Radeon HD 5750 512MB vs Radeon R9 390 8G

Intro

Compare those specifications to the Radeon R9 390 8G, which features a clock frequency of 1000 MHz and a GDDR5 memory speed of 1500 MHz. It also makes use of a 512-bit memory bus, and uses a 28 nm design. It is comprised of 2560 SPUs, 160 Texture Address Units, and 64 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 5750 512MB		86 Watts
Radeon R9 390 8G		275 Watts
	Difference: 189 Watts (220%)

Memory Bandwidth

Performance-wise, the Radeon R9 390 8G should in theory be quite a bit better than the Radeon HD 5750 512MB overall. (explain)

Radeon R9 390 8G		384000 MB/sec
Radeon HD 5750 512MB		73600 MB/sec
	Difference: 310400 (422%)

Texel Rate

The Radeon R9 390 8G is much (approximately 535%) better at AF than the Radeon HD 5750 512MB. (explain)

Radeon R9 390 8G		160000 Mtexels/sec
Radeon HD 5750 512MB		25200 Mtexels/sec
	Difference: 134800 (535%)

Pixel Rate

The Radeon R9 390 8G is much (about 471%) more effective at anti-aliasing than the Radeon HD 5750 512MB, and also will be able to handle higher screen resolutions without slowing down too much. (explain)

Radeon R9 390 8G		64000 Mpixels/sec
Radeon HD 5750 512MB		11200 Mpixels/sec
	Difference: 52800 (471%)

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 information (measured in megabytes per second) that can be transferred across the external memory interface in a second. It's worked out by multiplying the card's bus width by its memory speed. In the case of DDR type RAM, the result should be multiplied by 2 once again. If 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 higher screen resolutions.

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

Pixel Rate: Pixel rate is the most pixels the video card can possibly write to its local memory per second - measured in millions of pixels per second. The figure is calculated by multiplying the number of Raster Operations Pipelines by the the card's clock speed. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel output rate also depends on quite a few other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the ability to get to the maximum fill rate.