Radeon HD 6790 vs Radeon R9 295X2

Intro

Compare all that to the Radeon R9 295X2, which comes with a clock speed of 1018 MHz and a GDDR5 memory frequency of 1250 MHz. It also uses a 512-bit memory bus, and uses a 28 nm design. It is made up of 2816 SPUs, 176 Texture Address Units, and 64 Raster Operation Units.

Display Graphs

Hide Graphs

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 R9 295X2		21205 points
Radeon HD 6790		2150 points
	Difference: 19055 (886%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 6790		150 Watts
Radeon R9 295X2		500 Watts
	Difference: 350 Watts (233%)

Memory Bandwidth

As far as performance goes, the Radeon R9 295X2 should in theory be quite a bit better than the Radeon HD 6790 overall. (explain)

Radeon R9 295X2		640000 MB/sec
Radeon HD 6790		134400 MB/sec
	Difference: 505600 (376%)

Texel Rate

The Radeon R9 295X2 will be quite a bit (approximately 966%) more effective at anisotropic filtering than the Radeon HD 6790. (explain)

Radeon R9 295X2		358336 Mtexels/sec
Radeon HD 6790		33600 Mtexels/sec
	Difference: 324736 (966%)

Pixel Rate

The Radeon R9 295X2 is quite a bit (about 870%) faster with regards to full screen anti-aliasing than the Radeon HD 6790, and also should be capable of handling higher resolutions while still performing well. (explain)

Radeon R9 295X2		130304 Mpixels/sec
Radeon HD 6790		13440 Mpixels/sec
	Difference: 116864 (870%)

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 (counted in megabytes per second) that can be transported over the external memory interface in one second. The number is calculated by multiplying the interface width by its memory clock speed. If the card has DDR type RAM, it should be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The higher the memory bandwidth, the faster 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 are applied per second. This figure is worked out by multiplying the total number of texture units by the core speed of the chip. The higher the texel rate, the better the graphics card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed in one second.

Pixel Rate: Pixel rate is the most pixels the video card could possibly write to its local memory in one second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the amount of Raster Operations Pipelines by the the card's clock speed. ROPs (Raster Operations Pipelines - also sometimes 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 potential to get to the max fill rate.