GeForce 8400 GS 512MB vs Radeon R7 260X

Intro

Compare those specs to the Radeon R7 260X, which features a core clock speed of 1100 MHz and a GDDR5 memory speed of 1625 MHz. It also features a 128-bit memory bus, and makes use of a 28 nm design. It features 896 SPUs, 56 Texture Address Units, and 16 Raster Operation Units.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce 8400 GS 512MB		40 Watts
Radeon R7 260X		115 Watts
	Difference: 75 Watts (188%)

Memory Bandwidth

As far as performance goes, the Radeon R7 260X should theoretically be much better than the GeForce 8400 GS 512MB in general. (explain)

Radeon R7 260X		104000 MB/sec
GeForce 8400 GS 512MB		6400 MB/sec
	Difference: 97600 (1525%)

Texel Rate

The Radeon R7 260X should be quite a bit (about 1085%) more effective at texture filtering than the GeForce 8400 GS 512MB. (explain)

Radeon R7 260X		61600 Mtexels/sec
GeForce 8400 GS 512MB		5200 Mtexels/sec
	Difference: 56400 (1085%)

Pixel Rate

If running with high levels of AA is important to you, then the Radeon R7 260X is the winner, by a large margin. (explain)

Radeon R7 260X		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: Bandwidth is the max amount of data (in units of megabytes per second) that can be transported across the external memory interface within a second. It's calculated by multiplying the interface width by its memory clock speed. In the case of DDR RAM, 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 AA, High Dynamic Range and high resolutions.

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

Pixel Rate: Pixel rate is the maximum number of pixels the video card could possibly record to the local memory in one second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the number of colour ROPs by the the core 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 output rate also depends on quite a few other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the potential to get to the max fill rate.