GeForce GTS 150 vs Radeon R9 M295X

Intro

Compare those specifications to the Radeon R9 M295X, which comes with a GPU core clock speed of 750 MHz, and 4096 MB of GDDR5 memory running at 1375 MHz through a 256-bit bus. It also features 2048 Stream Processors, 128 Texture Address Units, and 32 Raster Operation Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon R9 M295X		125 Watts
GeForce GTS 150		141 Watts
	Difference: 16 Watts (13%)

Memory Bandwidth

As far as performance goes, the Radeon R9 M295X should theoretically be a lot superior to the GeForce GTS 150 overall. (explain)

Radeon R9 M295X		176000 MB/sec
GeForce GTS 150		32000 MB/sec
	Difference: 144000 (450%)

Texel Rate

The Radeon R9 M295X will be a lot (about 103%) more effective at AF than the GeForce GTS 150. (explain)

Radeon R9 M295X		96000 Mtexels/sec
GeForce GTS 150		47360 Mtexels/sec
	Difference: 48640 (103%)

Pixel Rate

The Radeon R9 M295X will be quite a bit (approximately 103%) more effective at anti-aliasing than the GeForce GTS 150, and also should be capable of handling higher resolutions better. (explain)

Radeon R9 M295X		24000 Mpixels/sec
GeForce GTS 150		11840 Mpixels/sec
	Difference: 12160 (103%)

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 information (counted in MB per second) that can be transported past the external memory interface within a second. The number is worked out by multiplying the interface width by the speed of its memory. If the card has DDR RAM, the result should be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The better 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 amount of texture map elements (texels) that can be processed in one second. This figure is worked out by multiplying the total amount of texture units by the core clock speed of the chip. The better this number, the better the card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels in a second.

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