Radeon HD 7970 vs Radeon RX Vega 64

Intro

Compare all that 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 RAM. It features 4096 SPUs as well as 256 Texture Address Units and 64 ROPs.

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 7970		8225 points
	Difference: 13761 (167%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 7970		250 Watts
Radeon RX Vega 64		295 Watts
	Difference: 45 Watts (18%)

Memory Bandwidth

In theory, the Radeon RX Vega 64 should be much faster than the Radeon HD 7970 overall. (explain)

Radeon RX Vega 64		495411 MB/sec
Radeon HD 7970		264000 MB/sec
	Difference: 231411 (88%)

Texel Rate

The Radeon RX Vega 64 is much (more or less 170%) better at AF than the Radeon HD 7970. (explain)

Radeon RX Vega 64		319232 Mtexels/sec
Radeon HD 7970		118400 Mtexels/sec
	Difference: 200832 (170%)

Pixel Rate

The Radeon RX Vega 64 will be much (more or less 170%) faster with regards to AA than the Radeon HD 7970, and also will be able to handle higher resolutions better. (explain)

Radeon RX Vega 64		79808 Mpixels/sec
Radeon HD 7970		29600 Mpixels/sec
	Difference: 50208 (170%)

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 (measured in megabytes per second) that can be transferred over the external memory interface within a second. It's calculated by multiplying the card's bus width by its memory clock speed. If the card has DDR RAM, it must be multiplied by 2 once again. If DDR5, multiply by 4 instead. 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 texture map elements (texels) that can be processed per second. This number is worked out by multiplying the total number of texture units by the core speed of the chip. The better the texel rate, the better the card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed in a second.

Pixel Rate: Pixel rate is the maximum number of pixels the graphics card could possibly write to its local memory in one second - measured in millions of pixels per second. The figure is worked out by multiplying the number of colour ROPs by the the card's clock speed. ROPs (Raster Operations Pipelines - also sometimes called 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 memory bandwidth is, the lower the ability to get to the maximum fill rate.