Radeon HD 7950 3GB vs Radeon RX 6650 XT

Intro

Compare that to the Radeon RX 6650 XT, which features a clock speed of 2055 MHz and a GDDR6 memory speed of 2190 MHz. It also uses a 128-bit memory bus, and makes use of a 7 nm design. It is made up of 2048 SPUs, 128 TAUs, and 64 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon RX 6650 XT		176 Watts
Radeon HD 7950 3GB		200 Watts
	Difference: 24 Watts (14%)

Memory Bandwidth

As far as performance goes, the Radeon RX 6650 XT should in theory be a bit better than the Radeon HD 7950 3GB overall. (explain)

Radeon RX 6650 XT		287072 MB/sec
Radeon HD 7950 3GB		240000 MB/sec
	Difference: 47072 (20%)

Texel Rate

The Radeon RX 6650 XT should be a lot (more or less 194%) faster with regards to texture filtering than the Radeon HD 7950 3GB. (explain)

Radeon RX 6650 XT		263040 Mtexels/sec
Radeon HD 7950 3GB		89600 Mtexels/sec
	Difference: 173440 (194%)

Pixel Rate

The Radeon RX 6650 XT should be much (about 414%) more effective at anti-aliasing than the Radeon HD 7950 3GB, and will be able to handle higher screen resolutions more effectively. (explain)

Radeon RX 6650 XT		131520 Mpixels/sec
Radeon HD 7950 3GB		25600 Mpixels/sec
	Difference: 105920 (414%)

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 data (counted in megabytes per second) that can be transferred over the external memory interface in one second. It is worked out by multiplying the card's interface width by its memory clock speed. If the card has DDR type RAM, it must be multiplied by 2 once again. If DDR5, multiply by 4 instead. The higher the card's memory bandwidth, the faster the card will be in general. It especially helps with AA, High Dynamic Range and higher screen resolutions.

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

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics card can possibly write to its local memory in one second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the amount of Render Output Units by the clock speed of the card. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel fill rate is also dependant on many other factors, most notably the memory bandwidth of the card - the lower the memory bandwidth is, the lower the potential to get to the max fill rate.