GeForce GT 420 vs Radeon R9 M375

Intro

Compare that to the Radeon R9 M375, which comes with clock speeds of 1015 MHz on the GPU, and 1100 MHz on the 4096 MB of DDR3 memory. It features 640 SPUs along with 40 TAUs and 16 ROPs.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Memory Bandwidth

Theoretically, the Radeon R9 M375 should perform a lot faster than the GeForce GT 420 in general. (explain)

Radeon R9 M375		35200 MB/sec
GeForce GT 420		28800 MB/sec
	Difference: 6400 (22%)

Texel Rate

The Radeon R9 M375 is much (about 625%) better at AF than the GeForce GT 420. (explain)

Radeon R9 M375		40600 Mtexels/sec
GeForce GT 420		5600 Mtexels/sec
	Difference: 35000 (625%)

Pixel Rate

If using lots of anti-aliasing is important to you, then the Radeon R9 M375 is superior to the GeForce GT 420, and very much so. (explain)

Radeon R9 M375		16240 Mpixels/sec
GeForce GT 420		2800 Mpixels/sec
	Difference: 13440 (480%)

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 (measured in MB per second) that can be transported over the external memory interface in a second. The number is calculated by multiplying the interface width by its memory clock speed. If the card has DDR RAM, it must be multiplied by 2 once again. If 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 processed in one second. This figure is worked out by multiplying the total texture units of the card by the core 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 per second.

Pixel Rate: Pixel rate is the maximum amount of pixels the graphics card can possibly write to its local memory per second - measured in millions of pixels per second. The number is worked out by multiplying the amount of ROPs by the the core speed of the card. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel output rate also depends on quite a few other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the potential to get to the max fill rate.