Radeon HD 7790 vs Radeon R9 295X2

Intro

Compare all of that to the Radeon R9 295X2, which has a core clock frequency of 1018 MHz and a GDDR5 memory speed of 1250 MHz. It also makes use of a 512-bit memory bus, and makes use of a 28 nm design. It is made up of 2816 SPUs, 176 Texture Address Units, and 64 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 R9 295X2		21205 points
Radeon HD 7790		4330 points
	Difference: 16875 (390%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 7790		85 Watts
Radeon R9 295X2		500 Watts
	Difference: 415 Watts (488%)

Memory Bandwidth

As far as performance goes, the Radeon R9 295X2 should in theory be much better than the Radeon HD 7790 overall. (explain)

Radeon R9 295X2		640000 MB/sec
Radeon HD 7790		96000 MB/sec
	Difference: 544000 (567%)

Texel Rate

The Radeon R9 295X2 is quite a bit (about 540%) faster with regards to anisotropic filtering than the Radeon HD 7790. (explain)

Radeon R9 295X2		358336 Mtexels/sec
Radeon HD 7790		56000 Mtexels/sec
	Difference: 302336 (540%)

Pixel Rate

The Radeon R9 295X2 is quite a bit (more or less 714%) faster with regards to full screen anti-aliasing than the Radeon HD 7790, and also will be capable of handling higher screen resolutions better. (explain)

Radeon R9 295X2		130304 Mpixels/sec
Radeon HD 7790		16000 Mpixels/sec
	Difference: 114304 (714%)

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 (in units of MB per second) that can be moved over the external memory interface in one second. It is worked out by multiplying the card's interface width by its memory clock speed. If it uses DDR type memory, the result should be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The better the bandwidth is, the better the card will be in general. It especially helps with anti-aliasing, HDR and high resolutions.

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

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics card can possibly write to the local memory in one second - measured in millions of pixels per second. The number is calculated by multiplying the amount of Raster Operations Pipelines by the the core speed of the card. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel output rate also depends on lots of other factors, most notably the memory bandwidth of the card - the lower the memory bandwidth is, the lower the potential to get to the max fill rate.