Radeon HD 6750 1GB vs Radeon RX 590

Intro

Compare those specifications to the Radeon RX 590, which comes with a clock speed of 1469 MHz and a GDDR5 memory frequency of 2000 MHz. It also uses a 256-bit memory bus, and uses a 12 nm design. It features 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 1GB		86 Watts
Radeon RX 590		175 Watts
	Difference: 89 Watts (103%)

Memory Bandwidth

Theoretically speaking, the Radeon RX 590 should be 310% faster than the Radeon HD 6750 1GB overall, due to its greater data rate. (explain)

Radeon RX 590		262144 MB/sec
Radeon HD 6750 1GB		64000 MB/sec
	Difference: 198144 (310%)

Texel Rate

The Radeon RX 590 will be quite a bit (approximately 710%) more effective at anisotropic filtering than the Radeon HD 6750 1GB. (explain)

Radeon RX 590		211536 Mtexels/sec
Radeon HD 6750 1GB		26100 Mtexels/sec
	Difference: 185436 (710%)

Pixel Rate

If using high levels of AA is important to you, then the Radeon RX 590 is superior to the Radeon HD 6750 1GB, and very much so. (explain)

Radeon RX 590		47008 Mpixels/sec
Radeon HD 6750 1GB		11600 Mpixels/sec
	Difference: 35408 (305%)

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 (in units of MB per second) that can be moved across the external memory interface in a second. It's worked out by multiplying the card's bus width by its memory speed. If it uses DDR type memory, it must be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The better the bandwidth is, the faster the card will be in general. It especially helps with anti-aliasing, HDR and higher screen resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that can be processed per second. This figure is calculated by multiplying the total texture units of the card by the core speed of the chip. The better the texel rate, the better the graphics 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 card could possibly record to the local memory in one second - measured in millions of pixels per second. The figure is calculated by multiplying the number of Render Output Units 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 rate also depends on quite a few other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the potential to get to the maximum fill rate.