GeForce GTX 660 Ti vs Radeon R9 M295X

Intro

Compare all of that to the Radeon R9 M295X, which uses a 28 nm design. AMD has set the core speed at 750 MHz. The GDDR5 RAM is set to run at a speed of 1375 MHz on this particular card. It features 2048 SPUs as well as 128 Texture Address Units and 32 ROPs.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon R9 M295X		125 Watts
GeForce GTX 660 Ti		150 Watts
	Difference: 25 Watts (20%)

Memory Bandwidth

Theoretically speaking, the Radeon R9 M295X is 22% faster than the GeForce GTX 660 Ti in general, because of its higher data rate. (explain)

Radeon R9 M295X		176000 MB/sec
GeForce GTX 660 Ti		144000 MB/sec
	Difference: 32000 (22%)

Texel Rate

The GeForce GTX 660 Ti is a small bit (approximately 7%) better at AF than the Radeon R9 M295X. (explain)

GeForce GTX 660 Ti		102480 Mtexels/sec
Radeon R9 M295X		96000 Mtexels/sec
	Difference: 6480 (7%)

Pixel Rate

The Radeon R9 M295X is a small bit (approximately 9%) more effective at full screen anti-aliasing than the GeForce GTX 660 Ti, and will be capable of handling higher resolutions without losing too much performance. (explain)

Radeon R9 M295X		24000 Mpixels/sec
GeForce GTX 660 Ti		21960 Mpixels/sec
	Difference: 2040 (9%)

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 (in units of MB per second) that can be moved over the external memory interface in a second. The number is calculated by multiplying the bus width by its memory speed. If the card has DDR type RAM, it should be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. The better the card's memory bandwidth, the faster the card will be in general. It especially helps with anti-aliasing, HDR and high resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that are applied in one second. This figure is calculated by multiplying the total number of texture units of the card 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 processed in one second.

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