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GeForce 8500 GT vs GeForce GTX 850M

Intro

The GeForce 8500 GT has core speeds of 450 MHz on the GPU, and 400 MHz on the 512 MB of DDR2 memory. It features 16 SPUs along with 8 Texture Address Units and 4 Rasterization Operator Units.

Compare all that to the GeForce GTX 850M, which comes with a clock speed of 876 MHz and a DDR3 memory speed of 1000 MHz. It also features a 128-bit bus, and uses a 28 nm design. It is comprised of 640 SPUs, 40 TAUs, and 16 Raster Operation Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 850M 40 Watts
GeForce 8500 GT 45 Watts
Difference: 5 Watts (13%)

Memory Bandwidth

Theoretically speaking, the GeForce GTX 850M is 150% quicker than the GeForce 8500 GT overall, because of its greater bandwidth. (explain)

GeForce GTX 850M 32000 MB/sec
GeForce 8500 GT 12800 MB/sec
Difference: 19200 (150%)

Texel Rate

The GeForce GTX 850M will be a lot (more or less 873%) more effective at AF than the GeForce 8500 GT. (explain)

GeForce GTX 850M 35040 Mtexels/sec
GeForce 8500 GT 3600 Mtexels/sec
Difference: 31440 (873%)

Pixel Rate

The GeForce GTX 850M will be a lot (more or less 679%) faster with regards to full screen anti-aliasing than the GeForce 8500 GT, and will be capable of handling higher resolutions while still performing well. (explain)

GeForce GTX 850M 14016 Mpixels/sec
GeForce 8500 GT 1800 Mpixels/sec
Difference: 12216 (679%)

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 8500 GT

Amazon.com

Check prices at:

GeForce GTX 850M

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 8500 GT GeForce GTX 850M
Manufacturer nVidia nVidia
Year April 2007 March 12 2014
Code Name G86 GM107
Memory 512 MB 2048 MB
Core Speed 450 MHz 876 MHz
Memory Speed 800 MHz 2000 MHz
Power (Max TDP) 45 watts 40 watts
Bandwidth 12800 MB/sec 32000 MB/sec
Texel Rate 3600 Mtexels/sec 35040 Mtexels/sec
Pixel Rate 1800 Mpixels/sec 14016 Mpixels/sec
Unified Shaders 16 640
Texture Mapping Units 8 40
Render Output Units 4 16
Bus Type DDR2 DDR3
Bus Width 128-bit 128-bit
Fab Process 80 nm 28 nm
Transistors 210 million (Unknown) million
Bus PCIe x16, PCI, PCIe x16 2.0 PCIe 3.0 x16
DirectX Version DirectX 10 DirectX 12
OpenGL Version OpenGL 3.0 OpenGL 4.5

Memory Bandwidth: Memory bandwidth is the max amount of data (measured in MB per second) that can be moved past the external memory interface in a second. It's worked out by multiplying the bus width by its memory speed. In the case of DDR type memory, it must be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The higher the bandwidth is, the better 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 in one second. This is worked out by multiplying the total texture units by the core clock speed of the chip. The higher the texel rate, the better the video card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied per second.

Pixel Rate: Pixel rate is the most pixels that the graphics chip could possibly record to the local memory in one second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the amount of Raster Operations Pipelines by the the card's clock speed. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel output rate also depends on quite a few other factors, most notably the memory bandwidth of the card - the lower the memory bandwidth is, the lower the potential to get to the maximum fill rate.

Display Prices

Hide Prices

GeForce 8500 GT

Amazon.com

Check prices at:

GeForce GTX 850M

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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