GeForce 920M vs Radeon HD 3850 512MB

Intro

Compare those specs to the Radeon HD 3850 512MB, which makes use of a 55 nm design. AMD has set the core speed at 668 MHz. The GDDR3 memory works at a speed of 828 MHz on this specific model. It features 320(64x5) SPUs along with 16 TAUs and 16 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Memory Bandwidth

As far as performance goes, the Radeon HD 3850 512MB should theoretically be much superior to the GeForce 920M in general. (explain)

Radeon HD 3850 512MB		52992 MB/sec
GeForce 920M		14400 MB/sec
	Difference: 38592 (268%)

Texel Rate

The GeForce 920M should be a lot (more or less 186%) better at texture filtering than the Radeon HD 3850 512MB. (explain)

GeForce 920M		30528 Mtexels/sec
Radeon HD 3850 512MB		10688 Mtexels/sec
	Difference: 19840 (186%)

Pixel Rate

The Radeon HD 3850 512MB should be much (more or less 40%) better at full screen anti-aliasing than the GeForce 920M, and also will be able to handle higher resolutions without losing too much performance. (explain)

Radeon HD 3850 512MB		10688 Mpixels/sec
GeForce 920M		7632 Mpixels/sec
	Difference: 3056 (40%)

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: Bandwidth is the largest amount of information (in units of MB per second) that can be transferred across the external memory interface in one second. The number is worked out by multiplying the card's interface width by its memory clock speed. If it uses DDR RAM, it should be multiplied by 2 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 high resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that can be processed per second. This is worked out by multiplying the total texture units of the card by the core speed of the chip. The higher the texel rate, the better the card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied in a second.

Pixel Rate: Pixel rate is the most pixels the video card can possibly record to its local memory per second - measured in millions of pixels per second. The number is worked out by multiplying the amount of colour ROPs by the clock speed of the card. ROPs (Raster Operations Pipelines - sometimes also referred to as 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, especially the memory bandwidth - the lower the bandwidth is, the lower the ability to get to the maximum fill rate.