Radeon HD 6450 (OEM) vs Radeon HD 7850

Intro

Compare all of 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 particular model. It features 1024 SPUs along with 64 TAUs and 32 ROPs.

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 7850		5200 points
Radeon HD 6450 (OEM)		340 points
	Difference: 4860 (1429%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

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

Memory Bandwidth

Performance-wise, the Radeon HD 7850 should in theory be a lot better than the Radeon HD 6450 (OEM) in general. (explain)

Radeon HD 7850		153600 MB/sec
Radeon HD 6450 (OEM)		12800 MB/sec
	Difference: 140800 (1100%)

Texel Rate

The Radeon HD 7850 will be a lot (about 1001%) faster with regards to anisotropic filtering than the Radeon HD 6450 (OEM). (explain)

Radeon HD 7850		55040 Mtexels/sec
Radeon HD 6450 (OEM)		5000 Mtexels/sec
	Difference: 50040 (1001%)

Pixel Rate

The Radeon HD 7850 will be a lot (more or less 1001%) better at AA than the Radeon HD 6450 (OEM), and will be capable of handling higher resolutions without slowing down too much. (explain)

Radeon HD 7850		27520 Mpixels/sec
Radeon HD 6450 (OEM)		2500 Mpixels/sec
	Difference: 25020 (1001%)

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 data (in units of megabytes per second) that can be moved over the external memory interface within 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 higher the memory bandwidth, the faster the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and higher screen resolutions.

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

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics card could 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 colour ROPs by the the card's clock speed. 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 also depends on many other factors, most notably the memory bandwidth of the card - the lower the bandwidth is, the lower the ability to reach the maximum fill rate.