Join Us On Facebook

Compare any two graphics cards:
VS

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

Intro

The GeForce GT 420 has a GPU core speed of 700 MHz, and the 2048 MB of GDDR3 RAM runs at 900 MHz through a 128-bit bus. It also is comprised of 48 Stream Processors, 8 TAUs, and 4 Raster Operation Units.

Compare those specifications to the Radeon HD 6670 (OEM) 1GB, which comes with GPU clock speed of 800 MHz, and 1024 MB of GDDR5 RAM set to run at 1000 MHz through a 128-bit bus. It also is made up of 480 Stream Processors, 24 TAUs, and 8 Raster Operation Units.

(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, in theory, should perform a lot 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 will be much (approximately 243%) more effective at 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 (approximately 129%) better at full screen anti-aliasing than the GeForce GT 420, and capable of handling higher resolutions while still performing well. (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

GeForce GT 420

Amazon.com

Radeon HD 6670 (OEM) 1GB

Amazon.com

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

Model GeForce GT 420 Radeon HD 6670 (OEM) 1GB
Manufacturer nVidia AMD
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: Bandwidth is the largest amount of data (measured in MB per second) that can be transferred over the external memory interface within a second. The number is calculated by multiplying the bus width by the speed of its memory. In the case of DDR RAM, it should be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. The higher the bandwidth is, the faster 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 are applied per second. This number is worked out by multiplying the total 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 processed in one second.

Pixel Rate: Pixel rate is the maximum amount of pixels the graphics card can possibly record to its local memory in one second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the number of Render Output Units by the the core speed of the card. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel rate also depends on lots of other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the potential to reach 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 [...]

Your email address will not be published.


You may use these HTML tags and attributes: <a href="" title=""> <abbr title=""> <acronym title=""> <b> <blockquote cite=""> <cite> <code> <del datetime=""> <em> <i> <q cite=""> <strike> <strong>

Spam Protection by WP-SpamFree