Radeon HD 7870 vs Radeon RX Vega 64

Intro

Compare all that to the Radeon RX Vega 64, which makes use of a 14 nm design. AMD has set the core speed at 1247 MHz. The HBM2 memory works at a speed of 1890 MHz on this specific model. It features 4096 SPUs along with 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 7870		6230 points
	Difference: 15756 (253%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 7870		175 Watts
Radeon RX Vega 64		295 Watts
	Difference: 120 Watts (69%)

Memory Bandwidth

Theoretically speaking, the Radeon RX Vega 64 should be much faster than the Radeon HD 7870 overall. (explain)

Radeon RX Vega 64		495411 MB/sec
Radeon HD 7870		153600 MB/sec
	Difference: 341811 (223%)

Texel Rate

The Radeon RX Vega 64 will be much (more or less 299%) more effective at AF than the Radeon HD 7870. (explain)

Radeon RX Vega 64		319232 Mtexels/sec
Radeon HD 7870		80000 Mtexels/sec
	Difference: 239232 (299%)

Pixel Rate

The Radeon RX Vega 64 will be quite a bit (approximately 149%) faster with regards to full screen anti-aliasing than the Radeon HD 7870, and should be able to handle higher resolutions better. (explain)

Radeon RX Vega 64		79808 Mpixels/sec
Radeon HD 7870		32000 Mpixels/sec
	Difference: 47808 (149%)

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 data (measured in megabytes per second) that can be moved across the external memory interface within a second. It's worked out by multiplying the bus width by its memory speed. If it uses DDR memory, the result should be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The higher the card's memory bandwidth, the faster the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and higher screen resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that can be processed per second. This figure is worked out by multiplying the total texture units of the card by the core clock speed of the chip. The higher the texel rate, the better the card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels per second.

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics chip can possibly write to its local memory in a second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the amount of Raster Operations Pipelines by the clock speed of the card. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel rate is also dependant on quite a few other factors, especially the memory bandwidth of the card - the lower the memory bandwidth is, the lower the ability to get to the maximum fill rate.