Radeon HD 6450 (OEM) 1GB vs Radeon HD 7850

Intro

Compare that to the Radeon HD 7850, which uses a 28 nm design. AMD has clocked the core speed at 860 MHz. The GDDR5 RAM is set to run at a speed of 1200 MHz on this model. It features 1024 SPUs along with 64 TAUs and 32 Rasterization Operator Units.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 6450 (OEM) 1GB		31 Watts
Radeon HD 7850		130 Watts
	Difference: 99 Watts (319%)

Memory Bandwidth

As far as performance goes, the Radeon HD 7850 should in theory be quite a bit better than the Radeon HD 6450 (OEM) 1GB in general. (explain)

Radeon HD 7850		153600 MB/sec
Radeon HD 6450 (OEM) 1GB		28800 MB/sec
	Difference: 124800 (433%)

Texel Rate

The Radeon HD 7850 should be quite a bit (approximately 817%) better at AF than the Radeon HD 6450 (OEM) 1GB. (explain)

Radeon HD 7850		55040 Mtexels/sec
Radeon HD 6450 (OEM) 1GB		6000 Mtexels/sec
	Difference: 49040 (817%)

Pixel Rate

If running with a high resolution is important to you, then the Radeon HD 7850 is a better choice, by far. (explain)

Radeon HD 7850		27520 Mpixels/sec
Radeon HD 6450 (OEM) 1GB		3000 Mpixels/sec
	Difference: 24520 (817%)

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 information (in units of megabytes per second) that can be transported over the external memory interface in a second. It's calculated by multiplying the interface width by the speed of its memory. In the case of DDR type RAM, it must be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The better the memory bandwidth, the better the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and high resolutions.

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

Pixel Rate: Pixel rate is the most pixels the graphics card can possibly record to its local memory per second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the amount of ROPs by the the core speed of the card. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel fill rate is also dependant on lots of other factors, especially the memory bandwidth of the card - the lower the memory bandwidth is, the lower the ability to get to the maximum fill rate.