GeForce GTX 465 vs Radeon R9 M395X

Intro

Compare that to the Radeon R9 M395X, which comes with a core clock frequency of 723 MHz and a GDDR5 memory speed of 1250 MHz. It also uses a 256-bit bus, and makes use of a 28 nm design. It is comprised of 2048 SPUs, 128 TAUs, and 32 Raster Operation Units.

Display Graphs

Hide Graphs

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

Theoretically speaking, the Radeon R9 M395X will be 56% faster than the GeForce GTX 465 overall, because of its higher bandwidth. (explain)

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

Texel Rate

The Radeon R9 M395X is quite a bit (more or less 247%) more effective at texture 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 a better choice, but only just. (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 maximum amount of information (measured in MB per second) that can be moved across the external memory interface within a second. It is calculated by multiplying the card's bus width by its memory clock speed. In the case of DDR type RAM, the result should be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The better the bandwidth is, 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 processed in one second. This number is calculated by multiplying the total number of texture units by the core clock speed of the chip. The higher this number, the better the card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied per second.

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics chip could possibly record to the local memory per second - measured in millions of pixels per second. The figure is worked out by multiplying the number of Raster Operations Pipelines by the the card's clock speed. 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 fill rate also depends on many other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the potential to get to the maximum fill rate.