Radeon HD 6990 vs Radeon R7 260X

Intro

Compare those specs to the Radeon R7 260X, which has a clock frequency of 1100 MHz and a GDDR5 memory speed of 1625 MHz. It also features a 128-bit bus, and uses a 28 nm design. It is made up of 896 SPUs, 56 TAUs, and 16 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 260X		4381 points
	Difference: 1439 (33%)

Ethereum Mining Hash Rate

Radeon HD 6990		24 Mh/s
Radeon R7 260X		14 Mh/s
	Difference: 10 (71%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon R7 260X		115 Watts
Radeon HD 6990		375 Watts
	Difference: 260 Watts (226%)

Memory Bandwidth

The Radeon HD 6990 should in theory be quite a bit faster than the Radeon R7 260X in general. (explain)

Radeon HD 6990		320000 MB/sec
Radeon R7 260X		104000 MB/sec
	Difference: 216000 (208%)

Texel Rate

The Radeon HD 6990 should be quite a bit (approximately 159%) faster with regards to texture filtering than the Radeon R7 260X. (explain)

Radeon HD 6990		159360 Mtexels/sec
Radeon R7 260X		61600 Mtexels/sec
	Difference: 97760 (159%)

Pixel Rate

If using high levels of AA is important to you, then the Radeon HD 6990 is superior to the Radeon R7 260X, by far. (explain)

Radeon HD 6990		53120 Mpixels/sec
Radeon R7 260X		17600 Mpixels/sec
	Difference: 35520 (202%)

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 largest amount of data (in units of MB per second) that can be transferred across the external memory interface in a second. It is calculated by multiplying the card's interface width by its memory clock speed. If the card has DDR type memory, it should be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The higher the memory bandwidth, the better the card will be in general. It especially helps with anti-aliasing, HDR and high resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that can be applied per second. This is calculated by multiplying the total amount of texture units by the core speed of the chip. The higher 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 one second.

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