GeForce GTS 150 vs Radeon R9 390 8G

Intro

Compare all that to the Radeon R9 390 8G, which features a core clock speed of 1000 MHz and a GDDR5 memory speed of 1500 MHz. It also uses a 512-bit bus, and uses a 28 nm design. It is comprised of 2560 SPUs, 160 Texture Address Units, and 64 Raster Operation Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTS 150		141 Watts
Radeon R9 390 8G		275 Watts
	Difference: 134 Watts (95%)

Memory Bandwidth

Performance-wise, the Radeon R9 390 8G should theoretically be a lot superior to the GeForce GTS 150 in general. (explain)

Radeon R9 390 8G		384000 MB/sec
GeForce GTS 150		32000 MB/sec
	Difference: 352000 (1100%)

Texel Rate

The Radeon R9 390 8G should be much (more or less 238%) more effective at anisotropic filtering than the GeForce GTS 150. (explain)

Radeon R9 390 8G		160000 Mtexels/sec
GeForce GTS 150		47360 Mtexels/sec
	Difference: 112640 (238%)

Pixel Rate

The Radeon R9 390 8G should be much (more or less 441%) more effective at AA than the GeForce GTS 150, and also should be capable of handling higher resolutions while still performing well. (explain)

Radeon R9 390 8G		64000 Mpixels/sec
GeForce GTS 150		11840 Mpixels/sec
	Difference: 52160 (441%)

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 information (measured in MB per second) that can be transported over the external memory interface in a second. It's worked out by multiplying the bus width by its memory speed. If the card has DDR type RAM, it should be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The higher the bandwidth is, 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 texture map elements (texels) that can be applied per second. This number is calculated by multiplying the total texture units by the core speed of the chip. The higher the texel rate, the better the video card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied in one second.

Pixel Rate: Pixel rate is the most pixels the graphics card could possibly write to its local memory in one second - measured in millions of pixels per second. The number is calculated by multiplying the number of Raster Operations Pipelines by the clock speed of the card. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel fill rate also depends on quite a few other factors, especially the memory bandwidth of the card - the lower the memory bandwidth is, the lower the potential to get to the max fill rate.