GeForce GTX 550 Ti vs Radeon HD 7990

Intro

Compare that to the Radeon HD 7990, which features a GPU core clock speed of 950 MHz, and 3072 MB of GDDR5 RAM running at 1500 MHz through a 384-bit bus. It also features 2048 Stream Processors, 128 Texture Address Units, and 32 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 HD 7990		15520 points
GeForce GTX 550 Ti		1897 points
	Difference: 13623 (718%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 550 Ti		116 Watts
Radeon HD 7990		375 Watts
	Difference: 259 Watts (223%)

Memory Bandwidth

Theoretically speaking, the Radeon HD 7990 should be 485% faster than the GeForce GTX 550 Ti in general, due to its higher bandwidth. (explain)

Radeon HD 7990		576000 MB/sec
GeForce GTX 550 Ti		98496 MB/sec
	Difference: 477504 (485%)

Texel Rate

The Radeon HD 7990 will be quite a bit (approximately 744%) faster with regards to AF than the GeForce GTX 550 Ti. (explain)

Radeon HD 7990		243200 Mtexels/sec
GeForce GTX 550 Ti		28800 Mtexels/sec
	Difference: 214400 (744%)

Pixel Rate

The Radeon HD 7990 will be much (more or less 181%) better at full screen anti-aliasing than the GeForce GTX 550 Ti, and should be capable of handling higher resolutions without losing too much performance. (explain)

Radeon HD 7990		60800 Mpixels/sec
GeForce GTX 550 Ti		21600 Mpixels/sec
	Difference: 39200 (181%)

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 maximum amount of data (measured in megabytes per second) that can be transferred past the external memory interface in a second. The number is calculated by multiplying the bus width by the speed of its memory. If the card has DDR type RAM, it must be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The better the memory bandwidth, the better the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and high resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that can be processed in one second. This number 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 texture filtering (anisotropic filtering - AF). It is measured in millions of texels in one second.

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics card could possibly write to its local memory in one second - measured in millions of pixels per second. The number is worked out by multiplying the amount of colour ROPs 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 rate is also dependant on many other factors, most notably the memory bandwidth of the card - the lower the bandwidth is, the lower the ability to get to the maximum fill rate.