. The GDDR5 memory works at a frequency of 1250 MHz on this card. It features 384 SPUs along with 32 Texture Address Units and 16 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce 8600 GS (OEM) 47 Watts
GeForce GTX 650 64 Watts
Difference: 17 Watts (36%)

Memory Bandwidth

In theory, the GeForce GTX 650 is 525% faster than the GeForce 8600 GS (OEM) overall, because of its higher bandwidth. (explain)

GeForce GTX 650 80000 MB/sec
GeForce 8600 GS (OEM) 12800 MB/sec
Difference: 67200 (525%)

Texel Rate

The GeForce GTX 650 should be a lot (about 292%) faster with regards to texture filtering than the GeForce 8600 GS (OEM). (explain)

GeForce GTX 650 33856 Mtexels/sec
GeForce 8600 GS (OEM) 8640 Mtexels/sec
Difference: 25216 (292%)

Pixel Rate

The GeForce GTX 650 will be a lot (about 292%) more effective at anti-aliasing than the GeForce 8600 GS (OEM), and also should be able to handle higher resolutions better. (explain)

GeForce GTX 650 16928 Mpixels/sec
GeForce 8600 GS (OEM) 4320 Mpixels/sec
Difference: 12608 (292%)

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 GS (OEM)

Amazon.com

GeForce GTX 650

Amazon.com

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 GS (OEM) GeForce GTX 650
Manufacturer nVidia nVidia
Year April 2007 September 2012
Code Name G84 GK107
Memory 256 MB 1024 MB
Core Speed 540 MHz 1058 MHz
Memory Speed 800 MHz 5000 MHz
Power (Max TDP) 47 watts 64 watts
Bandwidth 12800 MB/sec 80000 MB/sec
Texel Rate 8640 Mtexels/sec 33856 Mtexels/sec
Pixel Rate 4320 Mpixels/sec 16928 Mpixels/sec
Unified Shaders 32 384
Texture Mapping Units 16 32
Render Output Units 8 16
Bus Type DDR2 GDDR5
Bus Width 128-bit 128-bit
Fab Process 80 nm 28 nm
Transistors 289 million 1300 million
Bus PCIe x16 PCIe 3.0 x16
DirectX Version DirectX 10 DirectX 11.0
OpenGL Version OpenGL 3.0 OpenGL 4.3

Memory Bandwidth: Memory bandwidth is the maximum amount of information (in units of MB per second) that can be moved past the external memory interface in a second. The number is calculated by multiplying the card's interface width by the speed of its memory. In the case of DDR RAM, it must be multiplied by 2 again. If DDR5, multiply by 4 instead. The better the bandwidth is, the faster the card will be in general. It especially helps with anti-aliasing, HDR and high resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that can be processed per 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 graphics card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied in one second.

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics card can possibly record to the local memory per 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 outputting the pixels (image) to the screen. The actual pixel output rate is also dependant on many other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the ability to reach the maximum fill rate.

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