Radeon HD 7950 3GB vs Radeon RX 7900 XTX

Intro

Compare those specs to the Radeon RX 7900 XTX, which has a core clock speed of 1855 MHz and a GDDR6 memory speed of 2500 MHz. It also features a 384-bit memory bus, and uses a 5 nm design. It features 6144 SPUs, 384 Texture Address Units, and 192 Raster Operation Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 7950 3GB		200 Watts
Radeon RX 7900 XTX		355 Watts
	Difference: 155 Watts (78%)

Memory Bandwidth

Theoretically speaking, the Radeon RX 7900 XTX is 310% faster than the Radeon HD 7950 3GB overall, because of its higher bandwidth. (explain)

Radeon RX 7900 XTX		983040 MB/sec
Radeon HD 7950 3GB		240000 MB/sec
	Difference: 743040 (310%)

Texel Rate

The Radeon RX 7900 XTX will be much (more or less 695%) better at texture filtering than the Radeon HD 7950 3GB. (explain)

Radeon RX 7900 XTX		712320 Mtexels/sec
Radeon HD 7950 3GB		89600 Mtexels/sec
	Difference: 622720 (695%)

Pixel Rate

If running with lots of anti-aliasing is important to you, then the Radeon RX 7900 XTX is a better choice, and very much so. (explain)

Radeon RX 7900 XTX		356160 Mpixels/sec
Radeon HD 7950 3GB		25600 Mpixels/sec
	Difference: 330560 (1291%)

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: Memory bandwidth is the max amount of information (counted in MB per second) that can be transported past the external memory interface in a second. It's calculated by multiplying the bus width by its memory clock speed. If the card has DDR type RAM, it must be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The better the bandwidth is, the better the card will be in general. It especially helps with anti-aliasing, 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 number is calculated by multiplying the total amount of texture units of the card by the core clock speed of the chip. The better this number, the better the graphics card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels in a second.

Pixel Rate: Pixel rate is the maximum number of pixels the graphics card could possibly write to its local memory in a second - measured in millions of pixels per second. The figure is calculated by multiplying the amount of Render Output Units by the the core speed of the card. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel fill rate also depends on many other factors, especially the memory bandwidth of the card - the lower the bandwidth is, the lower the ability to reach the max fill rate.