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GeForce GT 420 vs Radeon HD 6670 (OEM) 1GB

Intro

The GeForce GT 420 comes with clock speeds of 700 MHz on the GPU, and 900 MHz on the 2048 MB of GDDR3 RAM. It features 48 SPUs along with 8 TAUs and 4 ROPs.

Compare those specifications to the Radeon HD 6670 (OEM) 1GB, which makes use of a 40 nm design. ATi has set the core speed at 800 MHz. The GDDR5 memory is set to run at a frequency of 1000 MHz on this particular model. It features 480 SPUs as well as 24 Texture Address Units and 8 ROPs.

(No game benchmarks for this combination yet.)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GT 420 50 Watts
Radeon HD 6670 (OEM) 1GB 63 Watts
Difference: 13 Watts (26%)

Memory Bandwidth

The Radeon HD 6670 (OEM) 1GB should in theory be much faster than the GeForce GT 420 in general. (explain)

Radeon HD 6670 (OEM) 1GB 64000 MB/sec
GeForce GT 420 28800 MB/sec
Difference: 35200 (122%)

Texel Rate

The Radeon HD 6670 (OEM) 1GB is much (about 243%) faster with regards to AF than the GeForce GT 420. (explain)

Radeon HD 6670 (OEM) 1GB 19200 Mtexels/sec
GeForce GT 420 5600 Mtexels/sec
Difference: 13600 (243%)

Pixel Rate

The Radeon HD 6670 (OEM) 1GB is quite a bit (about 129%) more effective at FSAA than the GeForce GT 420, and also will be able to handle higher resolutions without losing too much performance. (explain)

Radeon HD 6670 (OEM) 1GB 6400 Mpixels/sec
GeForce GT 420 2800 Mpixels/sec
Difference: 3600 (129%)

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

Please note that the price comparisons are based on search keywords, and might not be the exact same card listed on this page. We have no control over the accuracy of their search results.

GeForce GT 420

Amazon.com

Other US-based stores

Radeon HD 6670 (OEM) 1GB

Amazon.com

Other US-based stores

Specifications

Model GeForce GT 420 Radeon HD 6670 (OEM) 1GB
Manufacturer nVidia ATi
Year September 2010 February 2011
Code Name GF108 Turks
Fab Process 40 nm 40 nm
Bus PCIe x16 PCIe 2.1 x16
Memory 2048 MB 1024 MB
Core Speed 700 MHz 800 MHz
Shader Speed 1400 MHz (N/A) MHz
Memory Speed 900 MHz (1800 MHz effective) 1000 MHz (4000 MHz effective)
Unified Shaders 48 480
Texture Mapping Units 8 24
Render Output Units 4 8
Bus Type GDDR3 GDDR5
Bus Width 128-bit 128-bit
DirectX Version DirectX 11 DirectX 11
OpenGL Version OpenGL 4.1 OpenGL 4.1
Power (Max TDP) 50 watts 63 watts
Shader Model 5.0 5.0
Bandwidth 28800 MB/sec 64000 MB/sec
Texel Rate 5600 Mtexels/sec 19200 Mtexels/sec
Pixel Rate 2800 Mpixels/sec 6400 Mpixels/sec

Memory Bandwidth: Memory bandwidth is the largest amount of data (in units of megabytes per second) that can be transferred past the external memory interface in a second. It is calculated by multiplying the interface width by its memory clock speed. If it uses DDR type RAM, the result should be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The better the memory bandwidth, the better the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and higher screen resolutions.

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

Comments

One Response to “GeForce GT 420 vs Radeon HD 6670 (OEM) 1GB”
[...] oder ist es die CPU, die zu schwach ist? Eine HD 6670 ist zwar nicht superschnell, allerdings (theoretisch) sehr viel schneller als deine Alte, praktisch hab ich nur die GT430 und die HD 6670 im gleichen [...]

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