Radeon HD 6750 1GB vs Radeon RX 480 4GB

Intro

Compare all of that to the Radeon RX 480 4GB, which has a GPU core clock speed of 1120 MHz, and 4096 MB of GDDR5 memory running at 1750 MHz through a 256-bit bus. It also features 2304 SPUs, 144 TAUs, and 32 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 6750 1GB		86 Watts
Radeon RX 480 4GB		150 Watts
	Difference: 64 Watts (74%)

Memory Bandwidth

As far as performance goes, the Radeon RX 480 4GB should in theory be a lot better than the Radeon HD 6750 1GB overall. (explain)

Radeon RX 480 4GB		229376 MB/sec
Radeon HD 6750 1GB		64000 MB/sec
	Difference: 165376 (258%)

Texel Rate

The Radeon RX 480 4GB will be a lot (more or less 518%) better at anisotropic filtering than the Radeon HD 6750 1GB. (explain)

Radeon RX 480 4GB		161280 Mtexels/sec
Radeon HD 6750 1GB		26100 Mtexels/sec
	Difference: 135180 (518%)

Pixel Rate

If running with a high screen resolution is important to you, then the Radeon RX 480 4GB is a better choice, by a large margin. (explain)

Radeon RX 480 4GB		35840 Mpixels/sec
Radeon HD 6750 1GB		11600 Mpixels/sec
	Difference: 24240 (209%)

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 megabytes per second) that can be transferred over the external memory interface within a second. The number is worked out by multiplying the bus width by the speed of its memory. If the card has DDR type memory, it must be multiplied by 2 again. If DDR5, multiply by 4 instead. The better the memory bandwidth, the better the card will be in general. It especially helps with anti-aliasing, HDR and higher screen resolutions.

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

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