Join Us On Facebook

Compare any two graphics cards:
VS

Radeon HD 3870 512MB vs Radeon HD 6670 (OEM) 1GB

Intro

The Radeon HD 3870 512MB comes with core clock speeds of 775 MHz on the GPU, and 900 MHz on the 512 MB of GDDR3 memory. It features 320(64x5) SPUs as well as 16 TAUs and 16 ROPs.

Compare all of that to the Radeon HD 6670 (OEM) 1GB, which has a core clock speed of 800 MHz and a GDDR5 memory frequency of 1000 MHz. It also features a 128-bit memory bus, and makes use of a 40 nm design. It is made up of 480 SPUs, 24 TAUs, and 8 Raster Operation Units.

(No game benchmarks for this combination yet.)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 6670 (OEM) 1GB 63 Watts
Radeon HD 3870 512MB 106 Watts
Difference: 43 Watts (68%)

Memory Bandwidth

The Radeon HD 6670 (OEM) 1GB should in theory perform a small bit faster than the Radeon HD 3870 512MB overall. (explain)

Radeon HD 6670 (OEM) 1GB 64000 MB/sec
Radeon HD 3870 512MB 57600 MB/sec
Difference: 6400 (11%)

Texel Rate

The Radeon HD 6670 (OEM) 1GB should be much (approximately 55%) more effective at texture filtering than the Radeon HD 3870 512MB. (explain)

Radeon HD 6670 (OEM) 1GB 19200 Mtexels/sec
Radeon HD 3870 512MB 12400 Mtexels/sec
Difference: 6800 (55%)

Pixel Rate

The Radeon HD 3870 512MB will be a lot (about 94%) more effective at AA than the Radeon HD 6670 (OEM) 1GB, and also capable of handling higher resolutions better. (explain)

Radeon HD 3870 512MB 12400 Mpixels/sec
Radeon HD 6670 (OEM) 1GB 6400 Mpixels/sec
Difference: 6000 (94%)

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

Radeon HD 3870 512MB

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 Radeon HD 3870 512MB Radeon HD 6670 (OEM) 1GB
Manufacturer AMD AMD
Year Nov 19, 2007 February 2011
Code Name RV670 XT Turks
Fab Process 55 nm 40 nm
Bus PCIe 2.0 x16/AGP 8x PCIe 2.1 x16
Memory 512 MB 1024 MB
Core Speed 775 MHz 800 MHz
Shader Speed N/A MHz (N/A) MHz
Memory Speed 900 MHz (1800 MHz effective) 1000 MHz (4000 MHz effective)
Unified Shaders 320(64x5) 480
Texture Mapping Units 16 24
Render Output Units 16 8
Bus Type GDDR3 GDDR5
Bus Width 256-bit 128-bit
DirectX Version DirectX 10.1 DirectX 11
OpenGL Version OpenGL 3.0 OpenGL 4.1
Power (Max TDP) 106 watts 63 watts
Shader Model 4.1 5.0
Bandwidth 57600 MB/sec 64000 MB/sec
Texel Rate 12400 Mtexels/sec 19200 Mtexels/sec
Pixel Rate 12400 Mpixels/sec 6400 Mpixels/sec

Memory Bandwidth: Bandwidth is the max amount of information (in units of megabytes per second) that can be transferred over the external memory interface in one second. It's worked out by multiplying the card's bus width by the speed of its memory. If the card has DDR type memory, it must be multiplied by 2 again. If DDR5, multiply by 4 instead. The better the bandwidth is, the faster the card will be in general. It especially helps with AA, High Dynamic Range and higher screen resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that can be applied per second. This figure is calculated by multiplying the total amount of texture units of the card by the core speed of the chip. The better the texel rate, the better the 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 video card can 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 colour ROPs by the the card's clock speed. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel rate is also dependant on many other factors, especially the memory bandwidth of the card - the lower the memory bandwidth is, the lower the potential to reach the maximum fill rate.

Comments

Be the first to leave a comment!

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