GeForce GTS 150 vs Radeon R9 M390X

Intro

Compare those specs to the Radeon R9 M390X, which makes use of a 28 nm design. AMD has clocked the core speed at 723 MHz. The GDDR5 memory runs at a frequency of 1250 MHz on this specific card. It features 2048 SPUs along with 128 Texture Address Units and 32 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon R9 M390X		125 Watts
GeForce GTS 150		141 Watts
	Difference: 16 Watts (13%)

Memory Bandwidth

As far as performance goes, the Radeon R9 M390X should theoretically be a lot superior to the GeForce GTS 150 overall. (explain)

Radeon R9 M390X		160000 MB/sec
GeForce GTS 150		32000 MB/sec
	Difference: 128000 (400%)

Texel Rate

The Radeon R9 M390X is much (approximately 95%) better at texture filtering than the GeForce GTS 150. (explain)

Radeon R9 M390X		92544 Mtexels/sec
GeForce GTS 150		47360 Mtexels/sec
	Difference: 45184 (95%)

Pixel Rate

The Radeon R9 M390X should be a lot (more or less 95%) better at full screen anti-aliasing than the GeForce GTS 150, and should be able to handle higher screen resolutions more effectively. (explain)

Radeon R9 M390X		23136 Mpixels/sec
GeForce GTS 150		11840 Mpixels/sec
	Difference: 11296 (95%)

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

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

Pixel Rate: Pixel rate is the maximum amount of pixels the video card can possibly record to its local memory in one second - measured in millions of pixels per second. The number is worked out by multiplying the number of Raster Operations Pipelines by the clock speed of the card. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel rate is also dependant on lots of other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the potential to get to the maximum fill rate.