GeForce GTS 150 vs Radeon R9 270

Intro

Compare those specifications to the Radeon R9 270, which features a clock frequency of 900 MHz and a GDDR5 memory frequency of 1400 MHz. It also uses a 256-bit memory bus, and uses a 28 nm design. It is comprised of 1280 SPUs, 80 TAUs, and 32 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTS 150		141 Watts
Radeon R9 270		150 Watts
	Difference: 9 Watts (6%)

Memory Bandwidth

In theory, the Radeon R9 270 should be quite a bit faster than the GeForce GTS 150 overall. (explain)

Radeon R9 270		179200 MB/sec
GeForce GTS 150		32000 MB/sec
	Difference: 147200 (460%)

Texel Rate

The Radeon R9 270 will be quite a bit (more or less 52%) faster with regards to anisotropic filtering than the GeForce GTS 150. (explain)

Radeon R9 270		72000 Mtexels/sec
GeForce GTS 150		47360 Mtexels/sec
	Difference: 24640 (52%)

Pixel Rate

The Radeon R9 270 will be quite a bit (about 143%) faster with regards to FSAA than the GeForce GTS 150, and able to handle higher screen resolutions without slowing down too much. (explain)

Radeon R9 270		28800 Mpixels/sec
GeForce GTS 150		11840 Mpixels/sec
	Difference: 16960 (143%)

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 (counted in MB per second) that can be moved past the external memory interface within a second. The number is worked out by multiplying the card's interface width by its memory speed. If the card has DDR type memory, the result should be multiplied by 2 again. If DDR5, multiply by 4 instead. The better the card's memory bandwidth, the better the card will be in general. It especially helps with AA, HDR and higher screen resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that are applied per second. This number is calculated by multiplying the total amount of texture units 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 processed per second.

Pixel Rate: Pixel rate is the most pixels that the graphics chip can possibly record to its local memory per second - measured in millions of pixels per second. The number is calculated by multiplying the number of colour ROPs by the the core speed of the card. 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 quite a few other factors, most notably the memory bandwidth of the card - the lower the bandwidth is, the lower the potential to reach the max fill rate.