GeForce GTS 150 vs Radeon R9 M275X

Intro

Compare those specs to the Radeon R9 M275X, which has core clock speeds of 900 MHz on the GPU, and 1125 MHz on the 2048 MB of GDDR5 memory. It features 640 SPUs along with 40 TAUs and 16 Rasterization Operator Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon R9 M275X		50 Watts
GeForce GTS 150		141 Watts
	Difference: 91 Watts (182%)

Memory Bandwidth

Theoretically speaking, the Radeon R9 M275X should be 125% quicker than the GeForce GTS 150 overall, because of its higher bandwidth. (explain)

Radeon R9 M275X		72000 MB/sec
GeForce GTS 150		32000 MB/sec
	Difference: 40000 (125%)

Texel Rate

The GeForce GTS 150 should be a lot (approximately 32%) better at texture filtering than the Radeon R9 M275X. (explain)

GeForce GTS 150		47360 Mtexels/sec
Radeon R9 M275X		36000 Mtexels/sec
	Difference: 11360 (32%)

Pixel Rate

The Radeon R9 M275X will be quite a bit (more or less 22%) more effective at anti-aliasing than the GeForce GTS 150, and should be capable of handling higher screen resolutions better. (explain)

Radeon R9 M275X		14400 Mpixels/sec
GeForce GTS 150		11840 Mpixels/sec
	Difference: 2560 (22%)

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 (measured in MB per second) that can be moved over the external memory interface in a second. The number is calculated by multiplying the card's interface width by its memory speed. If it uses DDR RAM, the result should be multiplied by 2 once again. If DDR5, multiply by 4 instead. The higher the memory bandwidth, the better 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 amount of texture map elements (texels) that can be applied in one second. This is calculated by multiplying the total amount 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 per second.

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics card can possibly write to the local memory in a second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the number of ROPs by the clock speed of the card. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel output rate is also dependant on many other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the ability to get to the maximum fill rate.