GeForce GTX 850M vs Radeon HD 4730

Intro

Compare all that to the Radeon HD 4730, which uses a 55 nm design. AMD has clocked the core speed at 700 MHz. The GDDR5 RAM works at a speed of 900 MHz on this card. It features 640(128x5) SPUs along with 32 TAUs and 8 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 850M		40 Watts
Radeon HD 4730		140 Watts
	Difference: 100 Watts (250%)

Memory Bandwidth

The Radeon HD 4730, in theory, should be a lot faster than the GeForce GTX 850M overall. (explain)

Radeon HD 4730		57600 MB/sec
GeForce GTX 850M		32000 MB/sec
	Difference: 25600 (80%)

Texel Rate

The GeForce GTX 850M should be a lot (approximately 56%) better at anisotropic filtering than the Radeon HD 4730. (explain)

GeForce GTX 850M		35040 Mtexels/sec
Radeon HD 4730		22400 Mtexels/sec
	Difference: 12640 (56%)

Pixel Rate

If using a high resolution is important to you, then the GeForce GTX 850M is superior to the Radeon HD 4730, by a large margin. (explain)

GeForce GTX 850M		14016 Mpixels/sec
Radeon HD 4730		5600 Mpixels/sec
	Difference: 8416 (150%)

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 max amount of information (counted in MB per second) that can be transported across the external memory interface within a second. It is worked out by multiplying the card's interface width by its memory speed. In the case of DDR type memory, the result should be multiplied by 2 once again. If DDR5, multiply by 4 instead. The higher the card's memory bandwidth, the faster the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and high resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that are applied in one second. This number is calculated by multiplying the total texture units of the card by the core speed of the chip. The better the texel rate, the better the card will be at handling 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 could possibly record to its local memory in one second - measured in millions of pixels per second. The figure is calculated by multiplying the amount of colour ROPs by the the core clock speed. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel fill rate is also dependant on many other factors, especially the memory bandwidth of the card - the lower the bandwidth is, the lower the ability to reach the max fill rate.