GeForce GTX 980M vs Radeon R9 M295X

Intro

Compare that to the Radeon R9 M295X, which has a clock frequency of 750 MHz and a GDDR5 memory frequency of 1375 MHz. It also uses a 256-bit bus, and makes use of a 28 nm design. It is made up of 2048 SPUs, 128 TAUs, and 32 Raster Operation Units.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 980M		100 Watts
Radeon R9 M295X		125 Watts
	Difference: 25 Watts (25%)

Memory Bandwidth

As far as performance goes, the Radeon R9 M295X should theoretically be quite a bit better than the GeForce GTX 980M in general. (explain)

Radeon R9 M295X		176000 MB/sec
GeForce GTX 980M		128000 MB/sec
	Difference: 48000 (38%)

Texel Rate

The GeForce GTX 980M should be a small bit (approximately 4%) better at AF than the Radeon R9 M295X. (explain)

GeForce GTX 980M		99648 Mtexels/sec
Radeon R9 M295X		96000 Mtexels/sec
	Difference: 3648 (4%)

Pixel Rate

If running with high levels of AA is important to you, then the GeForce GTX 980M is superior to the Radeon R9 M295X, by far. (explain)

GeForce GTX 980M		66432 Mpixels/sec
Radeon R9 M295X		24000 Mpixels/sec
	Difference: 42432 (177%)

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 largest amount of data (measured in MB per second) that can be transported across the external memory interface in one second. It is calculated by multiplying the bus width by its memory clock speed. If it uses DDR memory, the result should be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The better the card's memory bandwidth, the faster 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 texture map elements (texels) that are processed per second. This number is worked out by multiplying the total number of texture units of the card by the core clock speed of the chip. The higher the texel rate, the better the 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 the video card can possibly write to the local memory in a second - measured in millions of pixels per second. The figure is calculated by multiplying the number of Render Output Units by the the core speed of the card. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel rate is also dependant on many other factors, most notably the memory bandwidth of the card - the lower the memory bandwidth is, the lower the potential to reach the maximum fill rate.