GeForce 9800 GTX+ vs Radeon R5 M255

Intro

Compare those specifications to the Radeon R5 M255, which has GPU core speed of 940 MHz, and 2048 MB of DDR3 memory set to run at 1000 MHz through a 64-bit bus. It also features 320 SPUs, 20 TAUs, and 8 Raster Operation Units.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Memory Bandwidth

The GeForce 9800 GTX+ should in theory be quite a bit faster than the Radeon R5 M255 overall. (explain)

GeForce 9800 GTX+		70400 MB/sec
Radeon R5 M255		16000 MB/sec
	Difference: 54400 (340%)

Texel Rate

The GeForce 9800 GTX+ will be a lot (approximately 151%) more effective at AF than the Radeon R5 M255. (explain)

GeForce 9800 GTX+		47232 Mtexels/sec
Radeon R5 M255		18800 Mtexels/sec
	Difference: 28432 (151%)

Pixel Rate

The GeForce 9800 GTX+ should be quite a bit (more or less 57%) more effective at AA than the Radeon R5 M255, and will be able to handle higher resolutions more effectively. (explain)

GeForce 9800 GTX+		11808 Mpixels/sec
Radeon R5 M255		7520 Mpixels/sec
	Difference: 4288 (57%)

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 maximum amount of information (counted in MB per second) that can be transported across the external memory interface within a second. It is calculated by multiplying the card's bus width by its memory speed. If the card has DDR type RAM, it must be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The better the memory bandwidth, the faster 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 applied per second. This is worked out by multiplying the total texture units by the core clock 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 applied in one second.

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics chip can possibly write to the local memory per second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the number of colour ROPs by the the card's clock speed. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel rate also depends on many other factors, most notably the memory bandwidth of the card - the lower the bandwidth is, the lower the ability to get to the max fill rate.