GeForce 825M vs Radeon HD 5550

Intro

Compare that to the Radeon HD 5550, which has a clock speed of 550 MHz and a DDR2 memory speed of 400 MHz. It also features a 128-bit memory bus, and uses a 40 nm design. It features 320(64x5) SPUs, 16 Texture Address Units, and 8 Raster Operation Units.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Memory Bandwidth

Theoretically speaking, the GeForce 825M should be a little bit faster than the Radeon HD 5550 overall. (explain)

GeForce 825M		14400 MB/sec
Radeon HD 5550		12800 MB/sec
	Difference: 1600 (13%)

Texel Rate

The GeForce 825M is a lot (approximately 55%) better at AF than the Radeon HD 5550. (explain)

GeForce 825M		13600 Mtexels/sec
Radeon HD 5550		8800 Mtexels/sec
	Difference: 4800 (55%)

Pixel Rate

The GeForce 825M will be quite a bit (approximately 55%) more effective at AA than the Radeon HD 5550, and also should be capable of handling higher screen resolutions more effectively. (explain)

GeForce 825M		6800 Mpixels/sec
Radeon HD 5550		4400 Mpixels/sec
	Difference: 2400 (55%)

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 (in units of MB per second) that can be transported past the external memory interface in a second. The number is worked out by multiplying the interface width by its memory clock speed. If it uses DDR memory, the result should be multiplied by 2 once again. If DDR5, multiply by 4 instead. The higher the memory bandwidth, the better the card will be in general. It especially helps with anti-aliasing, HDR and higher screen resolutions.

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

Pixel Rate: Pixel rate is the most pixels the video card could possibly write to its local memory in one second - measured in millions of pixels per second. The number is worked out by multiplying the amount of Raster Operations Pipelines by the the core clock speed. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel output rate is also dependant on lots of other factors, most notably the memory bandwidth of the card - the lower the bandwidth is, the lower the potential to get to the max fill rate.