GeForce GTX 465 vs Radeon R9 M395X

Intro

Compare those specifications to the Radeon R9 M395X, which features a GPU core clock speed of 723 MHz, and 4096 MB of GDDR5 memory set to run at 1250 MHz through a 256-bit bus. It also is comprised of 2048 Stream Processors, 128 TAUs, and 32 Raster Operation Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon R9 M395X		125 Watts
GeForce GTX 465		200 Watts
	Difference: 75 Watts (60%)

Memory Bandwidth

In theory, the Radeon R9 M395X is 56% quicker than the GeForce GTX 465 in general, because of its greater data rate. (explain)

Radeon R9 M395X		160000 MB/sec
GeForce GTX 465		102592 MB/sec
	Difference: 57408 (56%)

Texel Rate

The Radeon R9 M395X is a lot (about 247%) more effective at anisotropic filtering than the GeForce GTX 465. (explain)

Radeon R9 M395X		92544 Mtexels/sec
GeForce GTX 465		26708 Mtexels/sec
	Difference: 65836 (247%)

Pixel Rate

If using a high screen resolution is important to you, then the Radeon R9 M395X is the winner, but it probably won't make a huge difference. (explain)

Radeon R9 M395X		23136 Mpixels/sec
GeForce GTX 465		19424 Mpixels/sec
	Difference: 3712 (19%)

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 (in units of MB per second) that can be transported across the external memory interface in a second. It's worked out by multiplying the bus width by its memory clock speed. If the card has DDR type memory, it must be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The higher the bandwidth is, the better the card will be in general. It especially helps with AA, HDR and higher screen resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that can be processed per second. This is calculated by multiplying the total amount 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 processed in one second.

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