GeForce 9400 GT 256MB vs Radeon R9 M380

Intro

Compare all of that to the Radeon R9 M380, which has a clock speed of 1000 MHz and a GDDR5 memory speed of 1500 MHz. It also makes use of a 128-bit memory bus, and makes use of a 28 nm design. It is comprised of 640 SPUs, 40 Texture Address Units, and 16 ROPs.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Memory Bandwidth

In theory, the Radeon R9 M380 will be 650% faster than the GeForce 9400 GT 256MB in general, due to its higher bandwidth. (explain)

Radeon R9 M380		96000 MB/sec
GeForce 9400 GT 256MB		12800 MB/sec
	Difference: 83200 (650%)

Texel Rate

The Radeon R9 M380 will be a lot (about 809%) faster with regards to texture filtering than the GeForce 9400 GT 256MB. (explain)

Radeon R9 M380		40000 Mtexels/sec
GeForce 9400 GT 256MB		4400 Mtexels/sec
	Difference: 35600 (809%)

Pixel Rate

If running with a high resolution is important to you, then the Radeon R9 M380 is the winner, and very much so. (explain)

Radeon R9 M380		16000 Mpixels/sec
GeForce 9400 GT 256MB		2200 Mpixels/sec
	Difference: 13800 (627%)

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 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. In the case of DDR memory, it should be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The higher the memory bandwidth, the faster the card will be in general. It especially helps with anti-aliasing, HDR and high resolutions.

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

Pixel Rate: Pixel rate is the most pixels the graphics card could possibly record to the local memory in one second - measured in millions of pixels per second. The figure is calculated by multiplying the amount of Render Output Units by the the core clock speed. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel rate is also dependant on lots of other factors, most notably the memory bandwidth of the card - the lower the memory bandwidth is, the lower the potential to reach the maximum fill rate.