Radeon HD 3470 512MB vs Radeon HD 4670 1GB

Intro

Compare all that to the Radeon HD 4670 1GB, which comes with core speeds of 750 MHz on the GPU, and 1100 MHz on the 1024 MB of GDDR4/GDDR3/DDR3/DDR2 memory. It features 320(64x5) SPUs as well as 32 Texture Address Units and 8 Rasterization Operator Units.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Memory Bandwidth

The Radeon HD 4670 1GB, in theory, should perform a small bit faster than the Radeon HD 3470 512MB in general. (explain)

Radeon HD 4670 1GB		35200 MB/sec
Radeon HD 3470 512MB		30400 MB/sec
	Difference: 4800 (16%)

Texel Rate

The Radeon HD 4670 1GB is quite a bit (approximately 650%) faster with regards to texture filtering than the Radeon HD 3470 512MB. (explain)

Radeon HD 4670 1GB		24000 Mtexels/sec
Radeon HD 3470 512MB		3200 Mtexels/sec
	Difference: 20800 (650%)

Pixel Rate

The Radeon HD 4670 1GB should be a lot (approximately 88%) more effective at full screen anti-aliasing than the Radeon HD 3470 512MB, and also will be capable of handling higher resolutions while still performing well. (explain)

Radeon HD 4670 1GB		6000 Mpixels/sec
Radeon HD 3470 512MB		3200 Mpixels/sec
	Difference: 2800 (88%)

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: Bandwidth is the max amount of data (in units of MB per second) that can be transported across the external memory interface within a second. The number is calculated by multiplying the card's interface width by the speed of its memory. If it uses DDR RAM, it should be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The better the memory bandwidth, 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 applied per second. This number is calculated 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 processed in one second.

Pixel Rate: Pixel rate is the maximum amount of pixels the graphics card could possibly write to its local memory in one second - measured in millions of pixels per second. The number is calculated by multiplying the number of Render Output Units by the clock speed of the card. 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 memory bandwidth is, the lower the potential to get to the maximum fill rate.