Geforce GTX 680 vs Radeon HD 7990

Intro

Compare those specifications to the Radeon HD 7990, which has clock speeds of 950 MHz on the GPU, and 1500 MHz on the 3072 MB of GDDR5 RAM. It features 2048 SPUs along with 128 Texture Address Units and 32 Rasterization Operator 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 HD 7990		15520 points
Geforce GTX 680		7650 points
	Difference: 7870 (103%)

Ethereum Mining Hash Rate

Radeon HD 7990		32 Mh/s
Geforce GTX 680		16 Mh/s
	Difference: 16 (100%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Geforce GTX 680		195 Watts
Radeon HD 7990		375 Watts
	Difference: 180 Watts (92%)

Memory Bandwidth

Theoretically speaking, the Radeon HD 7990 will be 200% faster than the Geforce GTX 680 overall, because of its higher data rate. (explain)

Radeon HD 7990		576000 MB/sec
Geforce GTX 680		192256 MB/sec
	Difference: 383744 (200%)

Texel Rate

The Radeon HD 7990 should be much (about 89%) faster with regards to AF than the Geforce GTX 680. (explain)

Radeon HD 7990		243200 Mtexels/sec
Geforce GTX 680		128768 Mtexels/sec
	Difference: 114432 (89%)

Pixel Rate

If using high levels of AA is important to you, then the Radeon HD 7990 is superior to the Geforce GTX 680, by far. (explain)

Radeon HD 7990		60800 Mpixels/sec
Geforce GTX 680		32192 Mpixels/sec
	Difference: 28608 (89%)

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 data (measured in MB per second) that can be transported past the external memory interface in a second. It's worked out by multiplying the bus width by the speed of its memory. In the case of DDR type memory, it must be multiplied by 2 once again. If DDR5, multiply by 4 instead. 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 number of texture map elements (texels) that can be processed in one second. This figure is worked out by multiplying the total texture units of the card 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 applied in a second.

Pixel Rate: Pixel rate is the maximum amount of pixels the video card can possibly write to its local memory in a second - measured in millions of pixels per second. The figure is worked out by multiplying the number of ROPs by the the core clock speed. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel rate is also dependant on quite a few other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the potential to get to the maximum fill rate.