GeForce 8400 GS 512MB vs Radeon HD 5770

Intro

Compare that to the Radeon HD 5770, which features core speeds of 850 MHz on the GPU, and 1200 MHz on the 1024 MB of GDDR5 memory. It features 800(160x5) SPUs as well as 40 TAUs and 16 ROPs.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce 8400 GS 512MB		40 Watts
Radeon HD 5770		108 Watts
	Difference: 68 Watts (170%)

Memory Bandwidth

Performance-wise, the Radeon HD 5770 should theoretically be a lot better than the GeForce 8400 GS 512MB in general. (explain)

Radeon HD 5770		76800 MB/sec
GeForce 8400 GS 512MB		6400 MB/sec
	Difference: 70400 (1100%)

Texel Rate

The Radeon HD 5770 should be a lot (about 554%) better at texture filtering than the GeForce 8400 GS 512MB. (explain)

Radeon HD 5770		34000 Mtexels/sec
GeForce 8400 GS 512MB		5200 Mtexels/sec
	Difference: 28800 (554%)

Pixel Rate

The Radeon HD 5770 will be quite a bit (approximately 423%) faster with regards to anti-aliasing than the GeForce 8400 GS 512MB, and also capable of handling higher screen resolutions without slowing down too much. (explain)

Radeon HD 5770		13600 Mpixels/sec
GeForce 8400 GS 512MB		2600 Mpixels/sec
	Difference: 11000 (423%)

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 (counted in MB per second) that can be transferred past the external memory interface in one second. It is calculated by multiplying the interface width by its memory speed. If the card has DDR memory, the result should be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The higher the bandwidth is, 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 amount of texture map elements (texels) that are applied per second. This figure is calculated by multiplying the total texture units by the core clock speed of the chip. The higher the texel rate, the better the graphics card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels in a second.

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics card can possibly record to its local memory in one second - measured in millions of pixels per second. The number is calculated by multiplying the amount of colour ROPs by the the core clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel output rate is also dependant on quite a few other factors, most notably the memory bandwidth of the card - the lower the bandwidth is, the lower the ability to get to the maximum fill rate.