Radeon HD 7990 vs Radeon R7 260X

Intro

Compare that to the Radeon R7 260X, which comes with core clock speeds of 1100 MHz on the GPU, and 1625 MHz on the 2048 MB of GDDR5 RAM. It features 896 SPUs as well as 56 Texture Address Units and 16 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 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

In theory, the Radeon HD 7990 should be quite a bit faster than the Radeon R7 260X overall. (explain)

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

Texel Rate

The Radeon HD 7990 is a lot (about 295%) better at AF than the Radeon R7 260X. (explain)

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

Pixel Rate

The Radeon HD 7990 should be a lot (more or less 245%) more effective at AA than the Radeon R7 260X, and will be able to handle higher resolutions better. (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 data (counted in MB per second) that can be moved over the external memory interface within a second. It's calculated by multiplying the interface width by its memory clock speed. If the card has DDR memory, the result should be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The higher the bandwidth is, the faster the card will be in general. It especially helps with AA, High Dynamic Range and high resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that can be processed per second. This figure is worked out by multiplying the total texture units of the card 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 processed in one second.

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics chip could possibly record to the local memory per second - measured in millions of pixels per second. The figure is calculated by multiplying the amount of ROPs by the the card's clock speed. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel rate is also dependant on lots of other factors, especially the memory bandwidth of the card - the lower the bandwidth is, the lower the potential to reach the maximum fill rate.