GeForce 940M vs Radeon HD 4670 512MB

Intro

Compare that to the Radeon HD 4670 512MB, which makes use of a 55 nm design. AMD has set the core speed at 750 MHz. The GDDR4/GDDR3/DDR3/DDR2 memory is set to run at a frequency of 1000 MHz on this particular card. It features 320(64x5) SPUs along with 32 TAUs and 8 ROPs.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Memory Bandwidth

Theoretically speaking, the Radeon HD 4670 512MB should be quite a bit faster than the GeForce 940M overall. (explain)

Radeon HD 4670 512MB		32000 MB/sec
GeForce 940M		16000 MB/sec
	Difference: 16000 (100%)

Texel Rate

The GeForce 940M is a little bit (approximately 7%) better at AF than the Radeon HD 4670 512MB. (explain)

GeForce 940M		25728 Mtexels/sec
Radeon HD 4670 512MB		24000 Mtexels/sec
	Difference: 1728 (7%)

Pixel Rate

The GeForce 940M will be a lot (more or less 43%) more effective at anti-aliasing than the Radeon HD 4670 512MB, and capable of handling higher resolutions without losing too much performance. (explain)

GeForce 940M		8576 Mpixels/sec
Radeon HD 4670 512MB		6000 Mpixels/sec
	Difference: 2576 (43%)

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 largest amount of information (in units of megabytes per second) that can be moved across the external memory interface in a second. The number is worked out by multiplying the card's interface width by its memory clock speed. If the card has DDR memory, it should be multiplied by 2 again. If DDR5, multiply by 4 instead. The higher the bandwidth is, the faster the card will be in general. It especially helps with AA, High Dynamic Range and high resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that are processed per second. This is worked out by multiplying the total number of texture units of the card by the core clock speed of the chip. The higher the texel rate, the better the 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 most pixels that the graphics chip could possibly record to its local memory per second - measured in millions of pixels per second. The figure is worked out by multiplying the number of ROPs by the the core clock speed. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel output rate also depends on lots of other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the potential to reach the max fill rate.