GeForce GTX 950M vs Radeon HD 4650 512MB

Intro

Compare those specifications to the Radeon HD 4650 512MB, which has a clock frequency of 600 MHz and a DDR2 memory speed of 500 MHz. It also makes use of a 128-bit bus, and makes use of 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

Both cards have the same power consumption.

Memory Bandwidth

The GeForce GTX 950M should theoretically be quite a bit faster than the Radeon HD 4650 512MB overall. (explain)

GeForce GTX 950M		32000 MB/sec
Radeon HD 4650 512MB		16000 MB/sec
	Difference: 16000 (100%)

Texel Rate

The GeForce GTX 950M will be much (about 90%) better at anisotropic filtering than the Radeon HD 4650 512MB. (explain)

GeForce GTX 950M		36560 Mtexels/sec
Radeon HD 4650 512MB		19200 Mtexels/sec
	Difference: 17360 (90%)

Pixel Rate

The GeForce GTX 950M should be quite a bit (about 205%) faster with regards to anti-aliasing than the Radeon HD 4650 512MB, and also capable of handling higher screen resolutions without losing too much performance. (explain)

GeForce GTX 950M		14624 Mpixels/sec
Radeon HD 4650 512MB		4800 Mpixels/sec
	Difference: 9824 (205%)

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 maximum amount of information (counted in MB per second) that can be moved over the external memory interface within a second. It's worked out by multiplying the card's interface width by its memory clock speed. If it uses DDR RAM, it must be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The higher the card's memory bandwidth, the better the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and higher screen resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that are processed per second. This figure is calculated by multiplying the total amount of texture units by the core clock 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 applied per second.

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