Radeon HD 5870 vs Radeon R7 M265

Intro

Compare those specifications to the Radeon R7 M265, which features clock speeds of 725 MHz on the GPU, and 1000 MHz on the 2048 MB of DDR3 memory. It features 384 SPUs along with 24 TAUs and 8 Rasterization Operator Units.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Memory Bandwidth

In theory, the Radeon HD 5870 should perform much faster than the Radeon R7 M265 in general. (explain)

Radeon HD 5870		153600 MB/sec
Radeon R7 M265		32000 MB/sec
	Difference: 121600 (380%)

Texel Rate

The Radeon HD 5870 should be much (about 291%) more effective at AF than the Radeon R7 M265. (explain)

Radeon HD 5870		68000 Mtexels/sec
Radeon R7 M265		17400 Mtexels/sec
	Difference: 50600 (291%)

Pixel Rate

The Radeon HD 5870 should be quite a bit (approximately 369%) faster with regards to FSAA than the Radeon R7 M265, and will be able to handle higher resolutions while still performing well. (explain)

Radeon HD 5870		27200 Mpixels/sec
Radeon R7 M265		5800 Mpixels/sec
	Difference: 21400 (369%)

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 largest amount of information (in units of megabytes per second) that can be moved across the external memory interface within a second. It is calculated by multiplying the card's interface width by the speed of its memory. If the card has DDR type RAM, it must be multiplied by 2 once again. If 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 are applied in one second. This number is worked out by multiplying the total texture units by the core clock speed of the chip. The better this number, the better the graphics card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed in one second.

Pixel Rate: Pixel rate is the maximum number of pixels the graphics card could possibly record to the local memory in a second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the amount of Render Output Units by the the core speed of the card. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel rate also depends on many other factors, most notably the memory bandwidth of the card - the lower the memory bandwidth is, the lower the potential to reach the max fill rate.