GeForce GTX 750 vs Radeon HD 7990

Intro

Compare all that to the Radeon HD 7990, which comes with a clock speed of 950 MHz and a GDDR5 memory frequency of 1500 MHz. It also makes use of a 384-bit bus, and uses a 28 nm design. It features 2048 SPUs, 128 TAUs, and 32 ROPs.

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 750		3958 points
	Difference: 11562 (292%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 750		55 Watts
Radeon HD 7990		375 Watts
	Difference: 320 Watts (582%)

Memory Bandwidth

Theoretically speaking, the Radeon HD 7990 should be much faster than the GeForce GTX 750 in general. (explain)

Radeon HD 7990		576000 MB/sec
GeForce GTX 750		80000 MB/sec
	Difference: 496000 (620%)

Texel Rate

The Radeon HD 7990 is much (more or less 645%) more effective at AF than the GeForce GTX 750. (explain)

Radeon HD 7990		243200 Mtexels/sec
GeForce GTX 750		32640 Mtexels/sec
	Difference: 210560 (645%)

Pixel Rate

The Radeon HD 7990 will be quite a bit (approximately 273%) more effective at anti-aliasing than the GeForce GTX 750, and should be able to handle higher resolutions while still performing well. (explain)

Radeon HD 7990		60800 Mpixels/sec
GeForce GTX 750		16320 Mpixels/sec
	Difference: 44480 (273%)

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 (counted in megabytes per second) that can be moved past the external memory interface in one second. It is calculated by multiplying the card's interface width by the speed of its memory. If it uses DDR RAM, the result should be multiplied by 2 once again. If DDR5, multiply by 4 instead. The higher the memory bandwidth, the better the card will be in general. It especially helps with AA, HDR and higher screen resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that are processed per second. This figure 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 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 the local memory per second - measured in millions of pixels per second. The number is calculated by multiplying the number of Render Output Units by the the card's clock speed. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel rate is also dependant on lots of other factors, especially the memory bandwidth of the card - the lower the bandwidth is, the lower the ability to reach the max fill rate.