Radeon HD 4650 1GB vs Radeon R9 M385X

Intro

Compare those specifications to the Radeon R9 M385X, which comes with core clock speeds of 1100 MHz on the GPU, and 1500 MHz on the 4096 MB of GDDR5 memory. It features 896 SPUs as well as 56 TAUs and 16 ROPs.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Memory Bandwidth

Theoretically speaking, the Radeon R9 M385X will be 329% faster than the Radeon HD 4650 1GB overall, due to its higher bandwidth. (explain)

Radeon R9 M385X		96000 MB/sec
Radeon HD 4650 1GB		22400 MB/sec
	Difference: 73600 (329%)

Texel Rate

The Radeon R9 M385X will be quite a bit (approximately 221%) faster with regards to texture filtering than the Radeon HD 4650 1GB. (explain)

Radeon R9 M385X		61600 Mtexels/sec
Radeon HD 4650 1GB		19200 Mtexels/sec
	Difference: 42400 (221%)

Pixel Rate

The Radeon R9 M385X should be much (more or less 267%) faster with regards to FSAA than the Radeon HD 4650 1GB, and also will be able to handle higher screen resolutions better. (explain)

Radeon R9 M385X		17600 Mpixels/sec
Radeon HD 4650 1GB		4800 Mpixels/sec
	Difference: 12800 (267%)

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 data (measured in MB per second) that can be moved across the external memory interface in a second. The number is calculated by multiplying the interface width by its memory clock speed. If the card has DDR type RAM, it must be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The higher the card's memory bandwidth, the faster the card will be in general. It especially helps with AA, HDR and high resolutions.

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

Pixel Rate: Pixel rate is the maximum amount of pixels the graphics card could possibly record to its local memory in one 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 output rate also depends on lots of other factors, most notably the memory bandwidth of the card - the lower the bandwidth is, the lower the ability to get to the maximum fill rate.