Radeon HD 6450 (OEM) vs Radeon HD 6870

Intro

Compare those specs to the Radeon HD 6870, which makes use of a 40 nm design. AMD has clocked the core speed at 900 MHz. The GDDR5 RAM is set to run at a frequency of 1050 MHz on this card. It features 1120 SPUs as well as 56 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 6870		2870 points
Radeon HD 6450 (OEM)		340 points
	Difference: 2530 (744%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 6450 (OEM)		31 Watts
Radeon HD 6870		151 Watts
	Difference: 120 Watts (387%)

Memory Bandwidth

In theory, the Radeon HD 6870 should perform quite a bit faster than the Radeon HD 6450 (OEM) overall. (explain)

Radeon HD 6870		134400 MB/sec
Radeon HD 6450 (OEM)		12800 MB/sec
	Difference: 121600 (950%)

Texel Rate

The Radeon HD 6870 should be a lot (about 908%) better at AF than the Radeon HD 6450 (OEM). (explain)

Radeon HD 6870		50400 Mtexels/sec
Radeon HD 6450 (OEM)		5000 Mtexels/sec
	Difference: 45400 (908%)

Pixel Rate

The Radeon HD 6870 will be much (about 1052%) faster with regards to anti-aliasing than the Radeon HD 6450 (OEM), and able to handle higher screen resolutions more effectively. (explain)

Radeon HD 6870		28800 Mpixels/sec
Radeon HD 6450 (OEM)		2500 Mpixels/sec
	Difference: 26300 (1052%)

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 (measured in megabytes per second) that can be transferred over the external memory interface in one second. It is worked out by multiplying the card's bus width by its memory clock speed. If the card has DDR RAM, it should be multiplied by 2 again. If DDR5, multiply by 4 instead. The better the card's memory bandwidth, the better the card will be in general. It especially helps with anti-aliasing, HDR and high resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that can be applied per second. This number is calculated by multiplying the total number of texture units of the card by the core clock speed of the chip. The better this number, the better the graphics 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 video card can possibly record to the local memory in a second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the number of Render Output Units by the clock speed of the card. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel rate is also dependant on lots of other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the ability to get to the maximum fill rate.