Radeon HD 6570 (OEM) 2GB vs Radeon R9 390X 8G

Intro

Compare that to the Radeon R9 390X 8G, which features GPU clock speed of 1050 MHz, and 8192 MB of GDDR5 RAM running at 1500 MHz through a 512-bit bus. It also is made up of 2816 Stream Processors, 176 Texture Address Units, and 64 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 6570 (OEM) 2GB		50 Watts
Radeon R9 390X 8G		275 Watts
	Difference: 225 Watts (450%)

Memory Bandwidth

As far as performance goes, the Radeon R9 390X 8G should in theory be quite a bit superior to the Radeon HD 6570 (OEM) 2GB overall. (explain)

Radeon R9 390X 8G		384000 MB/sec
Radeon HD 6570 (OEM) 2GB		64000 MB/sec
	Difference: 320000 (500%)

Texel Rate

The Radeon R9 390X 8G will be quite a bit (about 1085%) more effective at AF than the Radeon HD 6570 (OEM) 2GB. (explain)

Radeon R9 390X 8G		184800 Mtexels/sec
Radeon HD 6570 (OEM) 2GB		15600 Mtexels/sec
	Difference: 169200 (1085%)

Pixel Rate

The Radeon R9 390X 8G should be a lot (more or less 1192%) better at full screen anti-aliasing than the Radeon HD 6570 (OEM) 2GB, and also should be capable of handling higher resolutions without slowing down too much. (explain)

Radeon R9 390X 8G		67200 Mpixels/sec
Radeon HD 6570 (OEM) 2GB		5200 Mpixels/sec
	Difference: 62000 (1192%)

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 information (counted in MB per second) that can be transported across the external memory interface within a second. The number is worked out by multiplying the card's 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 ANOTHER 2x. The higher the bandwidth is, the better the card will be in general. It especially helps with AA, HDR and higher screen resolutions.

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

Pixel Rate: Pixel rate is the most pixels the graphics card can possibly write to the local memory in a second - measured in millions of pixels per second. The number is worked out by multiplying the amount of Render Output Units by the the core clock speed. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel output rate is also dependant on many other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the potential to reach the max fill rate.