GeForce GTX 950M vs Radeon HD 4850 X2 1GB

Intro

Compare all of that to the Radeon HD 4850 X2 1GB, which features GPU clock speed of 625 MHz, and 1024 MB of GDDR3 memory running at 993 MHz through a 256-bit bus. It also features 800(160x5) SPUs, 40 Texture Address Units, and 16 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 950M		55 Watts
Radeon HD 4850 X2 1GB		250 Watts
	Difference: 195 Watts (355%)

Memory Bandwidth

Theoretically speaking, the Radeon HD 4850 X2 1GB will be 297% quicker than the GeForce GTX 950M in general, due to its greater data rate. (explain)

Radeon HD 4850 X2 1GB		127104 MB/sec
GeForce GTX 950M		32000 MB/sec
	Difference: 95104 (297%)

Texel Rate

The Radeon HD 4850 X2 1GB should be quite a bit (more or less 37%) more effective at anisotropic filtering than the GeForce GTX 950M. (explain)

Radeon HD 4850 X2 1GB		50000 Mtexels/sec
GeForce GTX 950M		36560 Mtexels/sec
	Difference: 13440 (37%)

Pixel Rate

The Radeon HD 4850 X2 1GB is much (more or less 37%) more effective at FSAA than the GeForce GTX 950M, and will be able to handle higher screen resolutions without losing too much performance. (explain)

Radeon HD 4850 X2 1GB		20000 Mpixels/sec
GeForce GTX 950M		14624 Mpixels/sec
	Difference: 5376 (37%)

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 max amount of data (counted in MB per second) that can be transported across the external memory interface within a second. It's calculated by multiplying the card's interface width by the speed of its memory. If it uses DDR type RAM, it must be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The higher the 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 applied per second. This is calculated by multiplying the total amount of texture units by the core speed of the chip. The better this number, the better the video card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels in a second.

Pixel Rate: Pixel rate is the most pixels the video card could possibly write to the local memory per second - measured in millions of pixels per second. The figure is worked out by multiplying the number of Render Output Units by the the core clock speed. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel rate is also dependant on many other factors, especially the memory bandwidth of the card - the lower the memory bandwidth is, the lower the ability to get to the maximum fill rate.