Radeon HD 6450 (OEM) vs Radeon HD 7950

Intro

Compare those specs to the Radeon HD 7950, which makes use of a 28 nm design. AMD has set the core speed at 800 MHz. The GDDR5 RAM works at a speed of 1250 MHz on this specific model. It features 1792 SPUs as well as 112 Texture Address Units and 32 Rasterization Operator Units.

Display Graphs

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Benchmarks

These are real-world performance benchmarks that were submitted by Hardware Compare users. The scores seen here are the average of all benchmarks submitted for each respective test and hardware.

3DMark Fire Strike Graphics Score

Radeon HD 7950		7731 points
Radeon HD 6450 (OEM)		340 points
	Difference: 7391 (2174%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 6450 (OEM)		31 Watts
Radeon HD 7950		200 Watts
	Difference: 169 Watts (545%)

Memory Bandwidth

Performance-wise, the Radeon HD 7950 should in theory be much superior to the Radeon HD 6450 (OEM) in general. (explain)

Radeon HD 7950		240000 MB/sec
Radeon HD 6450 (OEM)		12800 MB/sec
	Difference: 227200 (1775%)

Texel Rate

The Radeon HD 7950 should be a lot (approximately 1692%) better at anisotropic filtering than the Radeon HD 6450 (OEM). (explain)

Radeon HD 7950		89600 Mtexels/sec
Radeon HD 6450 (OEM)		5000 Mtexels/sec
	Difference: 84600 (1692%)

Pixel Rate

The Radeon HD 7950 should be quite a bit (approximately 924%) more effective at anti-aliasing than the Radeon HD 6450 (OEM), and also should be capable of handling higher screen resolutions without losing too much performance. (explain)

Radeon HD 7950		25600 Mpixels/sec
Radeon HD 6450 (OEM)		2500 Mpixels/sec
	Difference: 23100 (924%)

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 (measured in megabytes per second) that can be transferred past the external memory interface in one second. The number is calculated by multiplying the card's bus width by the speed of its memory. In the case of DDR type memory, the result should be multiplied by 2 again. If DDR5, multiply by 4 instead. The better the memory bandwidth, the better the card will be in general. It especially helps with AA, HDR and high resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that can be applied per second. This figure is worked out by multiplying the total number of texture units by the core clock speed of the chip. The better the texel rate, the better the video card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied per second.

Pixel Rate: Pixel rate is the maximum amount of pixels the graphics card could possibly record to the local memory in a second - measured in millions of pixels per second. The figure is calculated by multiplying the amount of ROPs by the the core speed of the card. ROPs (Raster Operations Pipelines - also 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, especially the memory bandwidth of the card - the lower the memory bandwidth is, the lower the potential to get to the maximum fill rate.