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GeForce 8600 GS (OEM) vs GeForce GTX 650

Intro

The GeForce 8600 GS (OEM) uses a 80 nm design. nVidia has clocked the core speed at 540 MHz. The DDR2 RAM runs at a frequency of 400 MHz on this card. It features 32 SPUs as well as 16 Texture Address Units and 8 ROPs.

Compare all of that to the GeForce GTX 650, which features a core clock speed of 1058 MHz and a GDDR5 memory frequency of 1250 MHz. It also uses a 128-bit bus, and makes use of a 28 nm design. It features 384 SPUs, 32 Texture Address Units, and 16 Raster Operation Units.

Display Graphs

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(No game benchmarks for this combination yet.)

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 should be 525% faster than the GeForce 8600 GS (OEM) in general, due to its higher data rate. (explain)

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

Texel Rate

The GeForce GTX 650 will be much (more or less 292%) better at AF 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 much (more or less 292%) more effective at AA than the GeForce 8600 GS (OEM), and will be capable of handling higher resolutions without losing too much performance. (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

Display Prices

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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
Fab Process 80 nm 28 nm
Bus PCIe x16 PCIe 3.0 x16
Memory 256 MB 2048 MB
Core Speed 540 MHz 1058 MHz
Shader Speed 1180 MHz 1058 MHz
Memory Speed 800 MHz 5000 MHz
Unified Shaders 32 384
Texture Mapping Units 16 32
Render Output Units 8 16
Bus Type DDR2 GDDR5
Bus Width 128-bit 128-bit
DirectX Version DirectX 10 DirectX 11.0
OpenGL Version OpenGL 3.0 OpenGL 4.3
Power (Max TDP) 47 watts 64 watts
Shader Model 4.0 5.0
Bandwidth 12800 MB/sec 80000 MB/sec
Texel Rate 8640 Mtexels/sec 33856 Mtexels/sec
Pixel Rate 4320 Mpixels/sec 16928 Mpixels/sec

Memory Bandwidth: Bandwidth is the max amount of data (in units of MB per second) that can be transported across the external memory interface within a second. It is worked out by multiplying the card's bus width by the speed of its memory. If it uses DDR type RAM, the result should be multiplied by 2 again. If DDR5, multiply by 4 instead. The higher the bandwidth is, the faster 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 applied per second. This is worked out by multiplying the total amount of texture units by the core speed of the chip. The higher this number, the better the card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels in a second.

Pixel Rate: Pixel rate is the most pixels that the graphics chip could possibly write to its 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 core clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel output rate is also dependant on many other factors, especially the memory bandwidth of the card - the lower the bandwidth is, the lower the potential to get to the max fill rate.

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