Radeon HD 7990 vs Radeon R7 260X

Intro

Compare those specs to the Radeon R7 260X, which features GPU core speed of 1100 MHz, and 2048 MB of GDDR5 RAM set to run at 1625 MHz through a 128-bit bus. It also features 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 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

Performance-wise, the Radeon HD 7990 should in theory be quite a bit better 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 much (about 295%) more effective 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

If using a high resolution is important to you, then the Radeon HD 7990 is the winner, 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: Bandwidth is the max amount of data (in units of MB per second) that can be moved across the external memory interface within a second. It's worked out by multiplying the card's interface width by its memory speed. In the case of DDR RAM, it should be multiplied by 2 once again. If DDR5, multiply by 4 instead. The better the card's memory bandwidth, the better the card will be in general. It especially helps with AA, HDR and higher screen resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that can be processed in one second. This number is calculated by multiplying the total amount of texture units by the core speed of the chip. The better this number, the better the graphics card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels in a second.

Pixel Rate: Pixel rate is the most pixels that the graphics card could possibly write to its local memory in one second - measured in millions of pixels per second. The number is worked out by multiplying the number of colour ROPs by the clock speed of the card. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel output rate is also dependant on quite a few other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the ability to reach the maximum fill rate.