GeForce GTX 780 Ti vs Radeon R9 M385X

Intro

Compare all of that to the Radeon R9 M385X, which features a clock speed of 1100 MHz and a GDDR5 memory frequency of 1500 MHz. It also features a 128-bit bus, and uses a 28 nm design. It is comprised of 896 SPUs, 56 TAUs, and 16 ROPs.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Memory Bandwidth

Theoretically speaking, the GeForce GTX 780 Ti will be 250% quicker than the Radeon R9 M385X in general, because of its higher data rate. (explain)

GeForce GTX 780 Ti		336000 MB/sec
Radeon R9 M385X		96000 MB/sec
	Difference: 240000 (250%)

Texel Rate

The GeForce GTX 780 Ti will be quite a bit (more or less 241%) more effective at AF than the Radeon R9 M385X. (explain)

GeForce GTX 780 Ti		210000 Mtexels/sec
Radeon R9 M385X		61600 Mtexels/sec
	Difference: 148400 (241%)

Pixel Rate

If using high levels of AA is important to you, then the GeForce GTX 780 Ti is the winner, and very much so. (explain)

GeForce GTX 780 Ti		42000 Mpixels/sec
Radeon R9 M385X		17600 Mpixels/sec
	Difference: 24400 (139%)

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 largest amount of data (in units of megabytes per second) that can be transported past the external memory interface within a second. The number is worked out by multiplying the bus width by the speed of its memory. If the card has DDR type RAM, it should be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The better the bandwidth is, the faster 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 amount of texture map elements (texels) that can be applied in one second. This figure is worked out by multiplying the total amount of texture units of the card by the core clock speed of the chip. The higher this number, the better the card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed in a second.

Pixel Rate: Pixel rate is the maximum amount of pixels the video card can possibly record to its local memory per second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the amount of colour ROPs by the the core speed of the card. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel fill rate also depends on quite a few other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the potential to get to the maximum fill rate.