GeForce GTX 880M vs Radeon HD 4650 1GB

Intro

Compare those specifications to the Radeon HD 4650 1GB, which features a clock speed of 600 MHz and a GDDR3 memory speed of 700 MHz. It also makes use of a 128-bit bus, and uses a 55 nm design. It is made up of 320(64x5) SPUs, 32 Texture Address Units, and 8 Raster Operation Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 4650 1GB		55 Watts
GeForce GTX 880M		130 Watts
	Difference: 75 Watts (136%)

Memory Bandwidth

As far as performance goes, the GeForce GTX 880M should theoretically be quite a bit better than the Radeon HD 4650 1GB overall. (explain)

GeForce GTX 880M		128000 MB/sec
Radeon HD 4650 1GB		22400 MB/sec
	Difference: 105600 (471%)

Texel Rate

The GeForce GTX 880M is quite a bit (approximately 536%) better at texture filtering than the Radeon HD 4650 1GB. (explain)

GeForce GTX 880M		122112 Mtexels/sec
Radeon HD 4650 1GB		19200 Mtexels/sec
	Difference: 102912 (536%)

Pixel Rate

The GeForce GTX 880M will be much (more or less 536%) better at full screen anti-aliasing than the Radeon HD 4650 1GB, and should be able to handle higher screen resolutions more effectively. (explain)

GeForce GTX 880M		30528 Mpixels/sec
Radeon HD 4650 1GB		4800 Mpixels/sec
	Difference: 25728 (536%)

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 information (in units of megabytes per second) that can be transported over the external memory interface in one second. It's worked out by multiplying the bus width by its memory clock speed. If it uses DDR type RAM, the result should be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The higher the card's memory bandwidth, the better the card will be in general. It especially helps with AA, HDR and higher screen resolutions.

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

Pixel Rate: Pixel rate is the maximum number of pixels the graphics card could possibly record to the local memory in one second - measured in millions of pixels per second. The number is worked out by multiplying the number of Raster Operations Pipelines by the the core clock speed. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel output rate is also dependant on lots of other factors, especially the memory bandwidth of the card - the lower the bandwidth is, the lower the ability to get to the max fill rate.