Radeon HD 7990 vs Radeon R7 M260

Intro

Compare those specifications to the Radeon R7 M260, which features a clock frequency of 715 MHz and a DDR3 memory speed of 1000 MHz. It also makes use of a 64-bit memory bus, and makes use of a 28 nm design. It features 384 SPUs, 24 TAUs, 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 7990		15520 points
Radeon R7 M260		1120 points
	Difference: 14400 (1286%)

Power Usage and Theoretical Benchmarks

Memory Bandwidth

The Radeon HD 7990, in theory, should perform much faster than the Radeon R7 M260 overall. (explain)

Radeon HD 7990		576000 MB/sec
Radeon R7 M260		16000 MB/sec
	Difference: 560000 (3500%)

Texel Rate

The Radeon HD 7990 will be much (approximately 1317%) better at AF than the Radeon R7 M260. (explain)

Radeon HD 7990		243200 Mtexels/sec
Radeon R7 M260		17160 Mtexels/sec
	Difference: 226040 (1317%)

Pixel Rate

The Radeon HD 7990 will be a lot (more or less 963%) faster with regards to full screen anti-aliasing than the Radeon R7 M260, and will be able to handle higher resolutions while still performing well. (explain)

Radeon HD 7990		60800 Mpixels/sec
Radeon R7 M260		5720 Mpixels/sec
	Difference: 55080 (963%)

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 max amount of information (measured in megabytes per second) that can be transferred across the external memory interface in one second. It is calculated by multiplying the interface width by its memory speed. If it uses DDR type RAM, the result should be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The higher the memory bandwidth, the faster the card will be in general. It especially helps with AA, High Dynamic Range and higher screen resolutions.

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

Pixel Rate: Pixel rate is the most pixels the video card could possibly write to the local memory per second - measured in millions of pixels per second. The number is worked out by multiplying the number of ROPs by the the core speed of the card. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel rate also depends on quite a few other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the potential to reach the max fill rate.