GeForce 9500 GT DDR2 vs GeForce GT 420

Intro

Compare all of that to the GeForce GT 420, which features GPU clock speed of 700 MHz, and 2048 MB of GDDR3 RAM running at 900 MHz through a 128-bit bus. It also features 48 Stream Processors, 8 Texture Address Units, and 4 ROPs.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Both cards have the same power consumption.

Memory Bandwidth

Theoretically, the GeForce GT 420 should be quite a bit faster than the GeForce 9500 GT DDR2 in general. (explain)

GeForce GT 420		28800 MB/sec
GeForce 9500 GT DDR2		16000 MB/sec
	Difference: 12800 (80%)

Texel Rate

The GeForce 9500 GT DDR2 is much (about 57%) more effective at AF than the GeForce GT 420. (explain)

GeForce 9500 GT DDR2		8800 Mtexels/sec
GeForce GT 420		5600 Mtexels/sec
	Difference: 3200 (57%)

Pixel Rate

If running with a high screen resolution is important to you, then the GeForce 9500 GT DDR2 is a better choice, by far. (explain)

GeForce 9500 GT DDR2		4400 Mpixels/sec
GeForce GT 420		2800 Mpixels/sec
	Difference: 1600 (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: Bandwidth is the largest amount of data (counted in MB per second) that can be transported across the external memory interface in one second. It is calculated by multiplying the bus width by the speed of its memory. If the card has DDR memory, it should be multiplied by 2 once again. If DDR5, multiply by 4 instead. The better the bandwidth is, the better the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and high resolutions.

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

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics chip could possibly record to its local memory in one second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the number of Raster Operations Pipelines by the the card's clock speed. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel fill rate is also dependant on many other factors, most notably the memory bandwidth of the card - the lower the bandwidth is, the lower the ability to reach the max fill rate.