Radeon HD 7990 vs Radeon R7 M265

Intro

Compare those specs to the Radeon R7 M265, which comes with core speeds of 725 MHz on the GPU, and 1000 MHz on the 2048 MB of DDR3 RAM. It features 384 SPUs as well as 24 Texture Address Units 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 7990		15520 points
Radeon R7 M265		3256 points
	Difference: 12264 (377%)

Ethereum Mining Hash Rate

Radeon HD 7990		32 Mh/s
Radeon R7 M265		14 Mh/s
	Difference: 18 (129%)

Power Usage and Theoretical Benchmarks

Memory Bandwidth

In theory, the Radeon HD 7990 will be 1700% faster than the Radeon R7 M265 overall, due to its higher bandwidth. (explain)

Radeon HD 7990		576000 MB/sec
Radeon R7 M265		32000 MB/sec
	Difference: 544000 (1700%)

Texel Rate

The Radeon HD 7990 is quite a bit (more or less 1298%) more effective at texture filtering than the Radeon R7 M265. (explain)

Radeon HD 7990		243200 Mtexels/sec
Radeon R7 M265		17400 Mtexels/sec
	Difference: 225800 (1298%)

Pixel Rate

If using a high screen resolution is important to you, then the Radeon HD 7990 is superior to the Radeon R7 M265, by far. (explain)

Radeon HD 7990		60800 Mpixels/sec
Radeon R7 M265		5800 Mpixels/sec
	Difference: 55000 (948%)

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: Bandwidth is the maximum amount of data (measured in megabytes per second) that can be transferred across the external memory interface in one second. The number is worked out by multiplying the interface width by its memory speed. If the card has DDR RAM, it must be multiplied by 2 again. If DDR5, multiply by 4 instead. The higher the card's memory bandwidth, the better 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 can be processed in one second. This figure is calculated by multiplying the total number of texture units of the card by the core speed of the chip. The better this number, the better the graphics card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels in one second.

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics chip could possibly write to its local memory per 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 outputting the pixels (image) to the screen. The actual pixel fill rate also depends on quite a few other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the ability to reach the maximum fill rate.