Radeon HD 6990 vs Radeon R7 260X

Intro

Compare those specifications to the Radeon R7 260X, which makes use of a 28 nm design. AMD has clocked the core frequency at 1100 MHz. The GDDR5 RAM works at a speed of 1625 MHz on this specific card. It features 896 SPUs as well as 56 TAUs and 16 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 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

Theoretically speaking, the Radeon HD 6990 should be 208% faster than the Radeon R7 260X overall, because of its greater data rate. (explain)

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

Texel Rate

The Radeon HD 6990 should be a lot (more or less 159%) more effective at AF than the Radeon R7 260X. (explain)

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

Pixel Rate

The Radeon HD 6990 will be quite a bit (approximately 202%) faster with regards to full screen anti-aliasing than the Radeon R7 260X, and should be capable of handling higher resolutions without losing too much performance. (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 information (measured in megabytes per second) that can be moved past the external memory interface in a second. The number is calculated by multiplying the card's bus width by its memory clock speed. If the card has DDR type memory, the result should be multiplied by 2 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, High Dynamic Range and high resolutions.

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

Pixel Rate: Pixel rate is the most pixels that the graphics card could possibly write to its local memory per second - measured in millions of pixels per second. The figure is worked out by multiplying the amount of ROPs by the the core speed of the card. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel fill rate also depends on many other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the potential to get to the max fill rate.