Submit Benchmarks!

Submit SSD Benchmark
Submit GPU Benchmark

Compare any two graphics cards:
VS

Radeon HD 3870 X2 1GB vs Radeon HD 5870

Intro

The Radeon HD 3870 X2 1GB uses a 55 nm design. AMD has clocked the core speed at 825 MHz. The GDDR4 RAM is set to run at a frequency of 1126 MHz on this particular model. It features 320(64x5) SPUs along with 16 Texture Address Units and 16 Rasterization Operator Units.

Compare all that to the Radeon HD 5870, which features a GPU core clock speed of 850 MHz, and 1024 MB of GDDR5 RAM running at 1200 MHz through a 256-bit bus. It also is made up of 1600(320x5) SPUs, 80 TAUs, and 32 Raster Operation Units.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Memory Bandwidth

In theory, the Radeon HD 5870 should be 7% quicker than the Radeon HD 3870 X2 1GB in general, because of its greater bandwidth. (explain)

Radeon HD 5870 153600 MB/sec
Radeon HD 3870 X2 1GB 144128 MB/sec
Difference: 9472 (7%)

Texel Rate

The Radeon HD 5870 will be much (approximately 158%) better at AF than the Radeon HD 3870 X2 1GB. (explain)

Radeon HD 5870 68000 Mtexels/sec
Radeon HD 3870 X2 1GB 26400 Mtexels/sec
Difference: 41600 (158%)

Pixel Rate

The Radeon HD 5870 will be a small bit (about 3%) more effective at FSAA than the Radeon HD 3870 X2 1GB, and able to handle higher screen resolutions without slowing down too much. (explain)

Radeon HD 5870 27200 Mpixels/sec
Radeon HD 3870 X2 1GB 26400 Mpixels/sec
Difference: 800 (3%)

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.

One or more cards in this comparison are multi-core. This means that their bandwidth, texel and pixel rates are theoretically doubled - this does not mean the card will actually perform twice as fast, but only that it should in theory be able to. Actual game benchmarks will give a more accurate idea of what it's capable of.

Price Comparison

Display Prices

Hide Prices

Radeon HD 3870 X2 1GB

Amazon.com

Check prices at:

Radeon HD 5870

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 X2 1GB Radeon HD 5870
Manufacturer AMD AMD
Year Jan 28, 2008 September 23, 2009
Code Name R680 Cypress XT
Memory 1024 MB (x2) 1024 MB
Core Speed 825 MHz (x2) 850 MHz
Memory Speed 2252 MHz (x2) 4800 MHz
Power (Max TDP) (Unknown) watts 188 watts
Bandwidth 144128 MB/sec 153600 MB/sec
Texel Rate 26400 Mtexels/sec 68000 Mtexels/sec
Pixel Rate 26400 Mpixels/sec 27200 Mpixels/sec
Unified Shaders 320(64x5) (x2) 1600(320x5)
Texture Mapping Units 16 (x2) 80
Render Output Units 16 (x2) 32
Bus Type GDDR4 GDDR5
Bus Width 256-bit (x2) 256-bit
Fab Process 55 nm 40 nm
Transistors (Unknown) million 2154 million
Bus PCIe 2.0 x16/(internal PCIe 1.1 x16) PCIe 2.1 x16
DirectX Version DirectX 10.1 DirectX 11
OpenGL Version OpenGL 3.0 OpenGL 3.2

Memory Bandwidth: Memory bandwidth is the max amount of information (measured in MB per second) that can be moved over the external memory interface in one second. The number is worked out by multiplying the interface width by its memory speed. If the card has DDR memory, it must be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The higher the memory bandwidth, the faster the card will be in general. It especially helps with AA, High Dynamic Range and high resolutions.

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

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics chip can possibly write to the local memory in a second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the amount of colour ROPs by the the core clock speed. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel rate also depends on lots of other factors, especially the memory bandwidth of the card - the lower the memory bandwidth is, the lower the ability to get to the maximum fill rate.

Display Prices

Hide Prices

Radeon HD 3870 X2 1GB

Amazon.com

Check prices at:

Radeon HD 5870

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