Radeon HD 7790 vs Radeon R9 270

Intro

Compare all that to the Radeon R9 270, which features a GPU core clock speed of 900 MHz, and 2048 MB of GDDR5 memory set to run at 1400 MHz through a 256-bit bus. It also is comprised of 1280 Stream Processors, 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 7790		4330 points
	Difference: 1613 (37%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 7790		85 Watts
Radeon R9 270		150 Watts
	Difference: 65 Watts (76%)

Memory Bandwidth

The Radeon R9 270 should theoretically be quite a bit faster than the Radeon HD 7790 overall. (explain)

Radeon R9 270		179200 MB/sec
Radeon HD 7790		96000 MB/sec
	Difference: 83200 (87%)

Texel Rate

The Radeon R9 270 should be a lot (more or less 29%) faster with regards to anisotropic filtering than the Radeon HD 7790. (explain)

Radeon R9 270		72000 Mtexels/sec
Radeon HD 7790		56000 Mtexels/sec
	Difference: 16000 (29%)

Pixel Rate

The Radeon R9 270 should be a lot (more or less 80%) more effective at FSAA than the Radeon HD 7790, and should be capable of handling higher screen resolutions without slowing down too much. (explain)

Radeon R9 270		28800 Mpixels/sec
Radeon HD 7790		16000 Mpixels/sec
	Difference: 12800 (80%)

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 max amount of information (in units of MB per second) that can be moved over the external memory interface within a second. It's calculated by multiplying the interface width by its memory speed. In the case of DDR type memory, it must be multiplied by 2 again. If DDR5, multiply by 4 instead. The higher the card's memory bandwidth, the faster the card will be in general. It especially helps with anti-aliasing, HDR and higher screen resolutions.

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

Pixel Rate: Pixel rate is the maximum amount of pixels the video card could possibly write to its local memory in one second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the amount of Render Output Units by the clock speed of the card. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel rate also depends on quite a few other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the ability to reach the maximum fill rate.