Radeon HD 7990 vs Radeon R9 295X2

Intro

Compare all of that to the Radeon R9 295X2, which features a core clock frequency of 1018 MHz and a GDDR5 memory frequency of 1250 MHz. It also features a 512-bit bus, and uses a 28 nm design. It is made up of 2816 SPUs, 176 TAUs, 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 7990		15520 points
	Difference: 5685 (37%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 7990		375 Watts
Radeon R9 295X2		500 Watts
	Difference: 125 Watts (33%)

Memory Bandwidth

The Radeon R9 295X2 should theoretically be a bit faster than the Radeon HD 7990 overall. (explain)

Radeon R9 295X2		640000 MB/sec
Radeon HD 7990		576000 MB/sec
	Difference: 64000 (11%)

Texel Rate

The Radeon R9 295X2 is quite a bit (about 47%) faster with regards to AF than the Radeon HD 7990. (explain)

Radeon R9 295X2		358336 Mtexels/sec
Radeon HD 7990		243200 Mtexels/sec
	Difference: 115136 (47%)

Pixel Rate

The Radeon R9 295X2 will be quite a bit (about 114%) faster with regards to AA than the Radeon HD 7990, and also should be able to handle higher resolutions better. (explain)

Radeon R9 295X2		130304 Mpixels/sec
Radeon HD 7990		60800 Mpixels/sec
	Difference: 69504 (114%)

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 max amount of information (counted in MB per second) that can be transferred past the external memory interface in a second. It's calculated by multiplying the interface width by the speed of its memory. In the case of DDR type memory, it must be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The higher the memory bandwidth, the faster 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 applied per second. This is calculated by multiplying the total texture units of the card by the core clock speed of the chip. The better this number, the better the video card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied per second.

Pixel Rate: Pixel rate is the most pixels the video card can possibly record to its local memory in one second - measured in millions of pixels per second. The figure is worked out by multiplying the amount of ROPs by the clock speed of the card. 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 of the card - the lower the memory bandwidth is, the lower the ability to reach the maximum fill rate.