Radeon R9 290X vs Radeon R9 M265X

Intro

Compare all that to the Radeon R9 M265X, which has GPU clock speed of 575 MHz, and 2048 MB of GDDR5 RAM running at 1125 MHz through a 128-bit bus. It also is made up of 640 Stream Processors, 40 Texture Address Units, and 16 Raster Operation Units.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Memory Bandwidth

Theoretically speaking, the Radeon R9 290X should be 344% faster than the Radeon R9 M265X in general, due to its greater bandwidth. (explain)

Radeon R9 290X		320000 MB/sec
Radeon R9 M265X		72000 MB/sec
	Difference: 248000 (344%)

Texel Rate

The Radeon R9 290X will be much (approximately 512%) faster with regards to anisotropic filtering than the Radeon R9 M265X. (explain)

Radeon R9 290X		140800 Mtexels/sec
Radeon R9 M265X		23000 Mtexels/sec
	Difference: 117800 (512%)

Pixel Rate

If running with high levels of AA is important to you, then the Radeon R9 290X is superior to the Radeon R9 M265X, and very much so. (explain)

Radeon R9 290X		51200 Mpixels/sec
Radeon R9 M265X		9200 Mpixels/sec
	Difference: 42000 (457%)

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 megabytes per second) that can be moved across the external memory interface in one second. The number is calculated by multiplying the card's interface width by the speed of its memory. If it uses DDR RAM, the result should be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The better the bandwidth is, the faster the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and higher screen resolutions.

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

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