GeForce 920M vs Radeon HD 4650 512MB

Intro

Compare all of that to the Radeon HD 4650 512MB, which makes use of a 55 nm design. AMD has clocked the core speed at 600 MHz. The DDR2 RAM works at a frequency of 500 MHz on this model. It features 320(64x5) SPUs along with 32 Texture Address Units and 8 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Memory Bandwidth

Theoretically, the Radeon HD 4650 512MB should be a little bit faster than the GeForce 920M in general. (explain)

Radeon HD 4650 512MB		16000 MB/sec
GeForce 920M		14400 MB/sec
	Difference: 1600 (11%)

Texel Rate

The GeForce 920M should be a lot (about 59%) better at AF than the Radeon HD 4650 512MB. (explain)

GeForce 920M		30528 Mtexels/sec
Radeon HD 4650 512MB		19200 Mtexels/sec
	Difference: 11328 (59%)

Pixel Rate

The GeForce 920M should be a lot (more or less 59%) more effective at anti-aliasing than the Radeon HD 4650 512MB, and also will be able to handle higher resolutions without slowing down too much. (explain)

GeForce 920M		7632 Mpixels/sec
Radeon HD 4650 512MB		4800 Mpixels/sec
	Difference: 2832 (59%)

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 (in units of MB per second) that can be transported over the external memory interface in one second. The number is calculated by multiplying the card's bus width by its memory speed. If the card has DDR RAM, the result should be multiplied by 2 again. If DDR5, multiply by 4 instead. The better the bandwidth is, the better the card will be in general. It especially helps with anti-aliasing, HDR and higher screen resolutions.

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

Pixel Rate: Pixel rate is the most pixels that the graphics chip can possibly write to its local memory per 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 - also called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel rate also depends on quite a few other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the ability to reach the maximum fill rate.