GeForce GTX 285 1GB vs Radeon R9 M390X

Intro

Compare all of that to the Radeon R9 M390X, which features a core clock speed of 723 MHz and a GDDR5 memory speed of 1250 MHz. It also uses a 256-bit memory bus, and uses a 28 nm design. It features 2048 SPUs, 128 TAUs, and 32 Raster Operation Units.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon R9 M390X		125 Watts
GeForce GTX 285 1GB		204 Watts
	Difference: 79 Watts (63%)

Memory Bandwidth

Theoretically speaking, the Radeon R9 M390X is 1% faster than the GeForce GTX 285 1GB in general, because of its higher bandwidth. (explain)

Radeon R9 M390X		160000 MB/sec
GeForce GTX 285 1GB		158976 MB/sec
	Difference: 1024 (1%)

Texel Rate

The Radeon R9 M390X will be a lot (more or less 79%) better at texture filtering than the GeForce GTX 285 1GB. (explain)

Radeon R9 M390X		92544 Mtexels/sec
GeForce GTX 285 1GB		51840 Mtexels/sec
	Difference: 40704 (79%)

Pixel Rate

If using a high resolution is important to you, then the Radeon R9 M390X is superior to the GeForce GTX 285 1GB, but only just. (explain)

Radeon R9 M390X		23136 Mpixels/sec
GeForce GTX 285 1GB		20736 Mpixels/sec
	Difference: 2400 (12%)

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 (measured in MB per second) that can be transferred past the external memory interface in one second. It is worked out by multiplying the interface width by its memory speed. If the card has DDR memory, it should be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The higher the bandwidth is, the better the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and high resolutions.

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

Pixel Rate: Pixel rate is the most pixels that the graphics card can possibly write to the local memory in one second - measured in millions of pixels per second. The number is calculated by multiplying the amount of Render Output Units by the the card's clock speed. ROPs (Raster Operations Pipelines - also sometimes called 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, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the potential to get to the max fill rate.