GeForce 920M vs Radeon HD 5550

Intro

Compare all that to the Radeon HD 5550, which features GPU clock speed of 550 MHz, and 512 MB of DDR2 RAM set to run at 400 MHz through a 128-bit bus. It also is comprised of 320(64x5) SPUs, 16 Texture Address Units, and 8 ROPs.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Memory Bandwidth

In theory, the GeForce 920M will be 13% faster than the Radeon HD 5550 in general, because of its greater bandwidth. (explain)

GeForce 920M		14400 MB/sec
Radeon HD 5550		12800 MB/sec
	Difference: 1600 (13%)

Texel Rate

The GeForce 920M will be a lot (more or less 247%) more effective at AF than the Radeon HD 5550. (explain)

GeForce 920M		30528 Mtexels/sec
Radeon HD 5550		8800 Mtexels/sec
	Difference: 21728 (247%)

Pixel Rate

The GeForce 920M is quite a bit (about 73%) faster with regards to anti-aliasing than the Radeon HD 5550, and should be able to handle higher resolutions without losing too much performance. (explain)

GeForce 920M		7632 Mpixels/sec
Radeon HD 5550		4400 Mpixels/sec
	Difference: 3232 (73%)

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 max amount of information (in units of megabytes per second) that can be transferred past the external memory interface in a second. It's calculated by multiplying the card's interface width by the speed of its memory. If the card has DDR memory, it must be multiplied by 2 again. If 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 higher screen resolutions.

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

Pixel Rate: Pixel rate is the maximum number of pixels the video card could possibly record to the local memory in a 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 speed of the card. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel fill rate also depends on lots of other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the potential to reach the maximum fill rate.