Radeon HD 6790 vs Radeon R9 270X

Intro

Compare those specifications to the Radeon R9 270X, which comes with core speeds of 1000 MHz on the GPU, and 1400 MHz on the 2048 MB of GDDR5 memory. It features 1280 SPUs as well as 80 TAUs and 32 Rasterization Operator 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 270X		6590 points
Radeon HD 6790		2150 points
	Difference: 4440 (207%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 6790		150 Watts
Radeon R9 270X		180 Watts
	Difference: 30 Watts (20%)

Memory Bandwidth

Theoretically speaking, the Radeon R9 270X is 33% faster than the Radeon HD 6790 in general, because of its greater data rate. (explain)

Radeon R9 270X		179200 MB/sec
Radeon HD 6790		134400 MB/sec
	Difference: 44800 (33%)

Texel Rate

The Radeon R9 270X is quite a bit (approximately 138%) better at AF than the Radeon HD 6790. (explain)

Radeon R9 270X		80000 Mtexels/sec
Radeon HD 6790		33600 Mtexels/sec
	Difference: 46400 (138%)

Pixel Rate

The Radeon R9 270X should be much (more or less 138%) more effective at AA than the Radeon HD 6790, and also will be capable of handling higher screen resolutions without slowing down too much. (explain)

Radeon R9 270X		32000 Mpixels/sec
Radeon HD 6790		13440 Mpixels/sec
	Difference: 18560 (138%)

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 (counted in megabytes per second) that can be transferred past the external memory interface in one second. It is worked out by multiplying the card's bus width by its memory speed. In the case of DDR type memory, it must be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. The better the card's memory bandwidth, the faster the card will be in general. It especially helps with AA, HDR and high resolutions.

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

Pixel Rate: Pixel rate is the most pixels the video card could possibly write to the local memory in one second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the amount of colour ROPs by the clock speed of the card. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel output rate is also dependant on lots of other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the potential to get to the max fill rate.