Radeon HD 3650 vs Radeon HD 4670 512MB

Intro

Compare those specs to the Radeon HD 4670 512MB, which uses a 55 nm design. AMD has clocked the core frequency at 750 MHz. The GDDR4/GDDR3/DDR3/DDR2 RAM works at a speed of 1000 MHz on this particular 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)

Radeon HD 4670 512MB		70 Watts
Radeon HD 3650		78 Watts
	Difference: 8 Watts (11%)

Memory Bandwidth

The Radeon HD 4670 512MB should theoretically be a lot faster than the Radeon HD 3650 overall. (explain)

Radeon HD 4670 512MB		32000 MB/sec
Radeon HD 3650		25600 MB/sec
	Difference: 6400 (25%)

Texel Rate

The Radeon HD 4670 512MB is quite a bit (more or less 314%) faster with regards to texture filtering than the Radeon HD 3650. (explain)

Radeon HD 4670 512MB		24000 Mtexels/sec
Radeon HD 3650		5800 Mtexels/sec
	Difference: 18200 (314%)

Pixel Rate

The Radeon HD 4670 512MB should be quite a bit (about 107%) faster with regards to FSAA than the Radeon HD 3650, and should be able to handle higher screen resolutions while still performing well. (explain)

Radeon HD 4670 512MB		6000 Mpixels/sec
Radeon HD 3650		2900 Mpixels/sec
	Difference: 3100 (107%)

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 (counted in MB per second) that can be transferred over the external memory interface within a second. It's worked out by multiplying the interface width by its memory clock speed. If it uses DDR memory, it must be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The better the bandwidth is, the better the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and higher screen resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that are applied in one 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 better the texel rate, the better the video card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels in one second.

Pixel Rate: Pixel rate is the maximum number of pixels the graphics card could possibly write to its local memory per second - measured in millions of pixels per second. The figure is worked out by multiplying the number of Raster Operations Pipelines by the the card's clock speed. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel output rate also depends on many other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the ability to reach the max fill rate.