GeForce 930M vs Radeon HD 4850 X2 512MB

Intro

Compare those specifications to the Radeon HD 4850 X2 512MB, which uses a 55 nm design. AMD has set the core frequency at 625 MHz. The GDDR3 RAM is set to run at a speed of 993 MHz on this particular card. It features 800(160x5) SPUs as well as 40 Texture Address Units and 16 Rasterization Operator Units.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Memory Bandwidth

The Radeon HD 4850 X2 512MB should theoretically be a lot faster than the GeForce 930M overall. (explain)

Radeon HD 4850 X2 512MB		127104 MB/sec
GeForce 930M		14400 MB/sec
	Difference: 112704 (783%)

Texel Rate

The Radeon HD 4850 X2 512MB should be much (more or less 124%) more effective at anisotropic filtering than the GeForce 930M. (explain)

Radeon HD 4850 X2 512MB		50000 Mtexels/sec
GeForce 930M		22272 Mtexels/sec
	Difference: 27728 (124%)

Pixel Rate

If running with a high resolution is important to you, then the Radeon HD 4850 X2 512MB is superior to the GeForce 930M, by a large margin. (explain)

Radeon HD 4850 X2 512MB		20000 Mpixels/sec
GeForce 930M		7424 Mpixels/sec
	Difference: 12576 (169%)

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.

One or more cards in this comparison are multi-core. This means that their bandwidth, texel and pixel rates are theoretically doubled - this does not mean the card will actually perform twice as fast, but only that it should in theory be able to. Actual game benchmarks will give a more accurate idea of what it's capable of.

Price Comparison

Specifications

Memory Bandwidth: Memory bandwidth is the max amount of information (in units of MB per second) that can be moved past the external memory interface in one second. It's worked out by multiplying the bus width by its memory speed. In the case of DDR type RAM, it should be multiplied by 2 again. If DDR5, multiply by 4 instead. The better 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 amount of texture map elements (texels) that can be processed in one second. This number is worked out by multiplying the total number of texture units of the card by the core clock speed of the chip. The better this number, the better the video card will be at 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 that the graphics card could possibly record to its local memory per second - measured in millions of pixels per second. The figure is calculated by multiplying the number of Render Output Units 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 lots of other factors, most notably the memory bandwidth of the card - the lower the memory bandwidth is, the lower the potential to reach the maximum fill rate.