GeForce GTX 660 Ti vs Radeon HD 7950

Intro

Compare those specs to the Radeon HD 7950, which makes use of a 28 nm design. AMD has clocked the core frequency at 800 MHz. The GDDR5 RAM runs at a frequency of 1250 MHz on this particular model. It features 1792 SPUs as well as 112 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 7950		7731 points
GeForce GTX 660 Ti		6013 points
	Difference: 1718 (29%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 660 Ti		150 Watts
Radeon HD 7950		200 Watts
	Difference: 50 Watts (33%)

Memory Bandwidth

Theoretically speaking, the Radeon HD 7950 will be 67% faster than the GeForce GTX 660 Ti in general, due to its higher data rate. (explain)

Radeon HD 7950		240000 MB/sec
GeForce GTX 660 Ti		144000 MB/sec
	Difference: 96000 (67%)

Texel Rate

The GeForce GTX 660 Ti will be a small bit (approximately 14%) faster with regards to texture filtering than the Radeon HD 7950. (explain)

GeForce GTX 660 Ti		102480 Mtexels/sec
Radeon HD 7950		89600 Mtexels/sec
	Difference: 12880 (14%)

Pixel Rate

The Radeon HD 7950 should be a bit (approximately 17%) more effective at AA than the GeForce GTX 660 Ti, and should be capable of handling higher screen resolutions without slowing down too much. (explain)

Radeon HD 7950		25600 Mpixels/sec
GeForce GTX 660 Ti		21960 Mpixels/sec
	Difference: 3640 (17%)

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.

Price Comparison

Specifications

Memory Bandwidth: Bandwidth is the largest amount of data (in units of megabytes per second) that can be moved past the external memory interface in a second. It is worked out by multiplying the card's interface width by its memory clock speed. If it uses DDR type RAM, it must be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The better the bandwidth is, the better 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 are applied per second. This number is worked out by multiplying the total number of texture units of the card by the core speed of the chip. The better the texel rate, the better the card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied per second.

Pixel Rate: Pixel rate is the maximum amount of pixels the video card can possibly record to its local memory in a second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the number of Render Output Units by the clock speed of the card. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel fill rate is also dependant on many other factors, most notably the memory bandwidth of the card - the lower the bandwidth is, the lower the potential to get to the max fill rate.