Radeon HD 7990 vs Radeon RX 6950 XT

Intro

Compare all that to the Radeon RX 6950 XT, which uses a 7 nm design. AMD has set the core frequency at 1925 MHz. The GDDR6 RAM is set to run at a frequency of 2250 MHz on this specific model. It features 5120 SPUs along with 320 TAUs and 128 Rasterization Operator Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon RX 6950 XT		335 Watts
Radeon HD 7990		375 Watts
	Difference: 40 Watts (12%)

Memory Bandwidth

As far as performance goes, the Radeon RX 6950 XT should theoretically be a bit superior to the Radeon HD 7990 overall. (explain)

Radeon RX 6950 XT		589824 MB/sec
Radeon HD 7990		576000 MB/sec
	Difference: 13824 (2%)

Texel Rate

The Radeon RX 6950 XT is a lot (more or less 153%) better at texture filtering than the Radeon HD 7990. (explain)

Radeon RX 6950 XT		616000 Mtexels/sec
Radeon HD 7990		243200 Mtexels/sec
	Difference: 372800 (153%)

Pixel Rate

The Radeon RX 6950 XT should be a lot (approximately 305%) better at full screen anti-aliasing than the Radeon HD 7990, and should be able to handle higher resolutions while still performing well. (explain)

Radeon RX 6950 XT		246400 Mpixels/sec
Radeon HD 7990		60800 Mpixels/sec
	Difference: 185600 (305%)

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: Bandwidth is the max amount of data (in units of MB per second) that can be transferred past the external memory interface within a second. The number is worked out by multiplying the bus width by the speed of its memory. If it uses DDR type RAM, it must 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 AA, HDR and high resolutions.

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

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