Radeon HD 7750 vs Radeon R9 390 8G

Intro

Compare all of that to the Radeon R9 390 8G, which comes with a core clock frequency of 1000 MHz and a GDDR5 memory frequency of 1500 MHz. It also uses a 512-bit bus, and uses a 28 nm design. It is comprised of 2560 SPUs, 160 TAUs, and 64 Raster Operation Units.

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 R9 390 8G		12733 points
Radeon HD 7750		2240 points
	Difference: 10493 (468%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 7750		55 Watts
Radeon R9 390 8G		275 Watts
	Difference: 220 Watts (400%)

Memory Bandwidth

As far as performance goes, the Radeon R9 390 8G should theoretically be much superior to the Radeon HD 7750 overall. (explain)

Radeon R9 390 8G		384000 MB/sec
Radeon HD 7750		72000 MB/sec
	Difference: 312000 (433%)

Texel Rate

The Radeon R9 390 8G will be quite a bit (approximately 525%) better at texture filtering than the Radeon HD 7750. (explain)

Radeon R9 390 8G		160000 Mtexels/sec
Radeon HD 7750		25600 Mtexels/sec
	Difference: 134400 (525%)

Pixel Rate

If using a high resolution is important to you, then the Radeon R9 390 8G is the winner, by a large margin. (explain)

Radeon R9 390 8G		64000 Mpixels/sec
Radeon HD 7750		12800 Mpixels/sec
	Difference: 51200 (400%)

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 largest amount of information (measured in megabytes per second) that can be transferred across the external memory interface in one second. It's worked out by multiplying the bus width by its memory speed. If it uses DDR memory, the result should be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The better the card's 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 amount of texture map elements (texels) that can be processed per second. This number is calculated by multiplying the total number 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 applied in a second.

Pixel Rate: Pixel rate is the most pixels the video card could possibly write to the local memory per second - measured in millions of pixels per second. The figure 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 filling the screen with pixels (the image). The actual pixel output rate is also dependant on lots of other factors, most notably the memory bandwidth of the card - the lower the bandwidth is, the lower the ability to reach the maximum fill rate.