GeForce RTX 4070 Ti vs Radeon HD 7990

Intro

Compare those specs to the Radeon HD 7990, which uses a 28 nm design. AMD has clocked the core speed at 950 MHz. The GDDR5 RAM works at a frequency of 1500 MHz on this particular model. It features 2048 SPUs as well as 128 TAUs and 32 Rasterization Operator Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce RTX 4070 Ti		285 Watts
Radeon HD 7990		375 Watts
	Difference: 90 Watts (32%)

Memory Bandwidth

Theoretically, the Radeon HD 7990 should be a small bit faster than the GeForce RTX 4070 Ti in general. (explain)

Radeon HD 7990		576000 MB/sec
GeForce RTX 4070 Ti		516096 MB/sec
	Difference: 59904 (12%)

Texel Rate

The GeForce RTX 4070 Ti will be a lot (more or less 128%) more effective at AF than the Radeon HD 7990. (explain)

GeForce RTX 4070 Ti		554400 Mtexels/sec
Radeon HD 7990		243200 Mtexels/sec
	Difference: 311200 (128%)

Pixel Rate

The GeForce RTX 4070 Ti is quite a bit (approximately 204%) more effective at FSAA than the Radeon HD 7990, and able to handle higher resolutions better. (explain)

GeForce RTX 4070 Ti		184800 Mpixels/sec
Radeon HD 7990		60800 Mpixels/sec
	Difference: 124000 (204%)

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: Memory bandwidth is the max amount of data (measured in megabytes per second) that can be transported over the external memory interface in one second. It's calculated by multiplying the card's bus width by its memory clock speed. In the case of DDR type memory, the result should be multiplied by 2 again. If DDR5, multiply by 4 instead. The better the bandwidth is, the faster the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and higher screen resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that are processed per second. This number is worked out by multiplying the total number of texture units by the core clock speed of the chip. The better the texel rate, the better the 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 maximum amount of pixels that the graphics card can possibly record to the local memory in one second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the amount of colour ROPs by the the core clock speed. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel rate also depends on many other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the potential to reach the max fill rate.