GeForce GT 220 GDDR3 vs Radeon HD 4670 512MB

Intro

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

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GT 220 GDDR3		58 Watts
Radeon HD 4670 512MB		70 Watts
	Difference: 12 Watts (21%)

Memory Bandwidth

The GeForce GT 220 GDDR3 should theoretically perform a little bit faster than the Radeon HD 4670 512MB in general. (explain)

GeForce GT 220 GDDR3		32384 MB/sec
Radeon HD 4670 512MB		32000 MB/sec
	Difference: 384 (1%)

Texel Rate

The Radeon HD 4670 512MB will be quite a bit (approximately 140%) better at texture filtering than the GeForce GT 220 GDDR3. (explain)

Radeon HD 4670 512MB		24000 Mtexels/sec
GeForce GT 220 GDDR3		10000 Mtexels/sec
	Difference: 14000 (140%)

Pixel Rate

The Radeon HD 4670 512MB is just a bit (about 20%) faster with regards to FSAA than the GeForce GT 220 GDDR3, and should be able to handle higher resolutions without losing too much performance. (explain)

Radeon HD 4670 512MB		6000 Mpixels/sec
GeForce GT 220 GDDR3		5000 Mpixels/sec
	Difference: 1000 (20%)

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 information (in units of MB per second) that can be transported past the external memory interface in one second. The number is calculated by multiplying the card's interface width by its memory speed. If it uses DDR type RAM, it must be multiplied by 2 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 high resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that can be applied in one second. This figure is worked out by multiplying the total number of texture units of the card by the core speed of the chip. The better 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 one second.

Pixel Rate: Pixel rate is the maximum number of pixels the graphics card can possibly record to the local memory in one second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the number of Raster Operations Pipelines by the the core 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 fill rate is also dependant on quite a few other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the ability to get to the maximum fill rate.