Submit Benchmarks!

Submit SSD Benchmark
Submit GPU Benchmark

Compare any two graphics cards:
VS

Radeon HD 3870 512MB vs Radeon HD 6950

Intro

The Radeon HD 3870 512MB uses a 55 nm design. AMD has set the core speed at 775 MHz. The GDDR3 RAM runs at a speed of 900 MHz on this model. It features 320(64x5) SPUs as well as 16 TAUs and 16 Rasterization Operator Units.

Compare that to the Radeon HD 6950, which has a clock frequency of 800 MHz and a GDDR5 memory speed of 1250 MHz. It also uses a 256-bit memory bus, and uses a 40 nm design. It is made up of 1408 SPUs, 88 Texture Address Units, and 32 Raster Operation Units.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 3870 512MB 106 Watts
Radeon HD 6950 200 Watts
Difference: 94 Watts (89%)

Memory Bandwidth

In theory, the Radeon HD 6950 should be 178% faster than the Radeon HD 3870 512MB in general, because of its greater data rate. (explain)

Radeon HD 6950 160000 MB/sec
Radeon HD 3870 512MB 57600 MB/sec
Difference: 102400 (178%)

Texel Rate

The Radeon HD 6950 is quite a bit (about 468%) faster with regards to anisotropic filtering than the Radeon HD 3870 512MB. (explain)

Radeon HD 6950 70400 Mtexels/sec
Radeon HD 3870 512MB 12400 Mtexels/sec
Difference: 58000 (468%)

Pixel Rate

If using a high screen resolution is important to you, then the Radeon HD 6950 is superior to the Radeon HD 3870 512MB, by a large margin. (explain)

Radeon HD 6950 25600 Mpixels/sec
Radeon HD 3870 512MB 12400 Mpixels/sec
Difference: 13200 (106%)

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

Display Prices

Hide Prices

Radeon HD 3870 512MB

Amazon.com

Check prices at:

Radeon HD 6950

Amazon.com

Check prices at:

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

Display Specifications

Hide Specifications

Model Radeon HD 3870 512MB Radeon HD 6950
Manufacturer AMD AMD
Year Nov 19, 2007 December 2010
Code Name RV670 XT Cayman Pro
Memory 512 MB 1024 MB
Core Speed 775 MHz 800 MHz
Memory Speed 1800 MHz 5000 MHz
Power (Max TDP) 106 watts 200 watts
Bandwidth 57600 MB/sec 160000 MB/sec
Texel Rate 12400 Mtexels/sec 70400 Mtexels/sec
Pixel Rate 12400 Mpixels/sec 25600 Mpixels/sec
Unified Shaders 320(64x5) 1408
Texture Mapping Units 16 88
Render Output Units 16 32
Bus Type GDDR3 GDDR5
Bus Width 256-bit 256-bit
Fab Process 55 nm 40 nm
Transistors (Unknown) million 2640 million
Bus PCIe 2.0 x16/AGP 8x PCIe x16
DirectX Version DirectX 10.1 DirectX 11
OpenGL Version OpenGL 3.0 OpenGL 4.1

Memory Bandwidth: Bandwidth is the max amount of information (counted in MB per second) that can be transported over the external memory interface within a second. It is worked out by multiplying the interface width by the speed of its memory. If the card has DDR type memory, the result should be multiplied by 2 once again. If DDR5, multiply by 4 instead. The better the memory bandwidth, 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 texture map elements (texels) that can be processed per second. This number is worked out by multiplying the total amount of texture units of the card 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 amount of pixels the video card can possibly record to its local memory per second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the amount of Render Output Units by the the core clock speed. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel output rate also depends on quite a few other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the potential to get to the max fill rate.

Display Prices

Hide Prices

Radeon HD 3870 512MB

Amazon.com

Check prices at:

Radeon HD 6950

Amazon.com

Check prices at:

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.

Comments

Be the first to leave a comment!

Your email address will not be published. Required fields are marked *


*

WordPress Anti-Spam by WP-SpamShield