Radeon R9 290 vs Radeon R9 M265X

Intro

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

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Memory Bandwidth

Performance-wise, the Radeon R9 290 should in theory be much superior to the Radeon R9 M265X in general. (explain)

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

Texel Rate

The Radeon R9 290 should be much (approximately 457%) more effective at AF than the Radeon R9 M265X. (explain)

Radeon R9 290		128000 Mtexels/sec
Radeon R9 M265X		23000 Mtexels/sec
	Difference: 105000 (457%)

Pixel Rate

The Radeon R9 290 is quite a bit (more or less 457%) better at full screen anti-aliasing than the Radeon R9 M265X, and also will be able to handle higher screen resolutions without losing too much performance. (explain)

Radeon R9 290		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: Memory bandwidth is the maximum amount of information (counted in megabytes per second) that can be transported across the external memory interface in a second. It's calculated by multiplying the card's bus width by its memory speed. If the card has DDR type RAM, it must be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The higher the bandwidth is, 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 number of texture map elements (texels) that can be applied per second. This number is calculated by multiplying the total amount of texture units of the card by the core 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 per second.

Pixel Rate: Pixel rate is the most pixels the graphics card could possibly write to its local memory in one second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the amount of colour ROPs by the the core speed of the card. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel fill rate is also dependant on lots of other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the ability to get to the max fill rate.