Radeon HD 7770 vs Radeon RX 5500

Intro

Compare those specs to the Radeon RX 5500, which has a core clock speed of 1670 MHz and a GDDR6 memory speed of 1750 MHz. It also features a 128-bit memory bus, and uses a 7 nm design. It features 1408 SPUs, 88 Texture Address Units, and 32 Raster Operation Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 7770		80 Watts
Radeon RX 5500		150 Watts
	Difference: 70 Watts (88%)

Memory Bandwidth

The Radeon RX 5500 should in theory be much faster than the Radeon HD 7770 in general. (explain)

Radeon RX 5500		229376 MB/sec
Radeon HD 7770		72000 MB/sec
	Difference: 157376 (219%)

Texel Rate

The Radeon RX 5500 is much (more or less 267%) faster with regards to AF than the Radeon HD 7770. (explain)

Radeon RX 5500		146960 Mtexels/sec
Radeon HD 7770		40000 Mtexels/sec
	Difference: 106960 (267%)

Pixel Rate

The Radeon RX 5500 should be much (more or less 234%) better at anti-aliasing than the Radeon HD 7770, and also should be able to handle higher resolutions without slowing down too much. (explain)

Radeon RX 5500		53440 Mpixels/sec
Radeon HD 7770		16000 Mpixels/sec
	Difference: 37440 (234%)

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 data (in units of megabytes per second) that can be transferred over the external memory interface in one second. It's calculated by multiplying the interface width by the speed of its memory. If the card has DDR type RAM, it must be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The higher the memory bandwidth, the faster the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and higher screen resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that can be applied in one second. This figure is calculated by multiplying the total texture units of the card by the core 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 applied in a second.

Pixel Rate: Pixel rate is the most pixels the graphics card could possibly record to the local memory per second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the number of colour ROPs by the clock 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 quite a few other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the potential to get to the maximum fill rate.