GeForce 8400 GS 512MB vs Radeon RX 590

Intro

Compare those specifications to the Radeon RX 590, which comes with a clock speed of 1469 MHz and a GDDR5 memory frequency of 2000 MHz. It also features a 256-bit bus, and uses a 12 nm design. It is made up of 2304 SPUs, 144 Texture Address Units, and 32 ROPs.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce 8400 GS 512MB		40 Watts
Radeon RX 590		175 Watts
	Difference: 135 Watts (338%)

Memory Bandwidth

Theoretically speaking, the Radeon RX 590 will be 3996% quicker than the GeForce 8400 GS 512MB in general, due to its greater data rate. (explain)

Radeon RX 590		262144 MB/sec
GeForce 8400 GS 512MB		6400 MB/sec
	Difference: 255744 (3996%)

Texel Rate

The Radeon RX 590 is a lot (more or less 3968%) more effective at texture filtering than the GeForce 8400 GS 512MB. (explain)

Radeon RX 590		211536 Mtexels/sec
GeForce 8400 GS 512MB		5200 Mtexels/sec
	Difference: 206336 (3968%)

Pixel Rate

If running with a high resolution is important to you, then the Radeon RX 590 is superior to the GeForce 8400 GS 512MB, and very much so. (explain)

Radeon RX 590		47008 Mpixels/sec
GeForce 8400 GS 512MB		2600 Mpixels/sec
	Difference: 44408 (1708%)

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: Bandwidth is the maximum amount of data (measured in MB per second) that can be transferred past the external memory interface within a second. It is calculated by multiplying the bus width by its memory speed. In the case of DDR type memory, it should be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The higher the card's memory bandwidth, the faster 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 number of texture map elements (texels) that can be processed per second. This is worked out by multiplying the total texture units of the card by the core clock speed of the chip. The better the texel rate, the better the card will be at 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 worked out by multiplying the amount of Render Output Units by the clock speed of the card. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel fill rate is also dependant on quite a few other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the ability to get to the maximum fill rate.