GeForce 920M vs Radeon HD 3850 X2

Intro

Compare that to the Radeon HD 3850 X2, which features a core clock frequency of 668 MHz and a GDDR3 memory speed of 828 MHz. It also makes use of a 256-bit memory bus, and uses a 55 nm design. It features 320(64x5) SPUs, 16 TAUs, and 16 Raster Operation Units.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Memory Bandwidth

The Radeon HD 3850 X2, in theory, should perform quite a bit faster than the GeForce 920M in general. (explain)

Radeon HD 3850 X2		105984 MB/sec
GeForce 920M		14400 MB/sec
	Difference: 91584 (636%)

Texel Rate

The GeForce 920M should be a lot (about 43%) better at anisotropic filtering than the Radeon HD 3850 X2. (explain)

GeForce 920M		30528 Mtexels/sec
Radeon HD 3850 X2		21376 Mtexels/sec
	Difference: 9152 (43%)

Pixel Rate

The Radeon HD 3850 X2 will be a lot (about 180%) more effective at anti-aliasing than the GeForce 920M, and also will be capable of handling higher screen resolutions while still performing well. (explain)

Radeon HD 3850 X2		21376 Mpixels/sec
GeForce 920M		7632 Mpixels/sec
	Difference: 13744 (180%)

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: Bandwidth is the maximum amount of information (counted in MB per second) that can be transferred past the external memory interface in one second. The number is worked out by multiplying the card's bus width by the speed of its memory. In the case of DDR RAM, the result should be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The better the bandwidth is, the faster the card will be in general. It especially helps with anti-aliasing, HDR and higher screen resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that can be processed per second. This figure is worked out 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 texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied in one second.

Pixel Rate: Pixel rate is the most pixels that the graphics card could possibly write to its local memory per second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the amount of ROPs by the the card's clock speed. 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 fill rate also depends on lots of other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the potential to reach the max fill rate.