Radeon R9 M265X vs Radeon R9 M280X

Intro

Compare all that to the Radeon R9 M280X, which has core speeds of 900 MHz on the GPU, and 1375 MHz on the 4096 MB of GDDR5 RAM. It features 896 SPUs along with 56 Texture Address Units and 16 Rasterization Operator Units.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Memory Bandwidth

In theory, the Radeon R9 M280X should be a lot faster than the Radeon R9 M265X overall. (explain)

Radeon R9 M280X		88000 MB/sec
Radeon R9 M265X		72000 MB/sec
	Difference: 16000 (22%)

Texel Rate

The Radeon R9 M280X will be quite a bit (approximately 119%) faster with regards to AF than the Radeon R9 M265X. (explain)

Radeon R9 M280X		50400 Mtexels/sec
Radeon R9 M265X		23000 Mtexels/sec
	Difference: 27400 (119%)

Pixel Rate

The Radeon R9 M280X should be a lot (more or less 57%) more effective at anti-aliasing than the Radeon R9 M265X, and will be capable of handling higher screen resolutions while still performing well. (explain)

Radeon R9 M280X		14400 Mpixels/sec
Radeon R9 M265X		9200 Mpixels/sec
	Difference: 5200 (57%)

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 megabytes per second) that can be transported past the external memory interface in a second. It is calculated by multiplying the interface width by the speed of its memory. If the card has DDR type memory, 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 AA, HDR and high resolutions.

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

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics card could possibly write to the local memory per second - measured in millions of pixels per second. The figure is calculated by multiplying the number of Raster Operations Pipelines by the the card's clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel fill rate is also dependant on lots of other factors, most notably the memory bandwidth of the card - the lower the bandwidth is, the lower the potential to get to the max fill rate.