GeForce GTS 150 vs Radeon R9 270X

Intro

Compare that to the Radeon R9 270X, which features core speeds of 1000 MHz on the GPU, and 1400 MHz on the 2048 MB of GDDR5 memory. It features 1280 SPUs as well as 80 TAUs and 32 Rasterization Operator Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTS 150		141 Watts
Radeon R9 270X		180 Watts
	Difference: 39 Watts (28%)

Memory Bandwidth

Performance-wise, the Radeon R9 270X should in theory be much better than the GeForce GTS 150 overall. (explain)

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

Texel Rate

The Radeon R9 270X is a lot (more or less 69%) better at AF than the GeForce GTS 150. (explain)

Radeon R9 270X		80000 Mtexels/sec
GeForce GTS 150		47360 Mtexels/sec
	Difference: 32640 (69%)

Pixel Rate

If using high levels of AA is important to you, then the Radeon R9 270X is the winner, by a large margin. (explain)

Radeon R9 270X		32000 Mpixels/sec
GeForce GTS 150		11840 Mpixels/sec
	Difference: 20160 (170%)

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 (counted in MB per second) that can be moved past the external memory interface in a second. The number is worked out by multiplying the interface width by its memory speed. If it uses DDR memory, it must be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The better the card's memory bandwidth, the better the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and higher screen resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that are applied per second. This is worked out by multiplying the total number of texture units by the core speed of the chip. The better this number, the better the graphics 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 graphics card could possibly record to the local memory in a second - measured in millions of pixels per second. The number is calculated by multiplying the number of ROPs by the the core speed of the card. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel rate also depends on quite a few other factors, especially the memory bandwidth of the card - the lower the memory bandwidth is, the lower the ability to reach the max fill rate.