Radeon HD 4870 X2 vs Radeon RX 5500

Intro

Compare all that to the Radeon RX 5500, which features GPU clock speed of 1670 MHz, and 4096 MB of GDDR6 RAM set to run at 1750 MHz through a 128-bit bus. It also features 1408 Stream Processors, 88 Texture Address Units, and 32 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon RX 5500		150 Watts
Radeon HD 4870 X2		350 Watts
	Difference: 200 Watts (133%)

Memory Bandwidth

Theoretically speaking, the Radeon HD 4870 X2 is 0% faster than the Radeon RX 5500 overall, because of its higher data rate. (explain)

Radeon HD 4870 X2		230400 MB/sec
Radeon RX 5500		229376 MB/sec
	Difference: 1024 (0%)

Texel Rate

The Radeon RX 5500 should be quite a bit (about 145%) faster with regards to texture filtering than the Radeon HD 4870 X2. (explain)

Radeon RX 5500		146960 Mtexels/sec
Radeon HD 4870 X2		60000 Mtexels/sec
	Difference: 86960 (145%)

Pixel Rate

The Radeon RX 5500 should be a lot (approximately 123%) faster with regards to FSAA than the Radeon HD 4870 X2, and capable of handling higher screen resolutions without slowing down too much. (explain)

Radeon RX 5500		53440 Mpixels/sec
Radeon HD 4870 X2		24000 Mpixels/sec
	Difference: 29440 (123%)

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.

One or more cards in this comparison are multi-core. This means that their bandwidth, texel and pixel rates are theoretically doubled - this does not mean the card will actually perform twice as fast, but only that it should in theory be able to. Actual game benchmarks will give a more accurate idea of what it's capable of.

Price Comparison

Specifications

Memory Bandwidth: Memory bandwidth is the maximum amount of data (measured in megabytes per second) that can be transported across the external memory interface in one second. The number is calculated by multiplying the bus width by the speed of its memory. If it uses DDR RAM, it should be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The higher the memory bandwidth, the faster the card will be in general. It especially helps with AA, HDR and higher screen resolutions.

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

Pixel Rate: Pixel rate is the maximum amount of pixels the video card can possibly record to its local memory per second - measured in millions of pixels per second. The figure is worked out by multiplying the amount of ROPs by the the core clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel rate also depends on many other factors, most notably the memory bandwidth of the card - the lower the bandwidth is, the lower the ability to reach the maximum fill rate.