Radeon HD 6750 vs Radeon RX 480

Intro

Compare those specs to the Radeon RX 480, which features a clock speed of 1120 MHz and a GDDR5 memory speed of 2000 MHz. It also features a 256-bit memory bus, and uses a 14 nm design. It is comprised of 2304 SPUs, 144 TAUs, and 32 Raster Operation Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

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

Memory Bandwidth

In theory, the Radeon RX 480 is 310% quicker than the Radeon HD 6750 in general, because of its greater data rate. (explain)

Radeon RX 480		262144 MB/sec
Radeon HD 6750		64000 MB/sec
	Difference: 198144 (310%)

Texel Rate

The Radeon RX 480 is a lot (more or less 518%) better at anisotropic filtering than the Radeon HD 6750. (explain)

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

Pixel Rate

The Radeon RX 480 will be quite a bit (more or less 209%) more effective at AA than the Radeon HD 6750, and also will be capable of handling higher screen resolutions without slowing down too much. (explain)

Radeon RX 480		35840 Mpixels/sec
Radeon HD 6750		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 transported across the external memory interface in a second. It's calculated by multiplying the card's bus width by its memory speed. If it uses DDR RAM, it must be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The better the memory bandwidth, the better the card will be in general. It especially helps with AA, HDR and high resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that can be processed per second. This is worked out 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 handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels per second.

Pixel Rate: Pixel rate is the maximum amount of pixels the graphics card can possibly write to its local memory in one second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the amount of Render Output Units 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 fill rate also depends on lots of other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the ability to get to the maximum fill rate.