GeForce GTS 250 512MB vs Radeon R9 M365X

Intro

Compare those specs to the Radeon R9 M365X, which features core speeds of 925 MHz on the GPU, and 1125 MHz on the 4096 MB of GDDR5 memory. It features 640 SPUs as well as 40 Texture Address Units and 16 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Memory Bandwidth

In theory, the Radeon R9 M365X should be 2% quicker than the GeForce GTS 250 512MB in general, due to its higher data rate. (explain)

Radeon R9 M365X		72000 MB/sec
GeForce GTS 250 512MB		70400 MB/sec
	Difference: 1600 (2%)

Texel Rate

The GeForce GTS 250 512MB will be much (approximately 28%) more effective at anisotropic filtering than the Radeon R9 M365X. (explain)

GeForce GTS 250 512MB		47232 Mtexels/sec
Radeon R9 M365X		37000 Mtexels/sec
	Difference: 10232 (28%)

Pixel Rate

The Radeon R9 M365X is quite a bit (approximately 25%) more effective at anti-aliasing than the GeForce GTS 250 512MB, and also able to handle higher screen resolutions while still performing well. (explain)

Radeon R9 M365X		14800 Mpixels/sec
GeForce GTS 250 512MB		11808 Mpixels/sec
	Difference: 2992 (25%)

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 data (measured in megabytes per second) that can be moved across the external memory interface within a second. It's calculated by multiplying the card's interface width by the speed of its memory. If the card has DDR RAM, it must be multiplied by 2 once again. If DDR5, multiply by 4 instead. The better the memory bandwidth, the faster the card will be in general. It especially helps with anti-aliasing, HDR and high resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that are processed per second. This is calculated by multiplying the total amount of texture units by the core clock speed of the chip. The better the texel rate, the better the video 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 video card could possibly record to the local memory in a second - measured in millions of pixels per second. The figure is calculated by multiplying the number of Render Output Units by the clock speed of the card. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel rate is also dependant on lots of other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the ability to get to the max fill rate.