GeForce GTX 980M vs Radeon HD 4650 512MB

Intro

Compare all of that to the Radeon HD 4650 512MB, which has GPU clock speed of 600 MHz, and 512 MB of DDR2 RAM set to run at 500 MHz through a 128-bit bus. It also is comprised of 320(64x5) Stream Processors, 32 Texture Address Units, and 8 Raster Operation Units.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 4650 512MB		55 Watts
GeForce GTX 980M		100 Watts
	Difference: 45 Watts (82%)

Memory Bandwidth

Theoretically speaking, the GeForce GTX 980M will be 700% faster than the Radeon HD 4650 512MB overall, because of its higher bandwidth. (explain)

GeForce GTX 980M		128000 MB/sec
Radeon HD 4650 512MB		16000 MB/sec
	Difference: 112000 (700%)

Texel Rate

The GeForce GTX 980M should be much (approximately 419%) more effective at anisotropic filtering than the Radeon HD 4650 512MB. (explain)

GeForce GTX 980M		99648 Mtexels/sec
Radeon HD 4650 512MB		19200 Mtexels/sec
	Difference: 80448 (419%)

Pixel Rate

The GeForce GTX 980M will be much (more or less 1284%) faster with regards to anti-aliasing than the Radeon HD 4650 512MB, and capable of handling higher screen resolutions while still performing well. (explain)

GeForce GTX 980M		66432 Mpixels/sec
Radeon HD 4650 512MB		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: Memory bandwidth is the max amount of information (counted in megabytes per second) that can be transferred past the external memory interface in a second. It is calculated by multiplying the card's interface width by its memory clock speed. If it uses DDR RAM, it should be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The better the card's memory bandwidth, the better 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 texture map elements (texels) that are applied in one second. This is calculated by multiplying the total number of texture units by the core clock speed of the chip. The better this number, the better the 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 amount of pixels that the graphics chip could 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 colour ROPs by the the core speed of the card. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel rate also depends on quite a few other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the potential to reach the maximum fill rate.