GeForce 8500 GT vs GeForce GTX 965M

Intro

Compare all that to the GeForce GTX 965M, which features GPU clock speed of 944 MHz, and 2048 MB of GDDR5 RAM set to run at 1000 MHz through a 128-bit bus. It also is made up of 1024 SPUs, 64 Texture Address Units, and 32 Raster Operation Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce 8500 GT		45 Watts
GeForce GTX 965M		60 Watts
	Difference: 15 Watts (33%)

Memory Bandwidth

Theoretically speaking, the GeForce GTX 965M will be 400% quicker than the GeForce 8500 GT in general, due to its greater data rate. (explain)

GeForce GTX 965M		64000 MB/sec
GeForce 8500 GT		12800 MB/sec
	Difference: 51200 (400%)

Texel Rate

The GeForce GTX 965M will be much (approximately 1578%) faster with regards to AF than the GeForce 8500 GT. (explain)

GeForce GTX 965M		60416 Mtexels/sec
GeForce 8500 GT		3600 Mtexels/sec
	Difference: 56816 (1578%)

Pixel Rate

The GeForce GTX 965M is quite a bit (about 1578%) more effective at FSAA than the GeForce 8500 GT, and also should be capable of handling higher resolutions better. (explain)

GeForce GTX 965M		30208 Mpixels/sec
GeForce 8500 GT		1800 Mpixels/sec
	Difference: 28408 (1578%)

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

Specifications

Memory Bandwidth: Memory bandwidth is the largest amount of data (in units of MB per second) that can be transferred over the external memory interface within a second. It's calculated by multiplying the interface width by its memory clock speed. In the case of DDR memory, the result should be multiplied by 2 once again. If DDR5, multiply by 4 instead. The better the memory bandwidth, the faster the card will be in general. It especially helps with AA, High Dynamic Range and high resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that can be processed in one second. This is worked out by multiplying the total amount of texture units by the core speed of the chip. The better the texel rate, the better the card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels per second.

Pixel Rate: Pixel rate is the most pixels the graphics card could possibly write to the local memory per second - measured in millions of pixels per second. The number is calculated by multiplying the amount of Render Output Units 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 lots of other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the potential to reach the maximum fill rate.