Radeon HD 7990 vs Radeon RX Vega 56

Intro

Compare all of that to the Radeon RX Vega 56, which features a clock frequency of 1156 MHz and a HBM2 memory speed of 1600 MHz. It also makes use of a 2048-bit bus, and uses a 14 nm design. It features 3584 SPUs, 224 Texture Address Units, and 64 Raster Operation Units.

Display Graphs

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Benchmarks

These are real-world performance benchmarks that were submitted by Hardware Compare users. The scores seen here are the average of all benchmarks submitted for each respective test and hardware.

3DMark Fire Strike Graphics Score

Radeon RX Vega 56		21011 points
Radeon HD 7990		15520 points
	Difference: 5491 (35%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon RX Vega 56		210 Watts
Radeon HD 7990		375 Watts
	Difference: 165 Watts (79%)

Memory Bandwidth

The Radeon HD 7990 should theoretically perform a lot faster than the Radeon RX Vega 56 overall. (explain)

Radeon HD 7990		576000 MB/sec
Radeon RX Vega 56		419430 MB/sec
	Difference: 156570 (37%)

Texel Rate

The Radeon RX Vega 56 will be a bit (more or less 6%) more effective at anisotropic filtering than the Radeon HD 7990. (explain)

Radeon RX Vega 56		258944 Mtexels/sec
Radeon HD 7990		243200 Mtexels/sec
	Difference: 15744 (6%)

Pixel Rate

The Radeon RX Vega 56 should be quite a bit (about 22%) faster with regards to FSAA than the Radeon HD 7990, and also able to handle higher resolutions more effectively. (explain)

Radeon RX Vega 56		73984 Mpixels/sec
Radeon HD 7990		60800 Mpixels/sec
	Difference: 13184 (22%)

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 maximum amount of information (measured in megabytes per second) that can be moved across the external memory interface within a second. The number is calculated by multiplying the bus width by the speed of its memory. If the card has DDR type memory, it should be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The higher the bandwidth is, the better the card will be in general. It especially helps with AA, High Dynamic Range and high resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that are processed in one second. This is calculated by multiplying the total number 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 applied per second.

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics card could possibly record to the local memory in one second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the number of ROPs by the the core clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel rate is also dependant on many other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the potential to reach the maximum fill rate.