GeForce GTX 780 Ti vs Radeon R9 M395X

Intro

Compare all of that to the Radeon R9 M395X, which has a core clock frequency of 723 MHz and a GDDR5 memory speed of 1250 MHz. It also makes use of a 256-bit bus, and uses a 28 nm design. It is comprised of 2048 SPUs, 128 Texture Address Units, 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 780 Ti		250 Watts
	Difference: 125 Watts (100%)

Memory Bandwidth

In theory, the GeForce GTX 780 Ti will be 110% faster than the Radeon R9 M395X overall, due to its greater bandwidth. (explain)

GeForce GTX 780 Ti		336000 MB/sec
Radeon R9 M395X		160000 MB/sec
	Difference: 176000 (110%)

Texel Rate

The GeForce GTX 780 Ti should be quite a bit (about 127%) faster with regards to texture filtering than the Radeon R9 M395X. (explain)

GeForce GTX 780 Ti		210000 Mtexels/sec
Radeon R9 M395X		92544 Mtexels/sec
	Difference: 117456 (127%)

Pixel Rate

The GeForce GTX 780 Ti should be quite a bit (approximately 82%) faster with regards to anti-aliasing than the Radeon R9 M395X, and will be capable of handling higher screen resolutions better. (explain)

GeForce GTX 780 Ti		42000 Mpixels/sec
Radeon R9 M395X		23136 Mpixels/sec
	Difference: 18864 (82%)

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 (counted in MB per second) that can be transported across the external memory interface in a second. It is calculated by multiplying the bus width by its memory clock speed. In the case of DDR RAM, the result should be multiplied by 2 again. If DDR5, multiply by 4 instead. The better the memory bandwidth, the faster the card will be in general. It especially helps with AA, HDR and high resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that can be processed per second. This is worked out by multiplying the total number 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 maximum number of pixels the graphics card can possibly record to the local memory in a second - measured in millions of pixels per second. The number is calculated by multiplying the number of colour ROPs by the the card's clock speed. 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 output rate also depends on quite a few other factors, most notably the memory bandwidth of the card - the lower the bandwidth is, the lower the ability to get to the maximum fill rate.