GeForce 930M vs Radeon HD 4650 1GB

Intro

Compare all of that to the Radeon HD 4650 1GB, which features a core clock frequency of 600 MHz and a GDDR3 memory frequency of 700 MHz. It also uses a 128-bit memory bus, and makes use of a 55 nm design. It is comprised of 320(64x5) SPUs, 32 TAUs, and 8 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Memory Bandwidth

Theoretically speaking, the Radeon HD 4650 1GB should be much faster than the GeForce 930M in general. (explain)

Radeon HD 4650 1GB		22400 MB/sec
GeForce 930M		14400 MB/sec
	Difference: 8000 (56%)

Texel Rate

The GeForce 930M will be a little bit (approximately 16%) more effective at AF than the Radeon HD 4650 1GB. (explain)

GeForce 930M		22272 Mtexels/sec
Radeon HD 4650 1GB		19200 Mtexels/sec
	Difference: 3072 (16%)

Pixel Rate

The GeForce 930M is quite a bit (approximately 55%) better at FSAA than the Radeon HD 4650 1GB, and should be able to handle higher resolutions without losing too much performance. (explain)

GeForce 930M		7424 Mpixels/sec
Radeon HD 4650 1GB		4800 Mpixels/sec
	Difference: 2624 (55%)

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 megabytes per second) that can be transferred across the external memory interface in one second. It's calculated by multiplying the bus width by its memory clock speed. If it uses DDR type RAM, it must be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. The higher the bandwidth is, the faster the card will be in general. It especially helps with AA, HDR and higher screen resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that can be processed per second. This is calculated by multiplying the total amount of texture units of the card by the core speed of the chip. The higher the texel rate, 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 maximum number of pixels that the graphics chip can possibly write to the local memory in one second - measured in millions of pixels per second. The figure is calculated by multiplying the number of Render Output Units by the clock speed of the card. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel output rate also depends on quite a few other factors, most notably the memory bandwidth of the card - the lower the bandwidth is, the lower the potential to get to the max fill rate.