GeForce GTX 970M vs Radeon HD 4650 1GB

Intro

Compare all that to the Radeon HD 4650 1GB, which features clock speeds of 600 MHz on the GPU, and 700 MHz on the 1024 MB of GDDR3 memory. It features 320(64x5) SPUs as well as 32 Texture Address Units and 8 Rasterization Operator Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 4650 1GB		55 Watts
GeForce GTX 970M		75 Watts
	Difference: 20 Watts (36%)

Memory Bandwidth

In theory, the GeForce GTX 970M should be 329% faster than the Radeon HD 4650 1GB in general, because of its greater bandwidth. (explain)

GeForce GTX 970M		96000 MB/sec
Radeon HD 4650 1GB		22400 MB/sec
	Difference: 73600 (329%)

Texel Rate

The GeForce GTX 970M is quite a bit (about 285%) better at anisotropic filtering than the Radeon HD 4650 1GB. (explain)

GeForce GTX 970M		73920 Mtexels/sec
Radeon HD 4650 1GB		19200 Mtexels/sec
	Difference: 54720 (285%)

Pixel Rate

If running with a high screen resolution is important to you, then the GeForce GTX 970M is superior to the Radeon HD 4650 1GB, by a large margin. (explain)

GeForce GTX 970M		44352 Mpixels/sec
Radeon HD 4650 1GB		4800 Mpixels/sec
	Difference: 39552 (824%)

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 MB per second) that can be transferred past the external memory interface in one second. The number is calculated by multiplying the bus width by its memory clock speed. If the card has DDR RAM, the result should be multiplied by 2 once again. If DDR5, multiply by 4 instead. 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 amount of texture map elements (texels) that are applied per second. This figure 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 video card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied in one second.

Pixel Rate: Pixel rate is the maximum number of pixels the graphics card could possibly write to the local memory per second - measured in millions of pixels per second. The number is calculated by multiplying the number of Raster Operations Pipelines by the the core speed of the card. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel fill rate is also dependant on lots of other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the ability to reach the max fill rate.