GeForce GTX 660 Ti vs Radeon R9 390X 8G

Intro

Compare those specifications to the Radeon R9 390X 8G, which features a clock frequency of 1050 MHz and a GDDR5 memory frequency of 1500 MHz. It also features a 512-bit bus, and makes use of a 28 nm design. It is comprised of 2816 SPUs, 176 Texture Address Units, and 64 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 R9 390X 8G		13555 points
GeForce GTX 660 Ti		6013 points
	Difference: 7542 (125%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 660 Ti		150 Watts
Radeon R9 390X 8G		275 Watts
	Difference: 125 Watts (83%)

Memory Bandwidth

As far as performance goes, the Radeon R9 390X 8G should theoretically be a lot superior to the GeForce GTX 660 Ti in general. (explain)

Radeon R9 390X 8G		384000 MB/sec
GeForce GTX 660 Ti		144000 MB/sec
	Difference: 240000 (167%)

Texel Rate

The Radeon R9 390X 8G will be much (more or less 80%) more effective at AF than the GeForce GTX 660 Ti. (explain)

Radeon R9 390X 8G		184800 Mtexels/sec
GeForce GTX 660 Ti		102480 Mtexels/sec
	Difference: 82320 (80%)

Pixel Rate

The Radeon R9 390X 8G is quite a bit (about 206%) faster with regards to anti-aliasing than the GeForce GTX 660 Ti, and will be able to handle higher resolutions without slowing down too much. (explain)

Radeon R9 390X 8G		67200 Mpixels/sec
GeForce GTX 660 Ti		21960 Mpixels/sec
	Difference: 45240 (206%)

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: Memory bandwidth is the maximum amount of data (counted in megabytes per second) that can be moved over the external memory interface in a second. It is calculated by multiplying the bus width by its memory clock speed. In the case of DDR memory, it should be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The better the bandwidth is, the faster the card will be in general. It especially helps with AA, HDR and high resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that can be applied per second. This figure is worked out by multiplying the total 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 applied per second.

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics card can possibly record to the local memory in one second - measured in millions of pixels per second. The figure is calculated by multiplying the amount 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 filling the screen with pixels (the image). The actual pixel rate is also dependant on lots of other factors, most notably the memory bandwidth of the card - the lower the bandwidth is, the lower the potential to reach the max fill rate.