Radeon HD 6450 (OEM) vs Radeon R9 M385X

Intro

Compare all of that to the Radeon R9 M385X, which has core speeds of 1100 MHz on the GPU, and 1500 MHz on the 4096 MB of GDDR5 memory. It features 896 SPUs along with 56 Texture Address Units and 16 Rasterization Operator Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Memory Bandwidth

In theory, the Radeon R9 M385X is 650% faster than the Radeon HD 6450 (OEM) overall, because of its higher data rate. (explain)

Radeon R9 M385X		96000 MB/sec
Radeon HD 6450 (OEM)		12800 MB/sec
	Difference: 83200 (650%)

Texel Rate

The Radeon R9 M385X will be quite a bit (more or less 1132%) better at texture filtering than the Radeon HD 6450 (OEM). (explain)

Radeon R9 M385X		61600 Mtexels/sec
Radeon HD 6450 (OEM)		5000 Mtexels/sec
	Difference: 56600 (1132%)

Pixel Rate

If using a high screen resolution is important to you, then the Radeon R9 M385X is a better choice, by far. (explain)

Radeon R9 M385X		17600 Mpixels/sec
Radeon HD 6450 (OEM)		2500 Mpixels/sec
	Difference: 15100 (604%)

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 max amount of information (measured in megabytes per second) that can be moved across the external memory interface within a second. It is worked out by multiplying the card's bus width by the speed of its memory. In the case of DDR memory, the result should 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 AA, High Dynamic Range and higher screen resolutions.

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

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