Radeon HD 7770 vs Radeon RX Vega 64

Intro

Compare those specs to the Radeon RX Vega 64, which has a core clock speed of 1247 MHz and a HBM2 memory frequency of 1890 MHz. It also uses a 2048-bit bus, and makes use of a 14 nm design. It is made up of 4096 SPUs, 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

In theory, the Radeon RX Vega 64 is 588% quicker than the Radeon HD 7770 in general, due to its greater data rate. (explain)

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

Texel Rate

The Radeon RX Vega 64 is quite a bit (about 698%) more effective at 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: Bandwidth is the max amount of data (measured in MB per second) that can be transferred past the external memory interface within a second. It's calculated by multiplying the interface width by its memory speed. In the case of DDR RAM, it must be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The higher the memory bandwidth, the better 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 number of texture map elements (texels) that can be processed per second. This figure is worked out by multiplying the total 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 processed in one second.

Pixel Rate: Pixel rate is the most pixels the graphics card could possibly record to its local memory in a second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the amount of colour ROPs 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 output rate is also dependant on lots of other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the potential to get to the max fill rate.