GeForce RTX 4090 vs Radeon RX 6750 XT

Intro

Compare all of that to the Radeon RX 6750 XT, which features GPU clock speed of 2150 MHz, and 12288 MB of GDDR6 RAM running at 2250 MHz through a 192-bit bus. It also is comprised of 2560 SPUs, 160 TAUs, and 64 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon RX 6750 XT		250 Watts
GeForce RTX 4090		450 Watts
	Difference: 200 Watts (80%)

Memory Bandwidth

In theory, the GeForce RTX 4090 should perform quite a bit faster than the Radeon RX 6750 XT in general. (explain)

GeForce RTX 4090		1042432 MB/sec
Radeon RX 6750 XT		442368 MB/sec
	Difference: 600064 (136%)

Texel Rate

The GeForce RTX 4090 will be quite a bit (more or less 233%) faster with regards to anisotropic filtering than the Radeon RX 6750 XT. (explain)

GeForce RTX 4090		1144320 Mtexels/sec
Radeon RX 6750 XT		344000 Mtexels/sec
	Difference: 800320 (233%)

Pixel Rate

The GeForce RTX 4090 is a lot (approximately 186%) better at FSAA than the Radeon RX 6750 XT, and also capable of handling higher resolutions without losing too much performance. (explain)

GeForce RTX 4090		393360 Mpixels/sec
Radeon RX 6750 XT		137600 Mpixels/sec
	Difference: 255760 (186%)

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 data (in units of megabytes per second) that can be transferred over the external memory interface in a second. It is worked out by multiplying the bus width by the speed of its memory. If the card has DDR RAM, it must be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The higher the card's memory bandwidth, the better the card will be in general. It especially helps with AA, High Dynamic Range and higher screen resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that can be processed in one second. This number is calculated by multiplying the total amount of texture units by the core clock speed of the chip. The higher 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 amount of pixels the video card can possibly write 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 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 is also dependant on lots of other factors, especially the memory bandwidth of the card - the lower the memory bandwidth is, the lower the ability to reach the max fill rate.