GeForce GTX 980M vs Radeon HD 4650 1GB

Intro

Compare all that to the Radeon HD 4650 1GB, which has a GPU core clock speed of 600 MHz, and 1024 MB of GDDR3 RAM set to run 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 471% quicker than the Radeon HD 4650 1GB overall, due to its higher data rate. (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 (approximately 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 quite a bit (approximately 1284%) faster with regards to full screen anti-aliasing than the Radeon HD 4650 1GB, and also capable of handling higher screen resolutions better. (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 maximum amount of information (measured in MB per second) that can be transported across the external memory interface in one second. The number is calculated by multiplying the card's bus width by its memory clock speed. If it uses DDR RAM, it should be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The better the bandwidth is, 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 texture map elements (texels) that are applied per second. This figure is worked out by multiplying the total texture units 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 processed per 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 figure is calculated by multiplying the amount of Raster Operations Pipelines by the clock speed of the card. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel fill rate also depends on many other factors, especially the memory bandwidth of the card - the lower the bandwidth is, the lower the potential to get to the max fill rate.