Radeon R9 M265X vs Radeon R9 M290X

Intro

Compare all of that to the Radeon R9 M290X, which has a clock frequency of 850 MHz and a GDDR5 memory frequency of 1200 MHz. It also uses a 256-bit bus, and makes use of a 28 nm design. It is made up of 1280 SPUs, 80 Texture Address Units, and 32 Raster Operation Units.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Memory Bandwidth

Performance-wise, the Radeon R9 M290X should in theory be much superior to the Radeon R9 M265X overall. (explain)

Radeon R9 M290X		153600 MB/sec
Radeon R9 M265X		72000 MB/sec
	Difference: 81600 (113%)

Texel Rate

The Radeon R9 M290X is quite a bit (about 196%) more effective at anisotropic filtering than the Radeon R9 M265X. (explain)

Radeon R9 M290X		68000 Mtexels/sec
Radeon R9 M265X		23000 Mtexels/sec
	Difference: 45000 (196%)

Pixel Rate

If running with a high screen resolution is important to you, then the Radeon R9 M290X is superior to the Radeon R9 M265X, by far. (explain)

Radeon R9 M290X		27200 Mpixels/sec
Radeon R9 M265X		9200 Mpixels/sec
	Difference: 18000 (196%)

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 transported over the external memory interface in a second. It is worked out by multiplying the card's bus width by its memory speed. If the card has DDR memory, it should be multiplied by 2 again. If DDR5, multiply by 4 instead. The better the bandwidth is, the better the card will be in general. It especially helps with AA, High Dynamic Range and high resolutions.

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

Pixel Rate: Pixel rate is the maximum amount of pixels the graphics card could possibly record to its local memory per second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the amount of ROPs by the clock speed of the card. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel rate is also dependant on quite a few other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the ability to get to the max fill rate.