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GeForce GT 440 1.5GB vs Radeon HD 6670 (OEM)

Intro

The GeForce GT 440 1.5GB comes with a GPU core clock speed of 594 MHz, and the 1536 MB of GDDR3 memory runs at 900 MHz through a 192-bit bus. It also is comprised of 144 SPUs, 24 Texture Address Units, and 24 Raster Operation Units.

Compare those specifications to the Radeon HD 6670 (OEM), which makes use of a 40 nm design. AMD has set the core frequency at 800 MHz. The GDDR5 memory runs at a speed of 1000 MHz on this specific card. 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 440 1.5GB 56 Watts
Radeon HD 6670 (OEM) 63 Watts
Difference: 7 Watts (13%)

Memory Bandwidth

Performance-wise, the Radeon HD 6670 (OEM) should theoretically be a lot superior to the GeForce GT 440 1.5GB overall. (explain)

Radeon HD 6670 (OEM) 64000 MB/sec
GeForce GT 440 1.5GB 43200 MB/sec
Difference: 20800 (48%)

Texel Rate

The Radeon HD 6670 (OEM) should be quite a bit (more or less 35%) better at anisotropic filtering than the GeForce GT 440 1.5GB. (explain)

Radeon HD 6670 (OEM) 19200 Mtexels/sec
GeForce GT 440 1.5GB 14256 Mtexels/sec
Difference: 4944 (35%)

Pixel Rate

The GeForce GT 440 1.5GB should be much (more or less 123%) better at full screen anti-aliasing than the Radeon HD 6670 (OEM), and also capable of handling higher resolutions better. (explain)

GeForce GT 440 1.5GB 14256 Mpixels/sec
Radeon HD 6670 (OEM) 6400 Mpixels/sec
Difference: 7856 (123%)

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 440 1.5GB

Amazon.com

Radeon HD 6670 (OEM)

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 440 1.5GB Radeon HD 6670 (OEM)
Manufacturer nVidia AMD
Year October 2010 February 2011
Code Name GF106 Turks
Fab Process 40 nm 40 nm
Bus PCIe x16 PCIe 2.1 x16
Memory 1536 MB 512 MB
Core Speed 594 MHz 800 MHz
Shader Speed 1189 MHz (N/A) MHz
Memory Speed 900 MHz (1800 MHz effective) 1000 MHz (4000 MHz effective)
Unified Shaders 144 480
Texture Mapping Units 24 24
Render Output Units 24 8
Bus Type GDDR3 GDDR5
Bus Width 192-bit 128-bit
DirectX Version DirectX 11 DirectX 11
OpenGL Version OpenGL 4.1 OpenGL 4.1
Power (Max TDP) 56 watts 63 watts
Shader Model 5.0 5.0
Bandwidth 43200 MB/sec 64000 MB/sec
Texel Rate 14256 Mtexels/sec 19200 Mtexels/sec
Pixel Rate 14256 Mpixels/sec 6400 Mpixels/sec

Memory Bandwidth: Memory bandwidth is the max amount of data (measured in megabytes per second) that can be moved past the external memory interface in one second. The number is worked out by multiplying the interface width by its memory speed. In the case of DDR RAM, it must be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The higher the card's memory bandwidth, the faster the card will be in general. It especially helps with anti-aliasing, HDR and high resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that can be processed in one second. This number is worked out by multiplying the total texture units by the core clock speed of the chip. The higher 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 a second.

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics chip could possibly write to its local memory in a second - measured in millions of pixels per second. The figure is worked out by multiplying the amount of Render Output Units 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 lots of other factors, especially the memory bandwidth of the card - the lower the bandwidth is, the lower the potential to get to the maximum fill rate.

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