 |
 |
|
|
|
GeForce GT 420 vs Radeon HD 6670 (OEM) 1GB
Intro
The GeForce GT 420 comes with a core clock frequency of 700 MHz and a GDDR3 memory speed of 900 MHz. It also uses a 128-bit memory bus, and uses a 40 nm design. It is comprised of 48 SPUs, 8 TAUs, and 4 ROPs.Compare that to the Radeon HD 6670 (OEM) 1GB, which features core speeds of 800 MHz on the GPU, and 1000 MHz on the 1024 MB of GDDR5 RAM. It features 480 SPUs along with 24 Texture Address Units and 8 ROPs.
Power Usage and Theoretical Benchmarks
Power Consumption (Max TDP)
| GeForce GT 420 |
|
50 Watts |
| Radeon HD 6670 (OEM) 1GB |
|
63 Watts |
|
|
Memory Bandwidth
Theoretically speaking, the Radeon HD 6670 (OEM) 1GB will be 122% quicker than the GeForce GT 420 overall, due to its greater data rate. (explain)
| Radeon HD 6670 (OEM) 1GB |
|
64000 MB/sec |
| GeForce GT 420 |
|
28800 MB/sec |
|
|
Texel Rate
The Radeon HD 6670 (OEM) 1GB is a lot (approximately 243%) better at texture filtering than the GeForce GT 420. (explain)| Radeon HD 6670 (OEM) 1GB |
|
19200 Mtexels/sec |
| GeForce GT 420 |
|
5600 Mtexels/sec |
|
|
Pixel Rate
The Radeon HD 6670 (OEM) 1GB should be quite a bit (about 129%) better at full screen anti-aliasing than the GeForce GT 420, and capable of handling higher screen resolutions without slowing down too much. (explain)| Radeon HD 6670 (OEM) 1GB |
|
6400 Mpixels/sec |
| GeForce GT 420 |
|
2800 Mpixels/sec |
|
|
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 420Amazon.com
Other US-based stores
Amazon.co.uk
Amazon.de
Amazon.fr
|
Radeon HD 6670 (OEM) 1GBAmazon.com
Other US-based stores
Amazon.co.uk
Amazon.de
Amazon.fr
|
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 maximum amount of information (in units of MB per second) that can be moved past the external memory interface in a second. The number is calculated by multiplying the interface width by the speed of its memory. If it uses DDR memory, it should be multiplied by 2 again. If it uses 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 higher screen resolutions.
Texel Rate: Texel rate is the maximum number of texture map elements (texels) that can be applied in one second. This number is calculated by multiplying the total texture units of the card by the core speed of the chip. The higher the texel rate, the better the video card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied in a second.
Pixel Rate: Pixel rate is the maximum number of pixels that the graphics card can possibly write to the local memory in one second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the amount of Raster Operations Pipelines by the the core speed of the card. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel output rate is also dependant on lots of other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the potential 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 [...]