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GeForce 8600 GS (OEM) vs GeForce GTX 650

Intro

The GeForce 8600 GS (OEM) comes with core clock speeds of 540 MHz on the GPU, and 400 MHz on the 256 MB of DDR2 memory. It features 32 SPUs along with 16 TAUs and 8 Rasterization Operator Units.

Compare those specifications to the GeForce GTX 650, which uses a 28 nm design. nVidia has clocked the core frequency at 1058 MHz. The GDDR5 RAM works at a speed of 1250 MHz on this card. It features 384 SPUs along with 32 Texture Address Units and 16 Rasterization Operator Units.

(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

The GeForce GTX 650, in theory, should perform much faster than the GeForce 8600 GS (OEM) overall. (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 (approximately 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 is quite a bit (approximately 292%) better at FSAA than the GeForce 8600 GS (OEM), and able to handle higher screen resolutions without slowing down too much. (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

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

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 400 MHz (800 MHz effective) 1250 MHz (5000 MHz effective)
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 largest amount of data (counted in megabytes per second) that can be transferred over the external memory interface within a second. The number is calculated by multiplying the interface width by the speed of its memory. If the card has DDR RAM, the result should be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The better 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 texture map elements (texels) that can be processed per second. This is calculated by multiplying the total texture units of the card by the core speed of the chip. The better the texel rate, the better the card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed in one second.

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics card could possibly record to the local memory in one second - measured in millions of pixels per second. The figure is worked out by multiplying the amount of Raster Operations Pipelines by the the core speed of the card. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel rate also depends on many other factors, especially the memory bandwidth of the card - the lower the memory bandwidth is, the lower the potential to reach the max fill rate.

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