Radeon HD 6450 (OEM) 1GB vs Radeon HD 7750

Intro

Compare those specs to the Radeon HD 7750, which features core clock speeds of 800 MHz on the GPU, and 1125 MHz on the 1024 MB of GDDR5 RAM. It features 512 SPUs along with 32 TAUs and 16 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 7750		55 Watts
	Difference: 24 Watts (77%)

Memory Bandwidth

Performance-wise, the Radeon HD 7750 should in theory be much superior to the Radeon HD 6450 (OEM) 1GB in general. (explain)

Radeon HD 7750		72000 MB/sec
Radeon HD 6450 (OEM) 1GB		28800 MB/sec
	Difference: 43200 (150%)

Texel Rate

The Radeon HD 7750 will be much (more or less 327%) faster with regards to anisotropic filtering than the Radeon HD 6450 (OEM) 1GB. (explain)

Radeon HD 7750		25600 Mtexels/sec
Radeon HD 6450 (OEM) 1GB		6000 Mtexels/sec
	Difference: 19600 (327%)

Pixel Rate

If running with a high resolution is important to you, then the Radeon HD 7750 is a better choice, by far. (explain)

Radeon HD 7750		12800 Mpixels/sec
Radeon HD 6450 (OEM) 1GB		3000 Mpixels/sec
	Difference: 9800 (327%)

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 maximum amount of information (in units of MB per second) that can be transferred past the external memory interface in a second. It's worked out by multiplying the card's bus width by its memory speed. In the case of DDR type RAM, it should be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The better the card's memory bandwidth, the faster the card will be in general. It especially helps with anti-aliasing, HDR and higher screen resolutions.

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

Pixel Rate: Pixel rate is the maximum amount of pixels the graphics card can possibly record to the local memory per second - measured in millions of pixels per second. The number is calculated by multiplying the amount of Render Output Units by the the core clock speed. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel rate also depends on lots of other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the potential to get to the max fill rate.