Radeon HD 7870 XT vs Radeon R7 M265

Intro

Compare all of that to the Radeon R7 M265, which uses a 28 nm design. AMD has set the core speed at 725 MHz. The DDR3 RAM runs at a speed of 1000 MHz on this particular model. It features 384 SPUs as well as 24 TAUs and 8 Rasterization Operator Units.

Display Graphs

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Benchmarks

These are real-world performance benchmarks that were submitted by Hardware Compare users. The scores seen here are the average of all benchmarks submitted for each respective test and hardware.

3DMark Fire Strike Graphics Score

Radeon HD 7870 XT		6390 points
Radeon R7 M265		3256 points
	Difference: 3134 (96%)

Ethereum Mining Hash Rate

Radeon HD 7870 XT		15 Mh/s
Radeon R7 M265		14 Mh/s
	Difference: 1 (7%)

Power Usage and Theoretical Benchmarks

Memory Bandwidth

Performance-wise, the Radeon HD 7870 XT should theoretically be quite a bit better than the Radeon R7 M265 overall. (explain)

Radeon HD 7870 XT		192000 MB/sec
Radeon R7 M265		32000 MB/sec
	Difference: 160000 (500%)

Texel Rate

The Radeon HD 7870 XT should be a lot (about 410%) better at texture filtering than the Radeon R7 M265. (explain)

Radeon HD 7870 XT		88800 Mtexels/sec
Radeon R7 M265		17400 Mtexels/sec
	Difference: 71400 (410%)

Pixel Rate

If using lots of anti-aliasing is important to you, then the Radeon HD 7870 XT is a better choice, and very much so. (explain)

Radeon HD 7870 XT		29600 Mpixels/sec
Radeon R7 M265		5800 Mpixels/sec
	Difference: 23800 (410%)

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 transferred past the external memory interface in one second. The number is calculated by multiplying the card's interface width by the speed of its memory. In the case of DDR memory, it must be multiplied by 2 again. If DDR5, multiply by 4 instead. The better the 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 in one second. This is worked out by multiplying the total number of texture units of the card by the core speed of the chip. The higher the texel rate, the better the graphics card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels in one second.

Pixel Rate: Pixel rate is the most pixels the graphics card could possibly record to the local memory per second - measured in millions of pixels per second. The number is worked out by multiplying the number of Render Output Units 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 output rate is also dependant on quite a few other factors, especially the memory bandwidth of the card - the lower the bandwidth is, the lower the ability to get to the max fill rate.