Geforce GTX 670 vs Radeon R9 M265X

Intro

Compare those specifications to the Radeon R9 M265X, which comes with GPU core speed of 575 MHz, and 2048 MB of GDDR5 memory running at 1125 MHz through a 128-bit bus. It also 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 670 should be 167% faster than the Radeon R9 M265X in general, because of its greater data rate. (explain)

Geforce GTX 670		192000 MB/sec
Radeon R9 M265X		72000 MB/sec
	Difference: 120000 (167%)

Texel Rate

The Geforce GTX 670 should be much (about 346%) better at texture filtering than the Radeon R9 M265X. (explain)

Geforce GTX 670		102480 Mtexels/sec
Radeon R9 M265X		23000 Mtexels/sec
	Difference: 79480 (346%)

Pixel Rate

The Geforce GTX 670 should be much (about 218%) better at full screen anti-aliasing than the Radeon R9 M265X, and also will be able to handle higher resolutions while still performing well. (explain)

Geforce GTX 670		29280 Mpixels/sec
Radeon R9 M265X		9200 Mpixels/sec
	Difference: 20080 (218%)

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 transported across the external memory interface in one second. The number is worked out by multiplying the card's bus width by its memory clock speed. If the card has DDR RAM, it must be multiplied by 2 again. If DDR5, multiply by 4 instead. The better the card's memory bandwidth, 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 processed per second. This number is worked out by multiplying the total amount of texture units by the core clock speed of the chip. The better this number, the better the card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied in one second.

Pixel Rate: Pixel rate is the maximum number of pixels the video card can possibly record to the local memory in a second - measured in millions of pixels per second. The figure is worked out by multiplying the amount of Raster Operations Pipelines by the the core clock speed. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel output rate also depends on quite a few other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the ability to get to the maximum fill rate.