Radeon HD 7750 vs Radeon RX 480 4GB

Intro

Compare those specifications to the Radeon RX 480 4GB, which features a core clock speed of 1120 MHz and a GDDR5 memory speed of 1750 MHz. It also uses a 256-bit memory bus, and makes use of a 14 nm design. It features 2304 SPUs, 144 Texture Address Units, and 32 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 7750		55 Watts
Radeon RX 480 4GB		150 Watts
	Difference: 95 Watts (173%)

Memory Bandwidth

In theory, the Radeon RX 480 4GB should be 219% quicker than the Radeon HD 7750 overall, due to its higher data rate. (explain)

Radeon RX 480 4GB		229376 MB/sec
Radeon HD 7750		72000 MB/sec
	Difference: 157376 (219%)

Texel Rate

The Radeon RX 480 4GB will be quite a bit (about 530%) better at texture filtering than the Radeon HD 7750. (explain)

Radeon RX 480 4GB		161280 Mtexels/sec
Radeon HD 7750		25600 Mtexels/sec
	Difference: 135680 (530%)

Pixel Rate

The Radeon RX 480 4GB is much (about 180%) better at anti-aliasing than the Radeon HD 7750, and able to handle higher screen resolutions more effectively. (explain)

Radeon RX 480 4GB		35840 Mpixels/sec
Radeon HD 7750		12800 Mpixels/sec
	Difference: 23040 (180%)

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 largest amount of data (in units of MB per second) that can be moved over the external memory interface in a second. It is calculated by multiplying the card's bus width by the speed of its memory. If the card has DDR memory, it must be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The better the card's 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 amount of texture map elements (texels) that can be processed per second. This is worked out by multiplying the total number of texture units of the card by the core clock speed of the chip. The better this number, the better the card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed per second.

Pixel Rate: Pixel rate is the most pixels the graphics card can possibly record to the local memory in a second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the number of colour ROPs by the the card's clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel rate is also dependant on quite a few other factors, especially the memory bandwidth of the card - the lower the bandwidth is, the lower the potential to reach the max fill rate.