Radeon HD 7770 vs Radeon RX Vega 64

Intro

Compare those specifications to the Radeon RX Vega 64, which has GPU core speed of 1247 MHz, and 8192 MB of HBM2 memory set to run at 1890 MHz through a 2048-bit bus. It also is made up of 4096 Stream Processors, 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 7770		3180 points
	Difference: 18806 (591%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 7770		80 Watts
Radeon RX Vega 64		295 Watts
	Difference: 215 Watts (269%)

Memory Bandwidth

Theoretically speaking, the Radeon RX Vega 64 should be a lot faster than the Radeon HD 7770 in general. (explain)

Radeon RX Vega 64		495411 MB/sec
Radeon HD 7770		72000 MB/sec
	Difference: 423411 (588%)

Texel Rate

The Radeon RX Vega 64 will be quite a bit (more or less 698%) faster with regards to AF than the Radeon HD 7770. (explain)

Radeon RX Vega 64		319232 Mtexels/sec
Radeon HD 7770		40000 Mtexels/sec
	Difference: 279232 (698%)

Pixel Rate

If using a high resolution is important to you, then the Radeon RX Vega 64 is the winner, by far. (explain)

Radeon RX Vega 64		79808 Mpixels/sec
Radeon HD 7770		16000 Mpixels/sec
	Difference: 63808 (399%)

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 (counted in megabytes per second) that can be transported over the external memory interface within a second. It's calculated by multiplying the interface width by the speed of its memory. If it uses DDR type memory, the result should be multiplied by 2 again. If DDR5, multiply by 4 instead. The higher the bandwidth is, the better the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and high resolutions.

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

Pixel Rate: Pixel rate is the most pixels that the graphics chip could possibly write to its local memory in a second - measured in millions of pixels per second. The figure is worked out by multiplying the amount of colour ROPs by the the core speed of the card. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel output 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.