Radeon HD 6790 vs Radeon R9 270

Intro

Compare all that to the Radeon R9 270, which has core speeds of 900 MHz on the GPU, and 1400 MHz on the 2048 MB of GDDR5 memory. It features 1280 SPUs as well as 80 Texture Address Units 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

The Radeon R9 270 should in theory be much faster than the Radeon HD 6790 overall. (explain)

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

Texel Rate

The Radeon R9 270 should be quite a bit (more or less 114%) faster with regards to AF 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 should be much (about 114%) more effective at full screen anti-aliasing than the Radeon HD 6790, and should be capable of handling higher screen resolutions more effectively. (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: Bandwidth is the maximum amount of information (counted in megabytes per second) that can be moved over the external memory interface within a second. It is worked out by multiplying the bus width by its memory clock speed. If the card has 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 faster 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 texture map elements (texels) that are applied in one second. This is calculated by multiplying the total number of texture units by the core clock speed of the chip. The higher the texel rate, the better the video card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed in a second.

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