GeForce 825M vs Radeon HD 5450

Intro

Compare those specs to the Radeon HD 5450, which makes use of a 40 nm design. AMD has clocked the core frequency at 650 MHz. The DDR3 RAM is set to run at a frequency of 800 MHz on this specific card. It features 80(16x5) SPUs along with 8 Texture Address Units and 4 ROPs.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 5450		19 Watts
GeForce 825M		33 Watts
	Difference: 14 Watts (74%)

Memory Bandwidth

Performance-wise, the GeForce 825M should theoretically be just a bit better than the Radeon HD 5450 in general. (explain)

GeForce 825M		14400 MB/sec
Radeon HD 5450		12800 MB/sec
	Difference: 1600 (13%)

Texel Rate

The GeForce 825M will be quite a bit (more or less 162%) more effective at anisotropic filtering than the Radeon HD 5450. (explain)

GeForce 825M		13600 Mtexels/sec
Radeon HD 5450		5200 Mtexels/sec
	Difference: 8400 (162%)

Pixel Rate

If using a high screen resolution is important to you, then the GeForce 825M is the winner, by far. (explain)

GeForce 825M		6800 Mpixels/sec
Radeon HD 5450		2600 Mpixels/sec
	Difference: 4200 (162%)

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 (counted in megabytes per second) that can be moved over the external memory interface in a second. It is worked out by multiplying the bus width by its memory clock speed. If the card has DDR RAM, it must be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. 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 are processed per second. This is worked out by multiplying the total texture units of the card by the core speed of the chip. The better this number, the better the graphics card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels in a second.

Pixel Rate: Pixel rate is the maximum amount of pixels the graphics card could possibly write to the local memory in one second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the number of colour ROPs by the clock speed of the card. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel output rate is also dependant on quite a few other factors, especially the memory bandwidth of the card - the lower the bandwidth is, the lower the ability to get to the maximum fill rate.