Radeon HD 7990 vs Radeon RX Vega 64

Intro

Compare those specifications to the Radeon RX Vega 64, which has clock speeds of 1247 MHz on the GPU, and 1890 MHz on the 8192 MB of HBM2 memory. It features 4096 SPUs as well as 256 Texture Address Units and 64 Rasterization Operator 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 64		21986 points
Radeon HD 7990		15520 points
	Difference: 6466 (42%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon RX Vega 64		295 Watts
Radeon HD 7990		375 Watts
	Difference: 80 Watts (27%)

Memory Bandwidth

As far as performance goes, the Radeon HD 7990 should in theory be a bit superior to the Radeon RX Vega 64 in general. (explain)

Radeon HD 7990		576000 MB/sec
Radeon RX Vega 64		495411 MB/sec
	Difference: 80589 (16%)

Texel Rate

The Radeon RX Vega 64 is much (more or less 31%) more effective at AF than the Radeon HD 7990. (explain)

Radeon RX Vega 64		319232 Mtexels/sec
Radeon HD 7990		243200 Mtexels/sec
	Difference: 76032 (31%)

Pixel Rate

The Radeon RX Vega 64 will be quite a bit (approximately 31%) better at full screen anti-aliasing than the Radeon HD 7990, and will be capable of handling higher screen resolutions while still performing well. (explain)

Radeon RX Vega 64		79808 Mpixels/sec
Radeon HD 7990		60800 Mpixels/sec
	Difference: 19008 (31%)

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 largest amount of data (measured in MB per second) that can be transported past the external memory interface in one second. It is worked out by multiplying the card's bus width by its memory clock speed. If the card has DDR memory, it must be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The better the memory bandwidth, the better the card will be in general. It especially helps with anti-aliasing, HDR and high resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that are processed in one second. This figure is calculated by multiplying the total amount of texture units by the core speed of the chip. The better 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 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 ROPs by the clock speed of the card. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel fill rate also depends on lots of other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the potential to get to the maximum fill rate.