Radeon HD 3870 1GB vs Radeon HD 5750 1GB

Intro

Compare all that to the Radeon HD 5750 1GB, which features core clock speeds of 700 MHz on the GPU, and 1150 MHz on the 1024 MB of GDDR5 RAM. It features 720(144x5) SPUs as well as 36 TAUs and 16 ROPs.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 5750 1GB		86 Watts
Radeon HD 3870 1GB		106 Watts
	Difference: 20 Watts (23%)

Memory Bandwidth

As far as performance goes, the Radeon HD 5750 1GB should in theory be a bit superior to the Radeon HD 3870 1GB overall. (explain)

Radeon HD 5750 1GB		73600 MB/sec
Radeon HD 3870 1GB		72000 MB/sec
	Difference: 1600 (2%)

Texel Rate

The Radeon HD 5750 1GB is much (approximately 103%) better at AF than the Radeon HD 3870 1GB. (explain)

Radeon HD 5750 1GB		25200 Mtexels/sec
Radeon HD 3870 1GB		12400 Mtexels/sec
	Difference: 12800 (103%)

Pixel Rate

The Radeon HD 3870 1GB is a little bit (about 11%) more effective at anti-aliasing than the Radeon HD 5750 1GB, and also will be capable of handling higher resolutions without slowing down too much. (explain)

Radeon HD 3870 1GB		12400 Mpixels/sec
Radeon HD 5750 1GB		11200 Mpixels/sec
	Difference: 1200 (11%)

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 transported across the external memory interface in one second. It is worked out by multiplying the card's bus width by its memory clock speed. If the card has DDR memory, it must be multiplied by 2 once 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 AA, High Dynamic Range and high resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that are processed in one second. This figure is calculated by multiplying the total number of texture units by the core speed of the chip. The better this number, 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 maximum amount of pixels that the graphics card could possibly record to its local memory in one second - measured in millions of pixels per second. The number is calculated by multiplying the number of colour ROPs by the the card's clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel fill rate is also dependant on lots of other factors, especially the memory bandwidth of the card - the lower the bandwidth is, the lower the ability to get to the maximum fill rate.