GeForce 830M vs Radeon R7 M265

Intro

Compare those specifications to the Radeon R7 M265, which features GPU clock speed of 725 MHz, and 2048 MB of DDR3 RAM set to run at 1000 MHz through a 128-bit bus. It also is comprised of 384 SPUs, 24 TAUs, and 8 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Memory Bandwidth

Performance-wise, the Radeon R7 M265 should in theory be quite a bit better than the GeForce 830M overall. (explain)

Radeon R7 M265		32000 MB/sec
GeForce 830M		14400 MB/sec
	Difference: 17600 (122%)

Texel Rate

The Radeon R7 M265 should be a little bit (more or less 6%) faster with regards to AF than the GeForce 830M. (explain)

Radeon R7 M265		17400 Mtexels/sec
GeForce 830M		16464 Mtexels/sec
	Difference: 936 (6%)

Pixel Rate

The GeForce 830M will be quite a bit (more or less 42%) more effective at full screen anti-aliasing than the Radeon R7 M265, and also will be able to handle higher screen resolutions without losing too much performance. (explain)

GeForce 830M		8232 Mpixels/sec
Radeon R7 M265		5800 Mpixels/sec
	Difference: 2432 (42%)

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 data (counted in MB per second) that can be transferred past the external memory interface in a second. The number is calculated by multiplying the bus width by its memory speed. In the case of DDR type RAM, it must be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The higher the card's memory bandwidth, the faster the card will be in general. It especially helps with AA, HDR and higher screen resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that can be processed in one second. This is calculated by multiplying the total number of texture units by the core clock speed of the chip. The higher this number, the better the graphics card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels in a second.

Pixel Rate: Pixel rate is the maximum amount of pixels the video card could possibly record to its local memory in a second - measured in millions of pixels per second. The figure is worked out by multiplying the number of ROPs by the the core speed of the card. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel 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 potential to reach the max fill rate.