Radeon HD 7950 3GB vs Radeon RX Vega 64

Intro

Compare that to the Radeon RX Vega 64, which has a GPU core clock speed of 1247 MHz, and 8192 MB of HBM2 memory running at 1890 MHz through a 2048-bit bus. It also features 4096 SPUs, 256 TAUs, and 64 Raster Operation Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 7950 3GB		200 Watts
Radeon RX Vega 64		295 Watts
	Difference: 95 Watts (48%)

Memory Bandwidth

In theory, the Radeon RX Vega 64 should be 106% faster than the Radeon HD 7950 3GB overall, because of its greater data rate. (explain)

Radeon RX Vega 64		495411 MB/sec
Radeon HD 7950 3GB		240000 MB/sec
	Difference: 255411 (106%)

Texel Rate

The Radeon RX Vega 64 is quite a bit (about 256%) faster with regards to anisotropic filtering than the Radeon HD 7950 3GB. (explain)

Radeon RX Vega 64		319232 Mtexels/sec
Radeon HD 7950 3GB		89600 Mtexels/sec
	Difference: 229632 (256%)

Pixel Rate

If running with a high resolution is important to you, then the Radeon RX Vega 64 is superior to the Radeon HD 7950 3GB, by far. (explain)

Radeon RX Vega 64		79808 Mpixels/sec
Radeon HD 7950 3GB		25600 Mpixels/sec
	Difference: 54208 (212%)

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 maximum amount of information (measured in MB per second) that can be transferred across the external memory interface in one second. It is worked out by multiplying the bus width by its memory clock speed. If the card has DDR memory, it should be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The higher the memory bandwidth, 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 are applied per second. This figure is worked out by multiplying the total texture units of the card 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 processed per second.

Pixel Rate: Pixel rate is the maximum amount of pixels the graphics card could possibly write to the local memory in one second - measured in millions of pixels per second. The number is calculated by multiplying the amount of ROPs by the the core speed of the card. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel fill rate is also dependant on many other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the potential to reach the maximum fill rate.