GeForce GT 450 (OEM) vs Radeon HD 4670 512MB

Intro

Compare that to the Radeon HD 4670 512MB, which features core speeds of 750 MHz on the GPU, and 1000 MHz on the 512 MB of GDDR4/GDDR3/DDR3/DDR2 RAM. It features 320(64x5) SPUs as well as 32 Texture Address Units and 8 Rasterization Operator Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 4670 512MB		70 Watts
GeForce GT 450 (OEM)		106 Watts
	Difference: 36 Watts (51%)

Memory Bandwidth

Performance-wise, the GeForce GT 450 (OEM) should theoretically be much better than the Radeon HD 4670 512MB in general. (explain)

GeForce GT 450 (OEM)		96000 MB/sec
Radeon HD 4670 512MB		32000 MB/sec
	Difference: 64000 (200%)

Texel Rate

The Radeon HD 4670 512MB should be a lot (approximately 27%) faster with regards to AF than the GeForce GT 450 (OEM). (explain)

Radeon HD 4670 512MB		24000 Mtexels/sec
GeForce GT 450 (OEM)		18960 Mtexels/sec
	Difference: 5040 (27%)

Pixel Rate

If running with a high screen resolution is important to you, then the GeForce GT 450 (OEM) is superior to the Radeon HD 4670 512MB, by a large margin. (explain)

GeForce GT 450 (OEM)		18960 Mpixels/sec
Radeon HD 4670 512MB		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: Bandwidth is the maximum amount of data (counted in MB per second) that can be moved across the external memory interface in one second. The number is worked out by multiplying the bus width by its memory clock speed. If the card has DDR RAM, it should be multiplied by 2 again. If DDR5, multiply by 4 instead. The better the memory bandwidth, the better the card will be in general. It especially helps with AA, High Dynamic Range and high resolutions.

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

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics card could possibly record to the local memory in one second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the number of ROPs by the the core clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel output rate is also dependant on lots of other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the potential to get to the maximum fill rate.