GeForce GTX 965M vs Radeon HD 4850 512MB

Intro

Compare those specifications to the Radeon HD 4850 512MB, which comes with GPU clock speed of 625 MHz, and 512 MB of GDDR3 memory running at 993 MHz through a 256-bit bus. It also is comprised of 800(160x5) SPUs, 40 Texture Address Units, and 16 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 965M		60 Watts
Radeon HD 4850 512MB		110 Watts
	Difference: 50 Watts (83%)

Memory Bandwidth

Theoretically, the GeForce GTX 965M should perform a small bit faster than the Radeon HD 4850 512MB in general. (explain)

GeForce GTX 965M		64000 MB/sec
Radeon HD 4850 512MB		63552 MB/sec
	Difference: 448 (1%)

Texel Rate

The GeForce GTX 965M should be a lot (approximately 142%) more effective at AF than the Radeon HD 4850 512MB. (explain)

GeForce GTX 965M		60416 Mtexels/sec
Radeon HD 4850 512MB		25000 Mtexels/sec
	Difference: 35416 (142%)

Pixel Rate

The GeForce GTX 965M will be much (more or less 202%) more effective at full screen anti-aliasing than the Radeon HD 4850 512MB, and also capable of handling higher screen resolutions better. (explain)

GeForce GTX 965M		30208 Mpixels/sec
Radeon HD 4850 512MB		10000 Mpixels/sec
	Difference: 20208 (202%)

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 max amount of information (counted in MB per second) that can be transferred past the external memory interface in a second. It's worked out by multiplying the card's interface width by the speed of its memory. If it uses DDR type memory, the result should be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The better the card's 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 amount of texture units of the card by the core speed of the chip. The higher the texel rate, the better the graphics card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed in a second.

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