Compare any two graphics cards:
VS

GeForce 8800 GT 512MB vs GeForce GT 420

Intro

The GeForce 8800 GT 512MB uses a 65 nm design. nVidia has set the core speed at 600 MHz. The GDDR3 RAM is set to run at a frequency of 900 MHz on this card. It features 112 SPUs as well as 56 TAUs and 16 ROPs.

Compare those specs to the GeForce GT 420, which comes with a core clock frequency of 700 MHz and a GDDR3 memory frequency of 900 MHz. It also features a 128-bit bus, and makes use of a 40 nm design. It is comprised of 48 SPUs, 8 TAUs, and 4 ROPs.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GT 420 50 Watts
GeForce 8800 GT 512MB 105 Watts
Difference: 55 Watts (110%)

Memory Bandwidth

Performance-wise, the GeForce 8800 GT 512MB should in theory be much better than the GeForce GT 420 overall. (explain)

GeForce 8800 GT 512MB 57600 MB/sec
GeForce GT 420 28800 MB/sec
Difference: 28800 (100%)

Texel Rate

The GeForce 8800 GT 512MB should be much (approximately 500%) more effective at texture filtering than the GeForce GT 420. (explain)

GeForce 8800 GT 512MB 33600 Mtexels/sec
GeForce GT 420 5600 Mtexels/sec
Difference: 28000 (500%)

Pixel Rate

The GeForce 8800 GT 512MB should be quite a bit (more or less 243%) faster with regards to FSAA than the GeForce GT 420, and also will be able to handle higher screen resolutions without losing too much performance. (explain)

GeForce 8800 GT 512MB 9600 Mpixels/sec
GeForce GT 420 2800 Mpixels/sec
Difference: 6800 (243%)

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

Display Prices

Hide Prices

GeForce 8800 GT 512MB

Amazon.com

Check prices at:

GeForce GT 420

Amazon.com

Check prices at:

Please note that the price comparisons are based on search keywords - sometimes it might show cards with very similar names that are not exactly the same as the one chosen in the comparison. We do try to filter out the wrong results as best we can, though.

Specifications

Display Specifications

Hide Specifications

Model GeForce 8800 GT 512MB GeForce GT 420
Manufacturer nVidia nVidia
Year Oct 2007 September 2010
Code Name G92 GF108
Memory 512 MB 2048 MB
Core Speed 600 MHz 700 MHz
Memory Speed 1800 MHz 1800 MHz
Power (Max TDP) 105 watts 50 watts
Bandwidth 57600 MB/sec 28800 MB/sec
Texel Rate 33600 Mtexels/sec 5600 Mtexels/sec
Pixel Rate 9600 Mpixels/sec 2800 Mpixels/sec
Unified Shaders 112 48
Texture Mapping Units 56 8
Render Output Units 16 4
Bus Type GDDR3 GDDR3
Bus Width 256-bit 128-bit
Fab Process 65 nm 40 nm
Transistors 754 million 585 million
Bus PCIe x16 2.0 PCIe x16
DirectX Version DirectX 10 DirectX 11
OpenGL Version OpenGL 3.0 OpenGL 4.1

Memory Bandwidth: Memory bandwidth is the largest amount of information (measured in MB per second) that can be transported over the external memory interface in one second. The number is worked out by multiplying the interface width by its memory speed. If it uses DDR type RAM, 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 high resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that are processed in one second. This number is calculated by multiplying the total number of texture units of the card by the core clock speed of the chip. The better this number, the better the video 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 most pixels that the graphics chip can possibly write to its local memory in one second - measured in millions of pixels per second. The number is calculated by multiplying the amount of Render Output Units by the the core speed of the card. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel rate also depends on many other factors, especially the memory bandwidth of the card - the lower the memory bandwidth is, the lower the ability to get to the maximum fill rate.

Display Prices

Hide Prices

GeForce 8800 GT 512MB

Amazon.com

Check prices at:

GeForce GT 420

Amazon.com

Check prices at:

Please note that the price comparisons are based on search keywords - sometimes it might show cards with very similar names that are not exactly the same as the one chosen in the comparison. We do try to filter out the wrong results as best we can, though.

Comments

Be the first to leave a comment!

Your email address will not be published. Required fields are marked *


*

WordPress Anti Spam by WP-SpamShield