GeForce GTX 880M vs Radeon HD 4670 1GB

Intro

Compare that to the Radeon HD 4670 1GB, which comes with a clock frequency of 750 MHz and a GDDR4/GDDR3/DDR3/DDR2 memory frequency of 1100 MHz. It also makes use of 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

Power Consumption (Max TDP)

Radeon HD 4670 1GB		70 Watts
GeForce GTX 880M		130 Watts
	Difference: 60 Watts (86%)

Memory Bandwidth

Performance-wise, the GeForce GTX 880M should theoretically be quite a bit superior to the Radeon HD 4670 1GB in general. (explain)

GeForce GTX 880M		128000 MB/sec
Radeon HD 4670 1GB		35200 MB/sec
	Difference: 92800 (264%)

Texel Rate

The GeForce GTX 880M will be quite a bit (more or less 409%) faster with regards to texture filtering than the Radeon HD 4670 1GB. (explain)

GeForce GTX 880M		122112 Mtexels/sec
Radeon HD 4670 1GB		24000 Mtexels/sec
	Difference: 98112 (409%)

Pixel Rate

If using lots of anti-aliasing is important to you, then the GeForce GTX 880M is a better choice, by far. (explain)

GeForce GTX 880M		30528 Mpixels/sec
Radeon HD 4670 1GB		6000 Mpixels/sec
	Difference: 24528 (409%)

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 maximum amount of information (measured in megabytes per second) that can be transferred past the external memory interface within a second. It's calculated by multiplying the bus width by its memory speed. If the card has DDR RAM, the result should be multiplied by 2 once again. If DDR5, multiply by 4 instead. The better the memory bandwidth, the faster the card will be in general. It especially helps with AA, High Dynamic Range and higher screen resolutions.

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

Pixel Rate: Pixel rate is the maximum amount of pixels the video card could possibly record to the 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 card's clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel fill rate is also dependant on lots of other factors, especially the memory bandwidth of the card - the lower the bandwidth is, the lower the ability to reach the max fill rate.