Radeon RX 7900 XTX vs Radeon RX Vega 64

Intro

Compare all of that to the Radeon RX Vega 64, which comes with GPU core speed of 1247 MHz, and 8192 MB of HBM2 RAM set to run at 1890 MHz through a 2048-bit bus. It also features 4096 SPUs, 256 Texture Address Units, and 64 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon RX Vega 64		295 Watts
Radeon RX 7900 XTX		355 Watts
	Difference: 60 Watts (20%)

Memory Bandwidth

The Radeon RX 7900 XTX should in theory perform much faster than the Radeon RX Vega 64 overall. (explain)

Radeon RX 7900 XTX		983040 MB/sec
Radeon RX Vega 64		495411 MB/sec
	Difference: 487629 (98%)

Texel Rate

The Radeon RX 7900 XTX will be a lot (more or less 123%) more effective at anisotropic filtering than the Radeon RX Vega 64. (explain)

Radeon RX 7900 XTX		712320 Mtexels/sec
Radeon RX Vega 64		319232 Mtexels/sec
	Difference: 393088 (123%)

Pixel Rate

The Radeon RX 7900 XTX should be a lot (approximately 346%) faster with regards to anti-aliasing than the Radeon RX Vega 64, and will be capable of handling higher screen resolutions better. (explain)

Radeon RX 7900 XTX		356160 Mpixels/sec
Radeon RX Vega 64		79808 Mpixels/sec
	Difference: 276352 (346%)

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 max amount of information (measured in megabytes per second) that can be moved over the external memory interface in one second. It's worked out by multiplying the card's bus width by the speed of its memory. If the card has DDR memory, it must be multiplied by 2 once again. If DDR5, multiply by 4 instead. The higher 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 number of texture map elements (texels) that can be applied in one second. This figure is calculated by multiplying the total texture units of the card by the core clock speed of the chip. The better this number, the better the video card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied per second.

Pixel Rate: Pixel rate is the most pixels that the graphics chip can possibly write to the local memory in one second - measured in millions of pixels per second. The figure is calculated by multiplying the amount of Raster Operations Pipelines by the the core clock speed. ROPs (Raster Operations Pipelines - aka 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 - the lower the bandwidth is, the lower the ability to reach the max fill rate.