Radeon HD 3650 256MB vs Radeon HD 6450 (OEM) 1GB

Intro

Compare those specs to the Radeon HD 6450 (OEM) 1GB, which uses a 40 nm design. AMD has clocked the core frequency at 750 MHz. The GDDR5 RAM is set to run at a frequency of 900 MHz on this specific card. It features 160 SPUs as well as 8 TAUs and 4 Rasterization Operator Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 6450 (OEM) 1GB		31 Watts
Radeon HD 3650 256MB		78 Watts
	Difference: 47 Watts (152%)

Memory Bandwidth

The Radeon HD 6450 (OEM) 1GB should theoretically perform a small bit faster than the Radeon HD 3650 256MB in general. (explain)

Radeon HD 6450 (OEM) 1GB		28800 MB/sec
Radeon HD 3650 256MB		25600 MB/sec
	Difference: 3200 (13%)

Texel Rate

The Radeon HD 6450 (OEM) 1GB should be a bit (approximately 3%) better at AF than the Radeon HD 3650 256MB. (explain)

Radeon HD 6450 (OEM) 1GB		6000 Mtexels/sec
Radeon HD 3650 256MB		5800 Mtexels/sec
	Difference: 200 (3%)

Pixel Rate

If running with a high screen resolution is important to you, then the Radeon HD 6450 (OEM) 1GB is a better choice, but it probably won't make a huge difference. (explain)

Radeon HD 6450 (OEM) 1GB		3000 Mpixels/sec
Radeon HD 3650 256MB		2900 Mpixels/sec
	Difference: 100 (3%)

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

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics chip can possibly write to the local memory in a second - measured in millions of pixels per second. The number is worked out by multiplying the number of Raster Operations Pipelines 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 fill rate is also dependant on lots of other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the ability to get to the max fill rate.