GeForce GTX 850M vs Radeon HD 4850 1GB

Intro

Compare all of that to the Radeon HD 4850 1GB, which has a clock frequency of 625 MHz and a GDDR4 memory frequency of 993 MHz. It also features a 256-bit bus, and uses a 55 nm design. It is comprised of 800(160x5) SPUs, 40 TAUs, and 16 ROPs.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 850M		40 Watts
Radeon HD 4850 1GB		110 Watts
	Difference: 70 Watts (175%)

Memory Bandwidth

Theoretically, the Radeon HD 4850 1GB should perform quite a bit faster than the GeForce GTX 850M in general. (explain)

Radeon HD 4850 1GB		63552 MB/sec
GeForce GTX 850M		32000 MB/sec
	Difference: 31552 (99%)

Texel Rate

The GeForce GTX 850M is much (approximately 40%) faster with regards to texture filtering than the Radeon HD 4850 1GB. (explain)

GeForce GTX 850M		35040 Mtexels/sec
Radeon HD 4850 1GB		25000 Mtexels/sec
	Difference: 10040 (40%)

Pixel Rate

If running with lots of anti-aliasing is important to you, then the GeForce GTX 850M is superior to the Radeon HD 4850 1GB, by far. (explain)

GeForce GTX 850M		14016 Mpixels/sec
Radeon HD 4850 1GB		10000 Mpixels/sec
	Difference: 4016 (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: Memory bandwidth is the max amount of data (measured in megabytes per second) that can be transferred past the external memory interface within a second. The number is calculated by multiplying the card's bus width by its memory speed. If it uses DDR RAM, it must be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. The higher the memory bandwidth, the better the card will be in general. It especially helps with AA, High Dynamic Range and higher screen resolutions.

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

Pixel Rate: Pixel rate is the most pixels that the graphics card can possibly record to its local memory per second - measured in millions of pixels per second. The figure is worked out by multiplying the amount of Raster Operations Pipelines by the clock speed of the card. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel fill rate is also dependant on lots of other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the ability to reach the maximum fill rate.