GeForce GTX 470 vs Radeon HD 7990

Intro

Compare all of that to the Radeon HD 7990, which makes use of a 28 nm design. AMD has clocked the core speed at 950 MHz. The GDDR5 RAM runs at a speed of 1500 MHz on this specific model. It features 2048 SPUs along with 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 470		2937 points
	Difference: 12583 (428%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 470		215 Watts
Radeon HD 7990		375 Watts
	Difference: 160 Watts (74%)

Memory Bandwidth

Theoretically speaking, the Radeon HD 7990 is 330% quicker than the GeForce GTX 470 overall, due to its higher data rate. (explain)

Radeon HD 7990		576000 MB/sec
GeForce GTX 470		133920 MB/sec
	Difference: 442080 (330%)

Texel Rate

The Radeon HD 7990 should be much (about 615%) better at texture filtering than the GeForce GTX 470. (explain)

Radeon HD 7990		243200 Mtexels/sec
GeForce GTX 470		33992 Mtexels/sec
	Difference: 209208 (615%)

Pixel Rate

The Radeon HD 7990 is a lot (about 150%) faster with regards to AA than the GeForce GTX 470, and will be capable of handling higher resolutions more effectively. (explain)

Radeon HD 7990		60800 Mpixels/sec
GeForce GTX 470		24280 Mpixels/sec
	Difference: 36520 (150%)

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 largest amount of information (measured in MB per second) that can be transferred across the external memory interface in one second. It's worked out by multiplying the interface width by its memory clock speed. If the card has DDR memory, it must be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The better the memory bandwidth, the faster the card will be in general. It especially helps with anti-aliasing, HDR and higher screen resolutions.

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

Pixel Rate: Pixel rate is the most pixels the video card can possibly write to its local memory in one second - measured in millions of pixels per second. The figure is calculated by multiplying the number of Render Output Units by the the core speed of the card. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel output rate also depends on lots of other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the potential to reach the maximum fill rate.