GeForce GT 420 vs Radeon R9 M295X

Intro

Compare all that to the Radeon R9 M295X, which comes with GPU clock speed of 750 MHz, and 4096 MB of GDDR5 memory set to run at 1375 MHz through a 256-bit bus. It also is comprised of 2048 SPUs, 128 Texture Address Units, and 32 ROPs.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GT 420		50 Watts
Radeon R9 M295X		125 Watts
	Difference: 75 Watts (150%)

Memory Bandwidth

The Radeon R9 M295X should in theory perform a lot faster than the GeForce GT 420 overall. (explain)

Radeon R9 M295X		176000 MB/sec
GeForce GT 420		28800 MB/sec
	Difference: 147200 (511%)

Texel Rate

The Radeon R9 M295X is much (approximately 1614%) better at texture filtering than the GeForce GT 420. (explain)

Radeon R9 M295X		96000 Mtexels/sec
GeForce GT 420		5600 Mtexels/sec
	Difference: 90400 (1614%)

Pixel Rate

If using a high screen resolution is important to you, then the Radeon R9 M295X is superior to the GeForce GT 420, by far. (explain)

Radeon R9 M295X		24000 Mpixels/sec
GeForce GT 420		2800 Mpixels/sec
	Difference: 21200 (757%)

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 information (in units of MB per second) that can be moved over the external memory interface in one second. It is worked out by multiplying the card's interface width by its memory clock speed. In the case of DDR memory, it must be multiplied by 2 once again. If DDR5, multiply by 4 instead. The better the card's 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 number of texture map elements (texels) that are applied per second. This is calculated 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 per second.

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