GeForce GTX 870M vs Radeon R5 M330

Intro

Compare those specs to the Radeon R5 M330, which comes with a clock speed of 1030 MHz and a DDR3 memory speed of 900 MHz. It also features a 64-bit bus, and uses a 28 nm design. It is made up of 320 SPUs, 20 TAUs, and 8 Raster Operation Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Memory Bandwidth

Performance-wise, the GeForce GTX 870M should in theory be much better than the Radeon R5 M330 in general. (explain)

GeForce GTX 870M		96000 MB/sec
Radeon R5 M330		14400 MB/sec
	Difference: 81600 (567%)

Texel Rate

The GeForce GTX 870M will be quite a bit (about 412%) faster with regards to anisotropic filtering than the Radeon R5 M330. (explain)

GeForce GTX 870M		105392 Mtexels/sec
Radeon R5 M330		20600 Mtexels/sec
	Difference: 84792 (412%)

Pixel Rate

The GeForce GTX 870M will be a lot (more or less 174%) better at AA than the Radeon R5 M330, and able to handle higher screen resolutions more effectively. (explain)

GeForce GTX 870M		22584 Mpixels/sec
Radeon R5 M330		8240 Mpixels/sec
	Difference: 14344 (174%)

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 transported across the external memory interface in one second. It is worked out by multiplying the card's bus width by the speed of its memory. If the card has DDR type RAM, it must be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The higher the bandwidth is, the faster the card will be in general. It especially helps with anti-aliasing, HDR and high resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that are applied per second. This is worked out by multiplying the total amount of texture units by the core speed of the chip. The higher the texel rate, the better the video 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 most pixels that the graphics chip could possibly write to its local memory in one second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the amount of Render Output Units by the the core clock speed. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel output rate also depends on many other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the ability to reach the maximum fill rate.