GeForce 8400 GS 512MB vs Radeon R9 M385X

Intro

Compare that to the Radeon R9 M385X, which has clock speeds of 1100 MHz on the GPU, and 1500 MHz on the 4096 MB of GDDR5 RAM. It features 896 SPUs as well as 56 TAUs and 16 ROPs.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Memory Bandwidth

Theoretically speaking, the Radeon R9 M385X is 1400% quicker than the GeForce 8400 GS 512MB overall, because of its higher bandwidth. (explain)

Radeon R9 M385X		96000 MB/sec
GeForce 8400 GS 512MB		6400 MB/sec
	Difference: 89600 (1400%)

Texel Rate

The Radeon R9 M385X will be quite a bit (approximately 1085%) better at AF than the GeForce 8400 GS 512MB. (explain)

Radeon R9 M385X		61600 Mtexels/sec
GeForce 8400 GS 512MB		5200 Mtexels/sec
	Difference: 56400 (1085%)

Pixel Rate

If using lots of anti-aliasing is important to you, then the Radeon R9 M385X is superior to the GeForce 8400 GS 512MB, by far. (explain)

Radeon R9 M385X		17600 Mpixels/sec
GeForce 8400 GS 512MB		2600 Mpixels/sec
	Difference: 15000 (577%)

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 largest amount of information (counted in megabytes per second) that can be transported across the external memory interface in one second. It is calculated by multiplying the card's bus width by its memory clock speed. If the card has DDR RAM, it should be multiplied by 2 again. If DDR5, multiply by 4 instead. The better the card's memory bandwidth, the better the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and higher screen resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that are processed per second. This figure is calculated by multiplying the total texture units of the card 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 in one second.

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics chip can possibly record to its local memory per second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the amount of ROPs by the clock speed of the card. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel rate also depends on many other factors, most notably the memory bandwidth of the card - the lower the memory bandwidth is, the lower the ability to get to the maximum fill rate.