GeForce 930M vs Radeon HD 4650 512MB

Intro

Compare all of that to the Radeon HD 4650 512MB, which has a core clock frequency of 600 MHz and a DDR2 memory speed of 500 MHz. It also features a 128-bit memory bus, and uses a 55 nm design. It is made up of 320(64x5) SPUs, 32 Texture Address Units, and 8 Raster Operation Units.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Memory Bandwidth

In theory, the Radeon HD 4650 512MB will be 11% faster than the GeForce 930M overall, because of its greater data rate. (explain)

Radeon HD 4650 512MB		16000 MB/sec
GeForce 930M		14400 MB/sec
	Difference: 1600 (11%)

Texel Rate

The GeForce 930M should be a bit (about 16%) more effective at anisotropic filtering than the Radeon HD 4650 512MB. (explain)

GeForce 930M		22272 Mtexels/sec
Radeon HD 4650 512MB		19200 Mtexels/sec
	Difference: 3072 (16%)

Pixel Rate

The GeForce 930M is quite a bit (about 55%) more effective at full screen anti-aliasing than the Radeon HD 4650 512MB, and will be capable of handling higher screen resolutions while still performing well. (explain)

GeForce 930M		7424 Mpixels/sec
Radeon HD 4650 512MB		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 (counted in megabytes per second) that can be moved across the external memory interface within a second. It's worked out by multiplying the bus width by its memory speed. If it uses DDR RAM, the result should be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The better the memory bandwidth, the better the card will be in general. It especially helps with AA, High Dynamic Range and high resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that can be processed in one second. This figure is worked out by multiplying the total amount of texture units by the core clock speed of the chip. The higher the texel rate, the better the graphics card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed in a second.

Pixel Rate: Pixel rate is the most pixels that the graphics card could possibly record to the local memory in one second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the amount of ROPs by the the core clock speed. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel output rate is also dependant on many 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.