Radeon HD 6990 vs Radeon R7 M265

Intro

Compare those specs to the Radeon R7 M265, which comes with a GPU core clock speed of 725 MHz, and 2048 MB of DDR3 memory set to run at 1000 MHz through a 128-bit bus. It also is comprised of 384 SPUs, 24 Texture Address Units, and 8 Raster Operation 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 6990		5820 points
Radeon R7 M265		3256 points
	Difference: 2564 (79%)

Ethereum Mining Hash Rate

Radeon HD 6990		24 Mh/s
Radeon R7 M265		14 Mh/s
	Difference: 10 (71%)

Power Usage and Theoretical Benchmarks

Memory Bandwidth

Theoretically speaking, the Radeon HD 6990 is 900% faster than the Radeon R7 M265 overall, due to its higher data rate. (explain)

Radeon HD 6990		320000 MB/sec
Radeon R7 M265		32000 MB/sec
	Difference: 288000 (900%)

Texel Rate

The Radeon HD 6990 is a lot (about 816%) faster with regards to texture filtering than the Radeon R7 M265. (explain)

Radeon HD 6990		159360 Mtexels/sec
Radeon R7 M265		17400 Mtexels/sec
	Difference: 141960 (816%)

Pixel Rate

The Radeon HD 6990 is much (more or less 816%) faster with regards to anti-aliasing than the Radeon R7 M265, and should be capable of handling higher resolutions more effectively. (explain)

Radeon HD 6990		53120 Mpixels/sec
Radeon R7 M265		5800 Mpixels/sec
	Difference: 47320 (816%)

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.

One or more cards in this comparison are multi-core. This means that their bandwidth, texel and pixel rates are theoretically doubled - this does not mean the card will actually perform twice as fast, but only that it should in theory be able to. Actual game benchmarks will give a more accurate idea of what it's capable of.

Price Comparison

Specifications

Memory Bandwidth: Memory bandwidth is the largest amount of data (measured in MB per second) that can be moved across the external memory interface in a second. The number is calculated by multiplying the card's bus width by its memory speed. If the card has DDR RAM, it should be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The better the bandwidth is, the better 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 number is worked out by multiplying the total texture units by the core clock 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 processed per second.

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics chip could possibly record to the local memory per second - measured in millions of pixels per second. The figure is worked out by multiplying the number of Raster Operations Pipelines 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 output rate is also dependant on lots of other factors, especially the memory bandwidth of the card - the lower the bandwidth is, the lower the potential to reach the maximum fill rate.