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 frequency of 1250 MHz. It also makes use of a 512-bit bus, and makes use of a 28 nm design. It features 2816 SPUs, 176 Texture Address Units, and 64 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 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

In theory, the Radeon R9 295X2 will be 567% quicker than the Radeon HD 7790 overall, because of its greater bandwidth. (explain)

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

Texel Rate

The Radeon R9 295X2 is much (about 540%) faster with regards to texture 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 should be quite a bit (approximately 714%) more effective at FSAA than the Radeon HD 7790, and should be able to handle higher resolutions without slowing down too much. (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: Bandwidth is the max amount of information (in units of MB per second) that can be moved past the external memory interface in a second. The number is calculated by multiplying the bus width by its memory speed. If it uses DDR memory, the result should be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The higher the card's memory bandwidth, the better the card will be in general. It especially helps with anti-aliasing, HDR and higher screen resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that are applied in one second. This figure is calculated by multiplying the total number 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 per second.

Pixel Rate: Pixel rate is the maximum amount of pixels the graphics card could possibly record to the local memory per second - measured in millions of pixels per second. The figure is calculated by multiplying the number 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 drawing the pixels (image) on the screen. The actual pixel output 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 get to the max fill rate.