GeForce GTX Titan vs Radeon R9 M265X

Intro

Compare that to the Radeon R9 M265X, which has a core clock frequency of 575 MHz and a GDDR5 memory speed of 1125 MHz. It also uses a 128-bit memory bus, and uses a 28 nm design. It is comprised of 640 SPUs, 40 TAUs, and 16 Raster Operation Units.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Memory Bandwidth

In theory, the GeForce GTX Titan should be 301% quicker than the Radeon R9 M265X overall, due to its greater bandwidth. (explain)

GeForce GTX Titan		288384 MB/sec
Radeon R9 M265X		72000 MB/sec
	Difference: 216384 (301%)

Texel Rate

The GeForce GTX Titan should be a lot (more or less 715%) more effective at texture filtering than the Radeon R9 M265X. (explain)

GeForce GTX Titan		187488 Mtexels/sec
Radeon R9 M265X		23000 Mtexels/sec
	Difference: 164488 (715%)

Pixel Rate

The GeForce GTX Titan will be a lot (approximately 337%) faster with regards to AA than the Radeon R9 M265X, and able to handle higher screen resolutions more effectively. (explain)

GeForce GTX Titan		40176 Mpixels/sec
Radeon R9 M265X		9200 Mpixels/sec
	Difference: 30976 (337%)

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 max amount of data (counted in megabytes per second) that can be transferred across the external memory interface in a second. It's worked out by multiplying the card's bus width by its memory speed. If the card has DDR memory, it must be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The better the memory bandwidth, the better the card will be in general. It especially helps with AA, HDR and higher screen resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that are processed in one second. This figure is worked out by multiplying the total texture units by the core speed of the chip. The better the texel rate, the better the graphics card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied per second.

Pixel Rate: Pixel rate is the most pixels the video card can possibly write to its local memory per second - measured in millions of pixels per second. The number is worked out by multiplying the number of colour ROPs by the the card's clock speed. ROPs (Raster Operations Pipelines - also called 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 - the lower the bandwidth is, the lower the potential to reach the maximum fill rate.