Radeon HD 7990 vs Radeon R7 260X

Intro

Compare all that to the Radeon R7 260X, which uses a 28 nm design. AMD has clocked the core frequency at 1100 MHz. The GDDR5 RAM runs at a speed of 1625 MHz on this particular model. It features 896 SPUs along with 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 7990		15520 points
Radeon R7 260X		4381 points
	Difference: 11139 (254%)

Ethereum Mining Hash Rate

Radeon HD 7990		32 Mh/s
Radeon R7 260X		14 Mh/s
	Difference: 18 (129%)

Zcash Mining Hash Rate

Radeon HD 7990		513 Sol/s
Radeon R7 260X		95 Sol/s
	Difference: 418 (440%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon R7 260X		115 Watts
Radeon HD 7990		375 Watts
	Difference: 260 Watts (226%)

Memory Bandwidth

The Radeon HD 7990 should in theory perform quite a bit faster than the Radeon R7 260X in general. (explain)

Radeon HD 7990		576000 MB/sec
Radeon R7 260X		104000 MB/sec
	Difference: 472000 (454%)

Texel Rate

The Radeon HD 7990 should be much (approximately 295%) more effective at anisotropic filtering than the Radeon R7 260X. (explain)

Radeon HD 7990		243200 Mtexels/sec
Radeon R7 260X		61600 Mtexels/sec
	Difference: 181600 (295%)

Pixel Rate

If using a high screen resolution is important to you, then the Radeon HD 7990 is a better choice, by a large margin. (explain)

Radeon HD 7990		60800 Mpixels/sec
Radeon R7 260X		17600 Mpixels/sec
	Difference: 43200 (245%)

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: Memory bandwidth is the maximum amount of information (in units of megabytes per second) that can be moved across the external memory interface within a second. It is worked out by multiplying the bus width by the speed of its memory. If the card has DDR RAM, the result should be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The better the card's memory bandwidth, the faster the card will be in general. It especially helps with anti-aliasing, HDR and high resolutions.

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

Pixel Rate: Pixel rate is the maximum number of pixels the video card could possibly record to the local memory per second - measured in millions of pixels per second. The figure is worked out by multiplying the amount of Raster Operations Pipelines 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 fill rate is also dependant on lots of other factors, especially the memory bandwidth of the card - the lower the memory bandwidth is, the lower the potential to reach the maximum fill rate.