GeForce GTS 450 1GB vs Radeon R9 390X 8G

Intro

Compare those specifications to the Radeon R9 390X 8G, which has a clock frequency of 1050 MHz and a GDDR5 memory speed of 1500 MHz. It also makes use of a 512-bit bus, and uses a 28 nm design. It is made up of 2816 SPUs, 176 TAUs, and 64 Raster Operation Units.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTS 450 1GB		106 Watts
Radeon R9 390X 8G		275 Watts
	Difference: 169 Watts (159%)

Memory Bandwidth

Theoretically speaking, the Radeon R9 390X 8G should perform much faster than the GeForce GTS 450 1GB overall. (explain)

Radeon R9 390X 8G		384000 MB/sec
GeForce GTS 450 1GB		57728 MB/sec
	Difference: 326272 (565%)

Texel Rate

The Radeon R9 390X 8G is much (about 638%) more effective at anisotropic filtering than the GeForce GTS 450 1GB. (explain)

Radeon R9 390X 8G		184800 Mtexels/sec
GeForce GTS 450 1GB		25056 Mtexels/sec
	Difference: 159744 (638%)

Pixel Rate

The Radeon R9 390X 8G will be a lot (about 436%) more effective at FSAA than the GeForce GTS 450 1GB, and will be capable of handling higher resolutions while still performing well. (explain)

Radeon R9 390X 8G		67200 Mpixels/sec
GeForce GTS 450 1GB		12528 Mpixels/sec
	Difference: 54672 (436%)

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 (measured in megabytes per second) that can be transferred across the external memory interface in one second. It's worked out by multiplying the interface width by the speed of its memory. In the case of DDR memory, it should be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The higher the card's memory bandwidth, the faster the card will be in general. It especially helps with AA, High Dynamic Range and high resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that are processed in one second. This figure is calculated by multiplying the total texture units of the card by the core 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 per second.

Pixel Rate: Pixel rate is the maximum number of pixels the video card could possibly write to the local memory per second - measured in millions of pixels per second. The figure is worked out by multiplying the amount of colour ROPs by the clock 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 fill rate also depends on lots of other factors, most notably the memory bandwidth of the card - the lower the bandwidth is, the lower the ability to get to the max fill rate.