GeForce GT 240 GDDR5 vs Radeon R9 M395X

Intro

Compare all that to the Radeon R9 M395X, which has 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

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GT 240 GDDR5		70 Watts
Radeon R9 M395X		125 Watts
	Difference: 55 Watts (79%)

Memory Bandwidth

Theoretically speaking, the Radeon R9 M395X should be quite a bit faster than the GeForce GT 240 GDDR5 in general. (explain)

Radeon R9 M395X		160000 MB/sec
GeForce GT 240 GDDR5		54400 MB/sec
	Difference: 105600 (194%)

Texel Rate

The Radeon R9 M395X should be much (more or less 426%) better at AF than the GeForce GT 240 GDDR5. (explain)

Radeon R9 M395X		92544 Mtexels/sec
GeForce GT 240 GDDR5		17600 Mtexels/sec
	Difference: 74944 (426%)

Pixel Rate

The Radeon R9 M395X should be a lot (approximately 426%) better at AA than the GeForce GT 240 GDDR5, and also able to handle higher screen resolutions without losing too much performance. (explain)

Radeon R9 M395X		23136 Mpixels/sec
GeForce GT 240 GDDR5		4400 Mpixels/sec
	Difference: 18736 (426%)

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 largest amount of information (measured in megabytes per second) that can be transported across the external memory interface within a second. It is calculated by multiplying the card's bus width by the speed of its memory. If the card has DDR type RAM, the result should be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The higher the bandwidth is, the faster the card will be in general. It especially helps with AA, High Dynamic Range and higher screen resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that can be applied per second. This is worked out by multiplying the total number of texture units 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 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. The figure is calculated by multiplying the number of colour ROPs by the the core clock speed. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel rate is also dependant on many other factors, most notably the memory bandwidth of the card - the lower the bandwidth is, the lower the potential to get to the maximum fill rate.