Radeon HD 5750 512MB vs Radeon R9 390X 8G

Intro

Compare those specifications to the Radeon R9 390X 8G, which features clock speeds of 1050 MHz on the GPU, and 1500 MHz on the 8192 MB of GDDR5 RAM. It features 2816 SPUs along with 176 TAUs and 64 Rasterization Operator Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

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

Memory Bandwidth

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

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

Texel Rate

The Radeon R9 390X 8G should be much (approximately 633%) faster with regards to AF than the Radeon HD 5750 512MB. (explain)

Radeon R9 390X 8G		184800 Mtexels/sec
Radeon HD 5750 512MB		25200 Mtexels/sec
	Difference: 159600 (633%)

Pixel Rate

If using a high screen resolution is important to you, then the Radeon R9 390X 8G is superior to the Radeon HD 5750 512MB, and very much so. (explain)

Radeon R9 390X 8G		67200 Mpixels/sec
Radeon HD 5750 512MB		11200 Mpixels/sec
	Difference: 56000 (500%)

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 maximum amount of data (measured in megabytes per second) that can be transferred past the external memory interface within a second. The number is worked out by multiplying the bus width by its memory clock speed. If the card has DDR memory, it must be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The better the bandwidth is, 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 applied per second. This number is worked out by multiplying the total amount of texture units by the core clock speed of the chip. The better the texel rate, the better the card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed in one second.

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