Radeon HD 7870 vs Radeon RX 6650 XT

Intro

Compare those specifications to the Radeon RX 6650 XT, which comes with clock speeds of 2055 MHz on the GPU, and 2190 MHz on the 8192 MB of GDDR6 memory. It features 2048 SPUs as well as 128 TAUs and 64 Rasterization Operator Units.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 7870		175 Watts
Radeon RX 6650 XT		176 Watts
	Difference: 1 Watts (1%)

Memory Bandwidth

As far as performance goes, the Radeon RX 6650 XT should in theory be quite a bit superior to the Radeon HD 7870 in general. (explain)

Radeon RX 6650 XT		287072 MB/sec
Radeon HD 7870		153600 MB/sec
	Difference: 133472 (87%)

Texel Rate

The Radeon RX 6650 XT will be quite a bit (about 229%) faster with regards to anisotropic filtering than the Radeon HD 7870. (explain)

Radeon RX 6650 XT		263040 Mtexels/sec
Radeon HD 7870		80000 Mtexels/sec
	Difference: 183040 (229%)

Pixel Rate

The Radeon RX 6650 XT is quite a bit (more or less 311%) better at FSAA than the Radeon HD 7870, and will be capable of handling higher resolutions better. (explain)

Radeon RX 6650 XT		131520 Mpixels/sec
Radeon HD 7870		32000 Mpixels/sec
	Difference: 99520 (311%)

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 max amount of information (in units of MB per second) that can be moved past the external memory interface within a second. The number is worked out by multiplying the card's bus width by its memory speed. If the card has DDR type RAM, it should 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 anti-aliasing, HDR and high resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that can be applied per second. This number is calculated by multiplying the total texture units by the core speed of the chip. The better the texel rate, the better the video card will be at handling 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 its local memory in one second - measured in millions of pixels per second. The figure is calculated by multiplying the amount of ROPs by the clock speed of the card. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel output rate also depends on quite a few other factors, especially the memory bandwidth of the card - the lower the memory bandwidth is, the lower the ability to get to the maximum fill rate.