GeForce GTX 285 1GB vs Radeon R9 M380

Intro

Compare all of that to the Radeon R9 M380, which makes use of a 28 nm design. AMD has set the core frequency at 1000 MHz. The GDDR5 RAM works at a speed of 1500 MHz on this particular model. It features 640 SPUs along with 40 Texture Address Units and 16 Rasterization Operator Units.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Memory Bandwidth

Theoretically speaking, the GeForce GTX 285 1GB is 66% faster than the Radeon R9 M380 in general, because of its higher data rate. (explain)

GeForce GTX 285 1GB		158976 MB/sec
Radeon R9 M380		96000 MB/sec
	Difference: 62976 (66%)

Texel Rate

The GeForce GTX 285 1GB is a lot (about 30%) better at anisotropic filtering than the Radeon R9 M380. (explain)

GeForce GTX 285 1GB		51840 Mtexels/sec
Radeon R9 M380		40000 Mtexels/sec
	Difference: 11840 (30%)

Pixel Rate

If using lots of anti-aliasing is important to you, then the GeForce GTX 285 1GB is a better choice, by a large margin. (explain)

GeForce GTX 285 1GB		20736 Mpixels/sec
Radeon R9 M380		16000 Mpixels/sec
	Difference: 4736 (30%)

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 MB per second) that can be transferred past the external memory interface within a second. It's worked out by multiplying the interface width by the speed of its memory. In the case of DDR type memory, the result should be multiplied by 2 again. If DDR5, multiply by 4 instead. The higher the card's memory bandwidth, the better the card will be in general. It especially helps with AA, High Dynamic Range and high resolutions.

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

Pixel Rate: Pixel rate is the maximum amount of pixels the graphics card can possibly write to the local memory in a second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the number of Raster Operations Pipelines by the the core clock speed. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel output rate also depends on lots of other factors, most notably the memory bandwidth of the card - the lower the memory bandwidth is, the lower the ability to reach the max fill rate.