GeForce GT 450 (OEM) vs Radeon HD 4670 1GB

Intro

Compare those specs to the Radeon HD 4670 1GB, which has GPU core speed of 750 MHz, and 1024 MB of GDDR4/GDDR3/DDR3/DDR2 RAM running at 1100 MHz through a 128-bit bus. It also features 320(64x5) SPUs, 32 Texture Address Units, 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 GT 450 (OEM)		106 Watts
	Difference: 36 Watts (51%)

Memory Bandwidth

Theoretically, the GeForce GT 450 (OEM) should perform quite a bit faster than the Radeon HD 4670 1GB overall. (explain)

GeForce GT 450 (OEM)		96000 MB/sec
Radeon HD 4670 1GB		35200 MB/sec
	Difference: 60800 (173%)

Texel Rate

The Radeon HD 4670 1GB will be much (approximately 27%) faster with regards to anisotropic filtering than the GeForce GT 450 (OEM). (explain)

Radeon HD 4670 1GB		24000 Mtexels/sec
GeForce GT 450 (OEM)		18960 Mtexels/sec
	Difference: 5040 (27%)

Pixel Rate

The GeForce GT 450 (OEM) should be much (about 216%) more effective at full screen anti-aliasing than the Radeon HD 4670 1GB, and capable of handling higher resolutions while still performing well. (explain)

GeForce GT 450 (OEM)		18960 Mpixels/sec
Radeon HD 4670 1GB		6000 Mpixels/sec
	Difference: 12960 (216%)

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 data (in units of MB per second) that can be transferred past the external memory interface in one second. The number is calculated by multiplying the card's interface width by its memory clock speed. In the case of DDR memory, it must be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The better the memory bandwidth, the faster the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and high resolutions.

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

Pixel Rate: Pixel rate is the most pixels that the graphics chip can possibly write to the local memory in a second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the amount of colour ROPs by the the core clock speed. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel fill rate also depends on quite a few other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the ability to reach the max fill rate.