GeForce 830M vs Radeon R9 M270X

Intro

Compare those specs to the Radeon R9 M270X, which comes with core speeds of 725 MHz on the GPU, and 1125 MHz on the 2048 MB of GDDR5 RAM. It features 640 SPUs as well as 40 TAUs and 16 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Memory Bandwidth

Performance-wise, the Radeon R9 M270X should in theory be a lot superior to the GeForce 830M overall. (explain)

Radeon R9 M270X		72000 MB/sec
GeForce 830M		14400 MB/sec
	Difference: 57600 (400%)

Texel Rate

The Radeon R9 M270X will be quite a bit (more or less 76%) faster with regards to AF than the GeForce 830M. (explain)

Radeon R9 M270X		29000 Mtexels/sec
GeForce 830M		16464 Mtexels/sec
	Difference: 12536 (76%)

Pixel Rate

If running with high levels of AA is important to you, then the Radeon R9 M270X is superior to the GeForce 830M, by a large margin. (explain)

Radeon R9 M270X		11600 Mpixels/sec
GeForce 830M		8232 Mpixels/sec
	Difference: 3368 (41%)

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 (counted in MB per second) that can be transported 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. In the case of DDR RAM, it should be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The better the card's memory bandwidth, the better the card will be in general. It especially helps with AA, HDR and higher screen resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that can be applied in one second. This is calculated by multiplying the total texture units of the card by the core clock speed of the chip. The higher this number, 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 the video card can possibly record to the local memory in one second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the number of ROPs by the clock speed of the card. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel output rate is also dependant on quite a few other factors, most notably the memory bandwidth of the card - the lower the memory bandwidth is, the lower the ability to reach the maximum fill rate.