GeForce GTX 980M vs Radeon HD 4650 1GB

Intro

Compare that to the Radeon HD 4650 1GB, which features GPU clock speed of 600 MHz, and 1024 MB of GDDR3 memory running at 700 MHz through a 128-bit bus. It also is made up of 320(64x5) Stream Processors, 32 Texture Address Units, and 8 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 4650 1GB		55 Watts
GeForce GTX 980M		100 Watts
	Difference: 45 Watts (82%)

Memory Bandwidth

In theory, the GeForce GTX 980M should be much faster than the Radeon HD 4650 1GB in general. (explain)

GeForce GTX 980M		128000 MB/sec
Radeon HD 4650 1GB		22400 MB/sec
	Difference: 105600 (471%)

Texel Rate

The GeForce GTX 980M will be much (about 419%) better at texture filtering than the Radeon HD 4650 1GB. (explain)

GeForce GTX 980M		99648 Mtexels/sec
Radeon HD 4650 1GB		19200 Mtexels/sec
	Difference: 80448 (419%)

Pixel Rate

The GeForce GTX 980M will be much (about 1284%) more effective at AA than the Radeon HD 4650 1GB, and also should be capable of handling higher resolutions more effectively. (explain)

GeForce GTX 980M		66432 Mpixels/sec
Radeon HD 4650 1GB		4800 Mpixels/sec
	Difference: 61632 (1284%)

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 largest amount of information (in units of MB per second) that can be transported past the external memory interface within a second. It is calculated by multiplying the card's interface width by its memory speed. If it uses DDR RAM, it must be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The better the memory bandwidth, the better the card will be in general. It especially helps with anti-aliasing, HDR and high resolutions.

Texel Rate: Texel rate is the maximum number 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 speed of the chip. The better this number, the better the graphics card will be at 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 video card can possibly record to the local memory in one second - measured in millions of pixels per second. The figure is calculated by multiplying the number of 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 memory bandwidth is, the lower the potential to reach the maximum fill rate.