Radeon HD 7770 vs Radeon R9 270X

Intro

Compare those specifications to the Radeon R9 270X, which features a clock speed of 1000 MHz and a GDDR5 memory frequency of 1400 MHz. It also uses a 256-bit memory bus, and makes use of a 28 nm design. It features 1280 SPUs, 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 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

Theoretically speaking, the Radeon R9 270X should 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 will be a lot (more or less 100%) more effective at AF 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%) better at anti-aliasing than the Radeon HD 7770, and will be able to handle higher screen resolutions more effectively. (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: Bandwidth is the maximum amount of data (in units of MB per second) that can be moved past the external memory interface in one second. The number is calculated by multiplying the bus width by its memory clock speed. In the case of DDR RAM, it must be multiplied by 2 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 AA, HDR and high resolutions.

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

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics chip can possibly write to its local memory in a second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the number of Raster Operations Pipelines by the the core clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel fill rate also depends on lots of other factors, especially the memory bandwidth of the card - the lower the bandwidth is, the lower the potential to reach the max fill rate.