Radeon HD 3850 256MB vs Radeon HD 6450 (OEM) 1GB

Intro

Compare all that to the Radeon HD 6450 (OEM) 1GB, which comes with a clock speed of 750 MHz and a GDDR5 memory speed of 900 MHz. It also makes use of a 64-bit memory bus, and uses a 40 nm design. It is made up of 160 SPUs, 8 TAUs, and 4 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 6450 (OEM) 1GB		31 Watts
Radeon HD 3850 256MB		75 Watts
	Difference: 44 Watts (142%)

Memory Bandwidth

Theoretically speaking, the Radeon HD 3850 256MB should perform much faster than the Radeon HD 6450 (OEM) 1GB in general. (explain)

Radeon HD 3850 256MB		52992 MB/sec
Radeon HD 6450 (OEM) 1GB		28800 MB/sec
	Difference: 24192 (84%)

Texel Rate

The Radeon HD 3850 256MB is a lot (approximately 78%) better at AF than the Radeon HD 6450 (OEM) 1GB. (explain)

Radeon HD 3850 256MB		10688 Mtexels/sec
Radeon HD 6450 (OEM) 1GB		6000 Mtexels/sec
	Difference: 4688 (78%)

Pixel Rate

The Radeon HD 3850 256MB should be a lot (approximately 256%) more effective at FSAA than the Radeon HD 6450 (OEM) 1GB, and will be capable of handling higher screen resolutions more effectively. (explain)

Radeon HD 3850 256MB		10688 Mpixels/sec
Radeon HD 6450 (OEM) 1GB		3000 Mpixels/sec
	Difference: 7688 (256%)

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 largest amount of data (measured in MB per second) that can be moved over the external memory interface within a second. It's worked out by multiplying the card's interface width by its memory clock speed. If the card has DDR RAM, it should be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The higher the bandwidth is, the faster the card will be in general. It especially helps with anti-aliasing, HDR and high resolutions.

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

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics card can possibly write to the local memory in one second - measured in millions of pixels per second. The number is calculated by multiplying the number of Render Output Units by the the core speed of the card. ROPs (Raster Operations Pipelines - also sometimes called 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 potential to get to the maximum fill rate.