Geforce GTX 670 vs Radeon HD 7990

Intro

Compare that to the Radeon HD 7990, which has core speeds of 950 MHz on the GPU, and 1500 MHz on the 3072 MB of GDDR5 memory. It features 2048 SPUs as well as 128 TAUs and 32 Rasterization Operator 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
Geforce GTX 670		7351 points
	Difference: 8169 (111%)

Ethereum Mining Hash Rate

Radeon HD 7990		32 Mh/s
Geforce GTX 670		13 Mh/s
	Difference: 19 (146%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Geforce GTX 670		170 Watts
Radeon HD 7990		375 Watts
	Difference: 205 Watts (121%)

Memory Bandwidth

Performance-wise, the Radeon HD 7990 should in theory be quite a bit better than the Geforce GTX 670 overall. (explain)

Radeon HD 7990		576000 MB/sec
Geforce GTX 670		192000 MB/sec
	Difference: 384000 (200%)

Texel Rate

The Radeon HD 7990 will be quite a bit (more or less 137%) faster with regards to AF than the Geforce GTX 670. (explain)

Radeon HD 7990		243200 Mtexels/sec
Geforce GTX 670		102480 Mtexels/sec
	Difference: 140720 (137%)

Pixel Rate

The Radeon HD 7990 is much (approximately 108%) faster with regards to FSAA than the Geforce GTX 670, and will be capable of handling higher screen resolutions while still performing well. (explain)

Radeon HD 7990		60800 Mpixels/sec
Geforce GTX 670		29280 Mpixels/sec
	Difference: 31520 (108%)

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 largest amount of information (measured in MB per second) that can be moved across the external memory interface in a second. It is worked out by multiplying the bus width by its memory clock speed. If it uses DDR type memory, the result should be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The better the memory bandwidth, the faster the card will be in general. It especially helps with AA, HDR and higher screen resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that are applied per second. This number is worked out by multiplying the total texture units of the card by the core clock speed of the chip. The better the texel rate, the better the video card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed in a second.

Pixel Rate: Pixel rate is the most pixels the video card could possibly record to its local memory in one second - measured in millions of pixels per second. The number is worked out by multiplying the number of Raster Operations Pipelines by the the card's clock speed. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel rate also depends on lots of other factors, most notably the memory bandwidth of the card - the lower the bandwidth is, the lower the ability to reach the maximum fill rate.