GeForce GTS 250 512MB vs Radeon R9 M395X

Intro

Compare that to the Radeon R9 M395X, which comes with core clock speeds of 723 MHz on the GPU, and 1250 MHz on the 4096 MB of GDDR5 memory. It features 2048 SPUs as well as 128 Texture Address Units and 32 Rasterization Operator Units.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon R9 M395X		125 Watts
GeForce GTS 250 512MB		145 Watts
	Difference: 20 Watts (16%)

Memory Bandwidth

As far as performance goes, the Radeon R9 M395X should in theory be quite a bit superior to the GeForce GTS 250 512MB overall. (explain)

Radeon R9 M395X		160000 MB/sec
GeForce GTS 250 512MB		70400 MB/sec
	Difference: 89600 (127%)

Texel Rate

The Radeon R9 M395X should be a lot (approximately 96%) faster with regards to texture filtering than the GeForce GTS 250 512MB. (explain)

Radeon R9 M395X		92544 Mtexels/sec
GeForce GTS 250 512MB		47232 Mtexels/sec
	Difference: 45312 (96%)

Pixel Rate

The Radeon R9 M395X should be quite a bit (approximately 96%) more effective at AA than the GeForce GTS 250 512MB, and also able to handle higher resolutions more effectively. (explain)

Radeon R9 M395X		23136 Mpixels/sec
GeForce GTS 250 512MB		11808 Mpixels/sec
	Difference: 11328 (96%)

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 max amount of information (measured in megabytes per second) that can be moved over the external memory interface in one second. It's calculated by multiplying the bus width by the speed of its memory. If it uses DDR RAM, it should be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The better 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 number of texture map elements (texels) that can be applied in one second. This is calculated by multiplying the total number of texture units of the card by the core speed of the chip. The better this number, 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 maximum amount of pixels the video card could possibly write to the local memory in a second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the amount of ROPs by the clock speed of the card. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel rate is also dependant on many other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the ability to get to the max fill rate.