Radeon HD 7770 vs Radeon R9 270X

Intro

Compare those specs to the Radeon R9 270X, which has core clock speeds of 1000 MHz on the GPU, and 1400 MHz on the 2048 MB of GDDR5 memory. It features 1280 SPUs along with 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 7770		3180 points
	Difference: 3410 (107%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 7770		80 Watts
Radeon R9 270X		180 Watts
	Difference: 100 Watts (125%)

Memory Bandwidth

The Radeon R9 270X should in theory be much faster than the Radeon HD 7770 in general. (explain)

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

Texel Rate

The Radeon R9 270X is a lot (approximately 100%) more effective at texture filtering than the Radeon HD 7770. (explain)

Radeon R9 270X		80000 Mtexels/sec
Radeon HD 7770		40000 Mtexels/sec
	Difference: 40000 (100%)

Pixel Rate

The Radeon R9 270X should be much (approximately 100%) more effective at anti-aliasing than the Radeon HD 7770, and also should be able to handle higher screen resolutions without losing too much performance. (explain)

Radeon R9 270X		32000 Mpixels/sec
Radeon HD 7770		16000 Mpixels/sec
	Difference: 16000 (100%)

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 maximum amount of data (measured in MB per second) that can be transported past the external memory interface in a second. It is calculated by multiplying the interface width by its memory clock speed. If it uses DDR type memory, it must be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The higher the memory bandwidth, the better the card will be in general. It especially helps with anti-aliasing, HDR and high resolutions.

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

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics card could possibly record to its local memory in a second - measured in millions of pixels per second. Pixel rate is worked out 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 rate also depends on lots of other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the potential to reach the maximum fill rate.