GeForce GTX 660 Ti vs Radeon R9 270

Intro

Compare those specifications to the Radeon R9 270, which comes with GPU clock speed of 900 MHz, and 2048 MB of GDDR5 RAM running at 1400 MHz through a 256-bit bus. It also is comprised of 1280 SPUs, 80 Texture Address Units, 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

GeForce GTX 660 Ti		6013 points
Radeon R9 270		5943 points
	Difference: 70 (1%)

Power Usage and Theoretical Benchmarks

Both cards have the same power consumption.

Memory Bandwidth

In theory, the Radeon R9 270 should be 24% faster than the GeForce GTX 660 Ti in general, because of its higher bandwidth. (explain)

Radeon R9 270		179200 MB/sec
GeForce GTX 660 Ti		144000 MB/sec
	Difference: 35200 (24%)

Texel Rate

The GeForce GTX 660 Ti will be much (about 42%) faster with regards to anisotropic filtering than the Radeon R9 270. (explain)

GeForce GTX 660 Ti		102480 Mtexels/sec
Radeon R9 270		72000 Mtexels/sec
	Difference: 30480 (42%)

Pixel Rate

The Radeon R9 270 is a lot (approximately 31%) more effective at full screen anti-aliasing than the GeForce GTX 660 Ti, and also will be capable of handling higher resolutions while still performing well. (explain)

Radeon R9 270		28800 Mpixels/sec
GeForce GTX 660 Ti		21960 Mpixels/sec
	Difference: 6840 (31%)

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 largest amount of data (in units of megabytes per second) that can be moved across the external memory interface in a second. The number is worked out by multiplying the card's interface width by its memory clock speed. If it uses DDR memory, it should be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The better the card's memory bandwidth, the faster the card will be in general. It especially helps with AA, HDR and higher screen resolutions.

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

Pixel Rate: Pixel rate is the most pixels the video card can possibly record to the local memory per second - measured in millions of pixels per second. The figure is worked out by multiplying the number of Raster Operations Pipelines by the the core speed of the card. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel output rate also depends on quite a few other factors, most notably the memory bandwidth of the card - the lower the memory bandwidth is, the lower the ability to get to the maximum fill rate.