Radeon HD 3870 

Released January, 2008
  • 825 MHz
  • 512 MB GDDR4

Both overclocks are quite slim, but look better when viewed in contrast to the HD 3870 reference clocks of.
by techPowerUp! (Mar, 2008)
X3 is a space combat/trading simulation game with beautiful graphics.
by techPowerUp! (Mar, 2008)

Features Key features of the Radeon HD 3870

memory bandwidth Rate at which data can be read from or stored in onboard memory

Radeon HD 3870
76.8 GB/s
Radeon HD 5450
6.4 GB/s
GeForce GT 8800
64.6 GB/s

pixel rate Number of pixels a graphics card can render to the screen every second

Radeon HD 3870
13.2 GPixel/s
Radeon HD 5450
2.6 GPixel/s
GeForce GT 8800
11.2 GPixel/s

texture rate Speed at which a graphics card can perform texture mapping

Radeon HD 3870
13.2 GTexel/s
GeForce GT 8800
39.2 GTexel/s
Radeon HD 5450
5.2 GTexel/s

floating point performance How fast the gpu can crunch numbers

Radeon HD 3870
Radeon HD 5450
GeForce GT 8800

shading units Subcomponents of the gpu, these run in parallel to enable fast pixel shading

Radeon HD 3870

texture mapping units Built into each gpu, these resize and rotate bitmaps for texturing scenes

Radeon HD 3870

Reviews Word on the street for the Radeon HD 3870

From Catalyst 8.3 on CrossFireX is also supported which allows you to run triple and quad CrossFire configurations.

What People Are Saying Give it to me straight


Please note that the slowest card will decide the total clock speed of your setup.
by techPowerUp! (Mar, 2008)
The memory Sapphire uses is the fastest GDDR4 blend you can find on video cards today.
by techPowerUp! (Mar, 2008)
It is slightly higher than the reference HD 3870 because of the increased clocks and slightly lower than the HD 3850 because of GDDR4's reduced power consumption.
by techPowerUp! (Mar, 2008)


Compared to the offerings from NVIDIA it does especially well in 2D/idle mode but falls behind a bit when it comes to achieving best performance per watt scores.
by techPowerUp! (Mar, 2008)
Of course all those gimmicks have a price, but if you have use for a 3DMark license, an HDMI cable and PowerDVD then the extra price of about $40 over the reference design can be easily justified.
by techPowerUp! (Mar, 2008)


To find the maximum overclock of our card we used a combination of internal AMD software, ATITool and our benchmarking suite.
by techPowerUp! (Mar, 2008)


The game world is gigantic and there is always something new to see.
by techPowerUp! (Mar, 2008)

Memory Type

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: 169.04ATI: Catalyst 7.11 In order to characterize a video card's power consumption, the whole system's mains power draw was measured.
by techPowerUp! (Mar, 2008)

Specifications Full list of technical specs


GPU brand ATI
GPU name RV670 XT
Market Desktop
Clock speed 825 MHz
Is dual GPU No
Reference card ATi Radeon HD 3870 777 MHz 512 MB

raw performance

Shading units 320
Texture mapping units 16
Render output processors 16
Compute units 4
Pixel rate 13.2 GPixel/s
Texture rate 13.2 GTexel/s
Floating-point performance 528 GFLOPS


Memory clock speed 1,200 MHz
Effective memory clock speed 2,400 MHz
Memory bus 256 bit
Memory 512 MB
Memory type GDDR4
Memory bandwidth 76.8 GB/s

noise and power

TDP 106W
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