Radeon HD 6790 vs Radeon RX 7900 XTX

Intro

Compare those specifications to the Radeon RX 7900 XTX, which features a core clock frequency of 1855 MHz and a GDDR6 memory frequency of 2500 MHz. It also makes use of a 384-bit memory bus, and makes use of a 5 nm design. It is made up of 6144 SPUs, 384 TAUs, and 192 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 6790		150 Watts
Radeon RX 7900 XTX		355 Watts
	Difference: 205 Watts (137%)

Memory Bandwidth

The Radeon RX 7900 XTX should theoretically be a lot faster than the Radeon HD 6790 in general. (explain)

Radeon RX 7900 XTX		983040 MB/sec
Radeon HD 6790		134400 MB/sec
	Difference: 848640 (631%)

Texel Rate

The Radeon RX 7900 XTX should be a lot (about 2020%) more effective at texture filtering than the Radeon HD 6790. (explain)

Radeon RX 7900 XTX		712320 Mtexels/sec
Radeon HD 6790		33600 Mtexels/sec
	Difference: 678720 (2020%)

Pixel Rate

If using a high resolution is important to you, then the Radeon RX 7900 XTX is the winner, by far. (explain)

Radeon RX 7900 XTX		356160 Mpixels/sec
Radeon HD 6790		13440 Mpixels/sec
	Difference: 342720 (2550%)

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 largest amount of information (measured in megabytes per second) that can be transferred over the external memory interface in a second. It is calculated by multiplying the card's bus width by its memory speed. If the card has DDR type memory, the result should be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The higher the memory bandwidth, the better the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and high resolutions.

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

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