GeForce GTX 960M vs Radeon HD 4650 512MB

Intro

Compare all that to the Radeon HD 4650 512MB, which makes use of a 55 nm design. AMD has set the core speed at 600 MHz. The DDR2 memory runs at a speed of 500 MHz on this particular card. It features 320(64x5) SPUs as well as 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 512MB		55 Watts
GeForce GTX 960M		65 Watts
	Difference: 10 Watts (18%)

Memory Bandwidth

In theory, the GeForce GTX 960M should perform quite a bit faster than the Radeon HD 4650 512MB in general. (explain)

GeForce GTX 960M		64000 MB/sec
Radeon HD 4650 512MB		16000 MB/sec
	Difference: 48000 (300%)

Texel Rate

The GeForce GTX 960M should be a lot (more or less 128%) better at anisotropic filtering than the Radeon HD 4650 512MB. (explain)

GeForce GTX 960M		43840 Mtexels/sec
Radeon HD 4650 512MB		19200 Mtexels/sec
	Difference: 24640 (128%)

Pixel Rate

The GeForce GTX 960M should be much (more or less 265%) more effective at full screen anti-aliasing than the Radeon HD 4650 512MB, and also will be capable of handling higher screen resolutions better. (explain)

GeForce GTX 960M		17536 Mpixels/sec
Radeon HD 4650 512MB		4800 Mpixels/sec
	Difference: 12736 (265%)

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 data (counted in MB per second) that can be moved over the external memory interface in a second. It is calculated by multiplying the interface width by the speed of its memory. In the case of DDR type RAM, it must be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The higher the memory bandwidth, the faster the card will be in general. It especially helps with anti-aliasing, HDR and high resolutions.

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

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics chip could possibly write to its local memory in a second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the amount of colour ROPs by the clock speed of the card. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel rate is also dependant on many other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the ability to reach the max fill rate.