GeForce GT 450 (OEM) vs Radeon HD 4870 1GB

Intro

Compare those specs to the Radeon HD 4870 1GB, which makes use of a 55 nm design. AMD has clocked the core frequency at 750 MHz. The GDDR5 RAM is set to run at a speed of 900 MHz on this specific model. It features 800(160x5) SPUs along with 40 TAUs and 16 Rasterization Operator Units.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GT 450 (OEM)		106 Watts
Radeon HD 4870 1GB		150 Watts
	Difference: 44 Watts (42%)

Memory Bandwidth

Performance-wise, the Radeon HD 4870 1GB should theoretically be a small bit superior to the GeForce GT 450 (OEM) in general. (explain)

Radeon HD 4870 1GB		115200 MB/sec
GeForce GT 450 (OEM)		96000 MB/sec
	Difference: 19200 (20%)

Texel Rate

The Radeon HD 4870 1GB should be much (about 58%) better at AF than the GeForce GT 450 (OEM). (explain)

Radeon HD 4870 1GB		30000 Mtexels/sec
GeForce GT 450 (OEM)		18960 Mtexels/sec
	Difference: 11040 (58%)

Pixel Rate

The GeForce GT 450 (OEM) is much (about 58%) more effective at AA than the Radeon HD 4870 1GB, and also able to handle higher screen resolutions better. (explain)

GeForce GT 450 (OEM)		18960 Mpixels/sec
Radeon HD 4870 1GB		12000 Mpixels/sec
	Difference: 6960 (58%)

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 largest amount of data (in units of MB per second) that can be moved over the external memory interface in a second. The number is worked out by multiplying the bus width by its memory speed. In the case of DDR memory, it should be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The better the memory bandwidth, 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 amount of texture map elements (texels) that are applied in one second. This figure is calculated by multiplying the total texture units of the card by the core 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 processed in one second.

Pixel Rate: Pixel rate is the most pixels that the graphics card could possibly write to its local memory in a second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the number of Raster Operations Pipelines by the the card's clock speed. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel output rate is also dependant on quite a few other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the potential to reach the maximum fill rate.