GeForce GTX 260 Core 216 vs Radeon R9 390X 8G

Intro

Compare all that to the Radeon R9 390X 8G, which has GPU core speed of 1050 MHz, and 8192 MB of GDDR5 RAM running at 1500 MHz through a 512-bit bus. It also is made up of 2816 SPUs, 176 TAUs, and 64 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 260 Core 216		202 Watts
Radeon R9 390X 8G		275 Watts
	Difference: 73 Watts (36%)

Memory Bandwidth

In theory, the Radeon R9 390X 8G should be a lot faster than the GeForce GTX 260 Core 216 overall. (explain)

Radeon R9 390X 8G		384000 MB/sec
GeForce GTX 260 Core 216		111888 MB/sec
	Difference: 272112 (243%)

Texel Rate

The Radeon R9 390X 8G is much (about 346%) faster with regards to texture filtering than the GeForce GTX 260 Core 216. (explain)

Radeon R9 390X 8G		184800 Mtexels/sec
GeForce GTX 260 Core 216		41472 Mtexels/sec
	Difference: 143328 (346%)

Pixel Rate

The Radeon R9 390X 8G is a lot (approximately 317%) more effective at FSAA than the GeForce GTX 260 Core 216, and able to handle higher screen resolutions while still performing well. (explain)

Radeon R9 390X 8G		67200 Mpixels/sec
GeForce GTX 260 Core 216		16128 Mpixels/sec
	Difference: 51072 (317%)

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 max amount of data (counted in megabytes per second) that can be transferred past the external memory interface in one second. It's worked out by multiplying the card's interface width by the speed of its memory. If the card has DDR type memory, it must be multiplied by 2 once again. If DDR5, multiply by 4 instead. The higher the memory bandwidth, the faster the card will be in general. It especially helps with anti-aliasing, HDR and higher screen resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that are processed per second. This is worked out by multiplying the total amount of texture units by the core speed of the chip. The higher this number, the better the card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels in one second.

Pixel Rate: Pixel rate is the most pixels the video card could possibly record to its local memory in one second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the amount of colour ROPs by the clock speed of the card. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel fill rate also depends on lots of other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the ability to get to the max fill rate.