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Radeon HD 6670 (OEM) vs Radeon HD 6950

Intro

The Radeon HD 6670 (OEM) comes with core speeds of 800 MHz on the GPU, and 1000 MHz on the 512 MB of GDDR5 memory. It features 480 SPUs as well as 24 Texture Address Units and 8 Rasterization Operator Units.

Compare all of that to the Radeon HD 6950, which makes use of a 40 nm design. ATi has set the core frequency at 800 MHz. The GDDR5 RAM is set to run at a frequency of 1250 MHz on this specific card. It features 1408 SPUs as well as 88 Texture Address Units and 32 Rasterization Operator Units.

(No game benchmarks for this combination yet.)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 6670 (OEM) 63 Watts
Radeon HD 6950 200 Watts
Difference: 137 Watts (217%)

Memory Bandwidth

As far as performance goes, the Radeon HD 6950 should theoretically be much superior to the Radeon HD 6670 (OEM) in general. (explain)

Radeon HD 6950 160000 MB/sec
Radeon HD 6670 (OEM) 64000 MB/sec
Difference: 96000 (150%)

Texel Rate

The Radeon HD 6950 should be much (about 267%) faster with regards to AF than the Radeon HD 6670 (OEM). (explain)

Radeon HD 6950 70400 Mtexels/sec
Radeon HD 6670 (OEM) 19200 Mtexels/sec
Difference: 51200 (267%)

Pixel Rate

The Radeon HD 6950 will be much (approximately 300%) faster with regards to anti-aliasing than the Radeon HD 6670 (OEM), and should be able to handle higher resolutions without losing too much performance. (explain)

Radeon HD 6950 25600 Mpixels/sec
Radeon HD 6670 (OEM) 6400 Mpixels/sec
Difference: 19200 (300%)

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.

Radeon HD 6670 (OEM)

Amazon.com

Other US-based stores

Radeon HD 6950

Amazon.com

Other US-based stores

Specifications

Model Radeon HD 6670 (OEM) Radeon HD 6950
Manufacturer ATi ATi
Year February 2011 December 2010
Code Name Turks Cayman Pro
Fab Process 40 nm 40 nm
Bus PCIe 2.1 x16 PCIe x16
Memory 512 MB 1024 MB
Core Speed 800 MHz 800 MHz
Shader Speed N/A MHz (N/A) MHz
Memory Speed 1000 MHz (4000 MHz effective) 1250 MHz (5000 MHz effective)
Unified Shaders 480 1408
Texture Mapping Units 24 88
Render Output Units 8 32
Bus Type GDDR5 GDDR5
Bus Width 128-bit 256-bit
DirectX Version DirectX 11 DirectX 11
OpenGL Version OpenGL 4.1 OpenGL 4.1
Power (Max TDP) 63 watts 200 watts
Shader Model 5.0 5.0
Bandwidth 64000 MB/sec 160000 MB/sec
Texel Rate 19200 Mtexels/sec 70400 Mtexels/sec
Pixel Rate 6400 Mpixels/sec 25600 Mpixels/sec

Memory Bandwidth: Bandwidth is the maximum amount of data (measured in MB per second) that can be transported across the external memory interface within a second. It's worked out by multiplying the interface width by its memory clock speed. If the card has DDR memory, it must be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The higher the card's memory bandwidth, the better the card will be in general. It especially helps with AA, HDR and high resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that can be applied per second. This is worked out by multiplying the total amount of texture units by the core clock speed of the chip. The higher the texel rate, the better the card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels in a second.

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics chip can possibly write to the local memory in a second - measured in millions of pixels per second. The number is worked out by multiplying the number of ROPs by the the card's clock speed. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel fill rate is also dependant on quite a few other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the potential to get to the max fill rate.

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