Radeon HD 3870 X2 

Released January, 2008
  • 825 MHz
  • 1 GB GDDR3
To find the maximum overclock of our card we used a combination of AMD Internal OC Software, ATITool and our benchmarking suite.
by techPowerUp! (Jun, 2008)
Overall I would suggest the Sapphire HD 3870 X2 Atomic Edition to everybody who wants the latest and the greatest with money being of secondary interest.
by techPowerUp! (Jun, 2008)

Benchmarks Real world tests of the Radeon HD 3870 X2

PassMark Industry standard benchmark for overall graphics card performanceData courtesy Passmark

Radeon HD 3870 X2

T-Rex (GFXBench 3.0) Data courtesy CompuBench

Radeon HD 3870 X2

Cloud Gate Factor Data courtesy FutureMark

Radeon HD 3870 X2

Reviews Word on the street for the Radeon HD 3870 X2

This metal case packaging was introduced by Sapphire with the HD 3870 Atomic Edition (non-X2).

What People Are Saying Give it to me straight


One reason to wait a bit with your purchase is that this month both AMD and NVIDIA will launch their new high-end products, which will certainly have very competitive performance and pricing.
by techPowerUp! (Jun, 2008)
Unfortunately the extra performance gained from the overclocks is not as big as one would expect, but still, it's the fastest X2 card.
by techPowerUp! (Jun, 2008)
For less experienced users who do not want to go into overclocking, but have a fat wallet, this is a great choice because it gives you high performance and the bragging rights of watercooling.
by techPowerUp! (Jun, 2008)


Sapphire's card uses higher clock speeds, an extra pump and a bigger fan which causes the total power draw to increase by about 10 Watts which isn't that much.
by techPowerUp! (Jun, 2008)
Both overclocks are good, I have a feeling that additional memory overclocks would be possible if the memory on the back of the card would be cooled as well.
by techPowerUp! (Jun, 2008)
Since the memory chips on the back of the card are not cooled it is understandable that Sapphire did not go with 0.8 ns chips here.
by techPowerUp! (Jun, 2008)


If you want the best bang for the buck, then the Sapphire card is way too expensive.
by techPowerUp! (Jun, 2008)
With the latest price drops you can almost get two aircooled HD 3870 X2s for the price of one X2 Atomic.
by techPowerUp! (Jun, 2008)


Still even about 10°C less helps improve the overclocking potential of the card.
by techPowerUp! (Jun, 2008)
This means that while overclocking memory, the chips on the back will get hotter and hotter and the ones on the front stay cool, effectively limiting the memory overclock.
by techPowerUp! (Jun, 2008)


Motherboard:Gigabyte P35C-DS3RIntel P35Memory:2x 1024MB A.DATA DDR2 1066+ CL4Harddisk:WD Raptor 740ADFD 74 GBPower Supply:OCZ GameXStream 700WSoftware:Windows XP SP2Drivers:NVIDIA: 175.16ATI: Catalyst 8.5 All video card results were obtained on this exact system with the exact same configuration.
by techPowerUp! (Jun, 2008)

Specifications Full list of technical specs


GPU brand ATI
GPU name R680
Market Desktop
Clock speed 825 MHz
Is dual GPU Yes
Reference card None

raw performance

Shading units 640
Texture mapping units 32
Render output processors 32
Compute units 8
Pixel rate 26.4 GPixel/s
Texture rate 26.4 GTexel/s
Floating-point performance 1,056 GFLOPS


Memory clock speed 901 MHz
Effective memory clock speed 1,802 MHz
Memory bus 512 bit
Memory 1,024 MB
Memory type GDDR3
Memory bandwidth 115.4 GB/s

noise and power

TDP 165W
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