Radeon HD 7770 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 memory running at 1400 MHz through a 256-bit bus. It also is made up of 1280 SPUs, 80 TAUs, and 32 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 270		5943 points
Radeon HD 7770		3180 points
	Difference: 2763 (87%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 7770		80 Watts
Radeon R9 270		150 Watts
	Difference: 70 Watts (88%)

Memory Bandwidth

Theoretically speaking, the Radeon R9 270 should perform much faster than the Radeon HD 7770 overall. (explain)

Radeon R9 270		179200 MB/sec
Radeon HD 7770		72000 MB/sec
	Difference: 107200 (149%)

Texel Rate

The Radeon R9 270 is a lot (more or less 80%) more effective at AF than the Radeon HD 7770. (explain)

Radeon R9 270		72000 Mtexels/sec
Radeon HD 7770		40000 Mtexels/sec
	Difference: 32000 (80%)

Pixel Rate

The Radeon R9 270 should be much (more or less 80%) more effective at AA than the Radeon HD 7770, and will be capable of handling higher resolutions without slowing down too much. (explain)

Radeon R9 270		28800 Mpixels/sec
Radeon HD 7770		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: Memory bandwidth is the max amount of information (measured in MB per second) that can be moved past the external memory interface in a second. It is worked out by multiplying the bus width by the speed of its memory. If the card has DDR type memory, the result should be multiplied by 2 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 anti-aliasing, HDR and high resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that are processed per second. This figure is worked out by multiplying the total amount of texture units of the card by the core clock 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 per second.

Pixel Rate: Pixel rate is the most pixels that the graphics card could possibly write to the local memory in a second - measured in millions of pixels per second. The figure is calculated by multiplying the number of ROPs by the clock speed of the card. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel fill rate is also dependant on quite a few other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the potential to get to the max fill rate.