Radeon HD 6790 vs Radeon R9 270

Intro

Compare those specs to the Radeon R9 270, which features GPU core speed of 900 MHz, and 2048 MB of GDDR5 RAM set to run at 1400 MHz through a 256-bit bus. It also is made up of 1280 SPUs, 80 TAUs, and 32 ROPs.

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 270		5943 points
Radeon HD 6790		2150 points
	Difference: 3793 (176%)

Power Usage and Theoretical Benchmarks

Both cards have the same power consumption.

Memory Bandwidth

In theory, the Radeon R9 270 is 33% faster than the Radeon HD 6790 in general, because of its higher bandwidth. (explain)

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

Texel Rate

The Radeon R9 270 will be quite a bit (approximately 114%) faster with regards to texture filtering than the Radeon HD 6790. (explain)

Radeon R9 270		72000 Mtexels/sec
Radeon HD 6790		33600 Mtexels/sec
	Difference: 38400 (114%)

Pixel Rate

The Radeon R9 270 is a lot (about 114%) more effective at FSAA than the Radeon HD 6790, and should be able to handle higher resolutions without losing too much performance. (explain)

Radeon R9 270		28800 Mpixels/sec
Radeon HD 6790		13440 Mpixels/sec
	Difference: 15360 (114%)

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 max amount of data (counted in megabytes per second) that can be transferred across the external memory interface in a second. The number is calculated by multiplying the card's interface width by its memory speed. If it uses DDR type RAM, the result should be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The better the memory bandwidth, the better the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and high resolutions.

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

Pixel Rate: Pixel rate is the maximum number of pixels the graphics card can possibly record to the local memory in one second - measured in millions of pixels per second. The figure is worked out by multiplying the number of Raster Operations Pipelines by the the core 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 fill rate also depends on lots of other factors, especially the memory bandwidth of the card - the lower the memory bandwidth is, the lower the ability to reach the max fill rate.