Radeon HD 4650 1GB vs Radeon R9 M395X

Intro

Compare those specifications to the Radeon R9 M395X, which uses a 28 nm design. AMD has clocked the core frequency at 723 MHz. The GDDR5 memory runs at a frequency of 1250 MHz on this particular model. It features 2048 SPUs as well as 128 Texture Address Units and 32 Rasterization Operator Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 4650 1GB		55 Watts
Radeon R9 M395X		125 Watts
	Difference: 70 Watts (127%)

Memory Bandwidth

As far as performance goes, the Radeon R9 M395X should in theory be a lot superior to the Radeon HD 4650 1GB in general. (explain)

Radeon R9 M395X		160000 MB/sec
Radeon HD 4650 1GB		22400 MB/sec
	Difference: 137600 (614%)

Texel Rate

The Radeon R9 M395X should be a lot (about 382%) better at AF than the Radeon HD 4650 1GB. (explain)

Radeon R9 M395X		92544 Mtexels/sec
Radeon HD 4650 1GB		19200 Mtexels/sec
	Difference: 73344 (382%)

Pixel Rate

If running with high levels of AA is important to you, then the Radeon R9 M395X is the winner, and very much so. (explain)

Radeon R9 M395X		23136 Mpixels/sec
Radeon HD 4650 1GB		4800 Mpixels/sec
	Difference: 18336 (382%)

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: Bandwidth is the largest amount of information (counted in megabytes per second) that can be transported over the external memory interface within a second. It is calculated by multiplying the bus width by the speed of its memory. In the case of DDR type memory, it should be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The higher the bandwidth is, 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 can be applied per second. This figure is worked out by multiplying the total amount of texture units of the card by the core clock 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 in one second.

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