GeForce GTS 150 vs Radeon R7 250X 2GB

Intro

Compare those specs to the Radeon R7 250X 2GB, which makes use of a 28 nm design. AMD has set the core frequency at 1000 MHz. The GDDR5 RAM works at a speed of 1125 MHz on this specific model. It features 640 SPUs as well as 40 Texture Address Units and 16 Rasterization Operator Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon R7 250X 2GB		95 Watts
GeForce GTS 150		141 Watts
	Difference: 46 Watts (48%)

Memory Bandwidth

The Radeon R7 250X 2GB should theoretically be quite a bit faster than the GeForce GTS 150 in general. (explain)

Radeon R7 250X 2GB		72000 MB/sec
GeForce GTS 150		32000 MB/sec
	Difference: 40000 (125%)

Texel Rate

The GeForce GTS 150 is just a bit (about 18%) faster with regards to texture filtering than the Radeon R7 250X 2GB. (explain)

GeForce GTS 150		47360 Mtexels/sec
Radeon R7 250X 2GB		40000 Mtexels/sec
	Difference: 7360 (18%)

Pixel Rate

The Radeon R7 250X 2GB will be a lot (approximately 35%) faster with regards to anti-aliasing than the GeForce GTS 150, and also capable of handling higher resolutions while still performing well. (explain)

Radeon R7 250X 2GB		16000 Mpixels/sec
GeForce GTS 150		11840 Mpixels/sec
	Difference: 4160 (35%)

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: Bandwidth is the maximum amount of information (counted in megabytes per second) that can be transported past the external memory interface in a second. It's calculated by multiplying the card's interface width by the speed of its memory. If the card has DDR memory, it must be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. The better the bandwidth is, the faster the card will be in general. It especially helps with AA, High Dynamic Range and high resolutions.

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

Pixel Rate: Pixel rate is the maximum number of pixels the graphics card can possibly write to its local memory per second - measured in millions of pixels per second. The figure is worked out by multiplying the number of ROPs by the the card's 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 rate also depends on many other factors, especially the memory bandwidth of the card - the lower the bandwidth is, the lower the ability to get to the maximum fill rate.