Radeon HD 6990 vs Radeon R7 240

Intro

Compare all that to the Radeon R7 240, which has a clock frequency of 730 MHz and a DDR3 memory frequency of 900 MHz. It also makes use of a 128-bit bus, and makes use of a 28 nm design. It is comprised of 320 SPUs, 20 Texture Address Units, and 8 ROPs.

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 240		1218 points
	Difference: 4602 (378%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon R7 240		30 Watts
Radeon HD 6990		375 Watts
	Difference: 345 Watts (1150%)

Memory Bandwidth

In theory, the Radeon HD 6990 should be a lot faster than the Radeon R7 240 in general. (explain)

Radeon HD 6990		320000 MB/sec
Radeon R7 240		28800 MB/sec
	Difference: 291200 (1011%)

Texel Rate

The Radeon HD 6990 should be much (more or less 992%) better at texture filtering than the Radeon R7 240. (explain)

Radeon HD 6990		159360 Mtexels/sec
Radeon R7 240		14600 Mtexels/sec
	Difference: 144760 (992%)

Pixel Rate

If running with high levels of AA is important to you, then the Radeon HD 6990 is superior to the Radeon R7 240, by far. (explain)

Radeon HD 6990		53120 Mpixels/sec
Radeon R7 240		5840 Mpixels/sec
	Difference: 47280 (810%)

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 MB per second) that can be transported across the external memory interface in one second. It's worked out by multiplying the card's bus width by its memory speed. If it uses DDR type memory, it must be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The better the memory bandwidth, the faster 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 can be processed per second. This is worked out by multiplying the total texture units by the core clock 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 processed in a second.

Pixel Rate: Pixel rate is the maximum amount of pixels the video card can possibly record to its local memory in a second - measured in millions of pixels per second. The figure is worked out by multiplying the amount of Render Output Units by the the core clock speed. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel output rate also depends on quite a few other factors, especially the memory bandwidth of the card - the lower the memory bandwidth is, the lower the ability to reach the maximum fill rate.