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Sapphire HD 4870 X2

Graphics Processor
800 x2
40 x2
16 x2
1024 MB x2
Memory Size
Memory Type
256 bit x2
Bus Width
Sapphire HD 4870 X2 Image ATI R700 Image

Graphics Processor

GPU Name: R700
GPU Variant: R700 XT
Architecture: TeraScale
Process Size: 55 nm
Transistors: 956 million
Die Size: 256 mm²

Graphics Card

Released: Aug 12th, 2008
Production Status: End-of-life
Bus Interface: PCIe 2.0 x16
Sapphire Part #: 100251SR

Clock Speeds

GPU Clock: 700 MHz
750 MHz (+7%)
Memory Clock: 900 MHz
3600 MHz effective


Memory Size: 1024 MB x2
Memory Type: GDDR5
Memory Bus: 256 bit x2
Bandwidth: 115.2 GB/s x2

Render Config

Shading Units: 800 x2
TMUs: 40 x2
ROPs: 16 x2
Compute Units: 10 x2
Pixel Rate: 11.20 GPixel/s x2
12.00 GPixel/s x2
Texture Rate: 28.00 GTexel/s x2
30.00 GTexel/s x2
Floating-point performance: 1,120.0 GFLOPS x2
1,200.0 GFLOPS x2

Board Design

Slot Width: Dual-slot
Length: 10.5 inches
267 mm
TDP: 286 W
Outputs: 2x DVI
1x S-Video
Power Connectors: 1x 6-pin + 1x 8-pin
Board Number: B509

Graphics Features

DirectX: 10.1
OpenGL: 3.3
OpenCL: 1.0
Shader Model: 4.1


Our review database contains 79 reviews of the HD 4870 X2.

Card Notes

Also known as R700. This is a dual GPU card that features two RV770XT chips and a PCI-E lane arbiter chip made by PLX. The card features a total of 2 GB GDDR5 memory.

Other retail boards based on this design

Name GPU Clock Memory Clock Other Changes
ASUS HD 4870 X2 TOP 790 MHz 915 MHz
Gainward Rampage700 GS 750 MHz 950 MHz Triple-slot, 1x DVI 1x HDMI 1x DisplayPort 1x VGA
Gainward Rampage700 GS GLH 790 MHz 950 MHz Triple-slot, 1x DVI 1x HDMI 1x DisplayPort 1x VGA
Sapphire HD 4870 X2 750 MHz 900 MHz
Sapphire HD 4870 X2 ATOMIC 800 MHz 1000 MHz Single-slot