GeForce 830M vs Radeon R9 M265X

Intro

Compare that to the Radeon R9 M265X, which features a clock speed of 575 MHz and a GDDR5 memory frequency of 1125 MHz. It also makes use of a 128-bit memory bus, and uses a 28 nm design. It is comprised of 640 SPUs, 40 Texture Address Units, and 16 ROPs.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Memory Bandwidth

In theory, the Radeon R9 M265X should perform much faster than the GeForce 830M overall. (explain)

Radeon R9 M265X		72000 MB/sec
GeForce 830M		14400 MB/sec
	Difference: 57600 (400%)

Texel Rate

The Radeon R9 M265X is a lot (about 40%) better at texture filtering than the GeForce 830M. (explain)

Radeon R9 M265X		23000 Mtexels/sec
GeForce 830M		16464 Mtexels/sec
	Difference: 6536 (40%)

Pixel Rate

If using a high resolution is important to you, then the Radeon R9 M265X is the winner, though not by far. (explain)

Radeon R9 M265X		9200 Mpixels/sec
GeForce 830M		8232 Mpixels/sec
	Difference: 968 (12%)

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 (in units of megabytes per second) that can be transferred over the external memory interface in one second. It is calculated by multiplying the bus width by its memory clock speed. If it uses DDR type memory, it should be multiplied by 2 again. If DDR5, multiply by 4 instead. The better the card's memory bandwidth, the better the card will be in general. It especially helps with AA, High Dynamic Range and high resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that are applied per second. This number is calculated by multiplying the total texture units of the card by the core clock speed of the chip. The better this number, the better the graphics 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 maximum number of pixels that the graphics card can possibly write to the local memory in a second - measured in millions of pixels per second. The number is calculated by multiplying the number of colour ROPs by the clock speed of the card. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel output rate is also dependant on many other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the ability to get to the maximum fill rate.