Geforce GTX 780 vs Radeon R9 M295X

Intro

Compare that to the Radeon R9 M295X, which comes with a core clock speed of 750 MHz and a GDDR5 memory frequency of 1375 MHz. It also makes use of a 256-bit memory 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 M295X		125 Watts
Geforce GTX 780		250 Watts
	Difference: 125 Watts (100%)

Memory Bandwidth

Performance-wise, the Geforce GTX 780 should in theory be a lot superior to the Radeon R9 M295X overall. (explain)

Geforce GTX 780		288384 MB/sec
Radeon R9 M295X		176000 MB/sec
	Difference: 112384 (64%)

Texel Rate

The Geforce GTX 780 is a lot (more or less 73%) more effective at AF than the Radeon R9 M295X. (explain)

Geforce GTX 780		165696 Mtexels/sec
Radeon R9 M295X		96000 Mtexels/sec
	Difference: 69696 (73%)

Pixel Rate

If using lots of anti-aliasing is important to you, then the Geforce GTX 780 is superior to the Radeon R9 M295X, and very much so. (explain)

Geforce GTX 780		41424 Mpixels/sec
Radeon R9 M295X		24000 Mpixels/sec
	Difference: 17424 (73%)

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 max amount of data (counted in megabytes per second) that can be transferred over the external memory interface in one second. It is worked out by multiplying the bus width by its memory clock speed. If the card has DDR RAM, it must be multiplied by 2 once again. If DDR5, multiply by 4 instead. The better the card's memory bandwidth, the better 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 number of texture map elements (texels) that can be processed in one second. This figure is calculated by multiplying the total number of texture units by the core clock speed of the chip. The higher the texel rate, the better the graphics card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels per second.

Pixel Rate: Pixel rate is the most pixels that the graphics card could possibly record to its local memory per second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the number of ROPs by the clock speed of the card. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel rate also depends on lots of other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the potential to reach the maximum fill rate.