Compare any two graphics cards:
VS

Radeon HD 3870 512MB vs Radeon HD 6770

Intro

The Radeon HD 3870 512MB has core speeds of 775 MHz on the GPU, and 900 MHz on the 512 MB of GDDR3 RAM. It features 320(64x5) SPUs as well as 16 Texture Address Units and 16 Rasterization Operator Units.

Compare all that to the Radeon HD 6770, which comes with clock speeds of 900 MHz on the GPU, and 1050 MHz on the 512 MB of GDDR5 memory. It features 800 SPUs along with 40 TAUs and 16 Rasterization Operator Units.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 3870 512MB 106 Watts
Radeon HD 6770 108 Watts
Difference: 2 Watts (2%)

Memory Bandwidth

Performance-wise, the Radeon HD 6770 should theoretically be a bit superior to the Radeon HD 3870 512MB in general. (explain)

Radeon HD 6770 67200 MB/sec
Radeon HD 3870 512MB 57600 MB/sec
Difference: 9600 (17%)

Texel Rate

The Radeon HD 6770 will be much (more or less 190%) more effective at anisotropic filtering than the Radeon HD 3870 512MB. (explain)

Radeon HD 6770 36000 Mtexels/sec
Radeon HD 3870 512MB 12400 Mtexels/sec
Difference: 23600 (190%)

Pixel Rate

The Radeon HD 6770 should be a small bit (approximately 16%) faster with regards to full screen anti-aliasing than the Radeon HD 3870 512MB, and able to handle higher screen resolutions while still performing well. (explain)

Radeon HD 6770 14400 Mpixels/sec
Radeon HD 3870 512MB 12400 Mpixels/sec
Difference: 2000 (16%)

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 6770

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 6770
Manufacturer AMD AMD
Year Nov 19, 2007 January 2011
Code Name RV670 XT Juniper XT
Memory 512 MB 512 MB
Core Speed 775 MHz 900 MHz
Memory Speed 1800 MHz 4200 MHz
Power (Max TDP) 106 watts 108 watts
Bandwidth 57600 MB/sec 67200 MB/sec
Texel Rate 12400 Mtexels/sec 36000 Mtexels/sec
Pixel Rate 12400 Mpixels/sec 14400 Mpixels/sec
Unified Shaders 320(64x5) 800
Texture Mapping Units 16 40
Render Output Units 16 16
Bus Type GDDR3 GDDR5
Bus Width 256-bit 128-bit
Fab Process 55 nm 40 nm
Transistors (Unknown) million 1040 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: Memory bandwidth is the largest amount of data (measured in MB per second) that can be transferred across the external memory interface in a second. It's worked out by multiplying the bus width by the speed of its memory. If it uses DDR type RAM, the result should be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The better the bandwidth is, the better the card will be in general. It especially helps with anti-aliasing, HDR and higher screen resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that can be applied per second. This number is calculated 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 graphics card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed per second.

Pixel Rate: Pixel rate is the most 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 colour ROPs by the clock speed of the card. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel fill rate also depends on many other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the potential to reach the maximum fill rate.

Display Prices

Hide Prices

Radeon HD 3870 512MB

Amazon.com

Check prices at:

Radeon HD 6770

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