Radeon HD 4850 1GB vs Radeon HD 6450 (OEM)

Intro

Compare all that to the Radeon HD 6450 (OEM), which uses a 40 nm design. AMD has set the core frequency at 625 MHz. The GDDR3 memory works at a speed of 800 MHz on this particular card. It features 160 SPUs as well as 8 TAUs and 4 Rasterization Operator Units.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 6450 (OEM)		31 Watts
Radeon HD 4850 1GB		110 Watts
	Difference: 79 Watts (255%)

Memory Bandwidth

The Radeon HD 4850 1GB should in theory be quite a bit faster than the Radeon HD 6450 (OEM) overall. (explain)

Radeon HD 4850 1GB		63552 MB/sec
Radeon HD 6450 (OEM)		12800 MB/sec
	Difference: 50752 (397%)

Texel Rate

The Radeon HD 4850 1GB is much (about 400%) faster with regards to anisotropic filtering than the Radeon HD 6450 (OEM). (explain)

Radeon HD 4850 1GB		25000 Mtexels/sec
Radeon HD 6450 (OEM)		5000 Mtexels/sec
	Difference: 20000 (400%)

Pixel Rate

If running with lots of anti-aliasing is important to you, then the Radeon HD 4850 1GB is a better choice, by far. (explain)

Radeon HD 4850 1GB		10000 Mpixels/sec
Radeon HD 6450 (OEM)		2500 Mpixels/sec
	Difference: 7500 (300%)

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 max amount of data (counted in MB per second) that can be transported past the external memory interface within a second. It is worked out by multiplying the card's bus width by its memory speed. If the card has DDR type RAM, the result should be multiplied by 2 once again. If DDR5, multiply by 4 instead. The higher the card's memory bandwidth, the faster 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 are applied per second. This figure is calculated by multiplying the total number of texture units of the card by the core speed of the chip. The higher the texel rate, the better the graphics 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 the graphics card can possibly write to its local memory in a 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 - also sometimes called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel fill rate also depends on lots of other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the ability to reach the maximum fill rate.