Radeon R9 M265X vs Radeon R9 M290X

Intro

Compare all that to the Radeon R9 M290X, which uses a 28 nm design. AMD has clocked the core frequency at 850 MHz. The GDDR5 memory works at a frequency of 1200 MHz on this particular model. It features 1280 SPUs along with 80 Texture Address Units and 32 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Memory Bandwidth

Performance-wise, the Radeon R9 M290X should theoretically be quite a bit better than 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 will be a lot (approximately 196%) faster with regards to 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

The Radeon R9 M290X will be much (approximately 196%) faster with regards to anti-aliasing than the Radeon R9 M265X, and able to handle higher screen resolutions without losing too much performance. (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 data (counted in MB per second) that can be transported over the external memory interface in one second. The number is calculated by multiplying the interface width by its memory clock speed. In the case of DDR type RAM, it must be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The higher 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 are applied in one second. This is calculated by multiplying the total texture units of the card by the core speed of the chip. The higher this number, the better the card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied in one second.

Pixel Rate: Pixel rate is the most pixels the video card could possibly write to its local memory in one 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 - sometimes also referred to as Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel rate is also dependant on many other factors, especially the memory bandwidth of the card - the lower the memory bandwidth is, the lower the ability to get to the max fill rate.