Mobility Radeon HD 3870 X2 and GeForce 705M - video card comparison
Mobility Radeon HD 3870 X2
GeForce 705M
Architecture
RV6xx (2007−2010)
Fermi (2010−2014)
GPU code name
M88-XT CF
GF119
Market segment
Laptop
Laptop
Release date
September 2008
June 2013
Bus support
-
PCI Express 2.0
Interface
PCIe 2.0 x16
PCIe 2.0 x16
Supplementary power connectors
-
None
Core clock speed
660 MHz
775 MHz
Floating-point performance
2x 422.4 gflops
141.7 gflops
Manufacturing process technology
55 nm
40 nm
Number of transistors
666 million
292 million
Pipelines / CUDA cores
640
48
Power consumption (TDP)
110 Watt
15 Watt
Texture fill rate
10.56
5.904
Memory type
GDDR3
DDR3
Maximum RAM amount
512 MB
1 GB
Memory bus width
256 Bit
64 Bit
Memory clock speed
850 MHz
1800 MHz
Memory bandwidth
54.4 GB/s
14.4 GB/s
Shared memory
-
-
Standard memory configuration
-
DDR3
Display Connectors
No outputs
No outputs
eDP 1.2 signal support
-
Up to 2560x1600
LVDS signal support
-
Up to 1920x1200
VGA аnalog display support
-
Up to 2048x1536
DisplayPort Multimode (DP++) support
-
Up to 2560x1600
HDCP content protection
-
+
HDMI
-
+
7.1 channel HD audio on HDMI
-
+
DirectX
10.1 (10_1)
12 API
CUDA
-
+
OpenCL
N/A
1.1
OpenGL
3.3
4.5
Shader Model
4.1
5.1
Vulkan
N/A
N/A
Blu-Ray 3D Support
-
+
H.264, VC1, MPEG2 1080p video decoder
-
+
Optimus
-
+
TrueHD and DTS-HD audio bitstreaming
-
+