GeForce RTX 3070 Ti vs Radeon HD 7990

Intro

Compare all of that to the Radeon HD 7990, which comes with core clock speeds of 950 MHz on the GPU, and 1500 MHz on the 3072 MB of GDDR5 memory. It features 2048 SPUs along with 128 Texture Address Units and 32 Rasterization Operator Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce RTX 3070 Ti		290 Watts
Radeon HD 7990		375 Watts
	Difference: 85 Watts (29%)

Memory Bandwidth

Performance-wise, the GeForce RTX 3070 Ti should in theory be a little bit better than the Radeon HD 7990 overall. (explain)

GeForce RTX 3070 Ti		622899 MB/sec
Radeon HD 7990		576000 MB/sec
	Difference: 46899 (8%)

Texel Rate

The GeForce RTX 3070 Ti is a lot (more or less 24%) more effective at AF than the Radeon HD 7990. (explain)

GeForce RTX 3070 Ti		302400 Mtexels/sec
Radeon HD 7990		243200 Mtexels/sec
	Difference: 59200 (24%)

Pixel Rate

If using lots of anti-aliasing is important to you, then the GeForce RTX 3070 Ti is a better choice, and very much so. (explain)

GeForce RTX 3070 Ti		151200 Mpixels/sec
Radeon HD 7990		60800 Mpixels/sec
	Difference: 90400 (149%)

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 (counted in megabytes per second) that can be moved across the external memory interface within a second. The number is worked out by multiplying the interface width by its memory speed. In the case of DDR RAM, it must be multiplied by 2 again. If DDR5, multiply by 4 instead. The better the card's memory bandwidth, the faster the card will be in general. It especially helps with AA, High Dynamic Range and high resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that are applied in one second. This number is worked out by multiplying the total number of texture units of the card by the core speed of the chip. The higher the texel rate, the better the 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 most pixels that the graphics card could possibly record to its local memory in one second - measured in millions of pixels per second. The number is worked out by multiplying the number of colour ROPs by the clock speed of the card. 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 quite a few other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the ability to reach the max fill rate.