Radeon R9 295X2 and Radeon HD 3850 X3 - video card comparison
Radeon R9 295X2
Radeon HD 3850 X3
Architecture
GCN 2.0 (2013−2017)
TeraScale (2005−2013)
GPU code name
Vesuvius
RV670
Market segment
Desktop
Desktop
Release date
April 2014
-
Bus support
PCIe 2.1 x16
-
Interface
PCIe 3.0 x16
PCIe 2.0 x16
Supplementary power connectors
2 x 8-pin
1x 8-pin
Boost clock speed
1018 MHz
-
Core clock speed
-
669 MHz
Floating-point performance
2x 5,733 gflops
-
Manufacturing process technology
28 nm
55 nm
Number of transistors
6,200 million
666 million
Pipelines / CUDA cores
2816
320
Power consumption (TDP)
500 Watt
145 Watt
Texture fill rate
179.2
10.70
Memory type
GDDR5
GDDR3
Maximum RAM amount
8 GB
512 MB
Memory bus width
512 Bit
256 Bit
Memory clock speed
1250 MHz
1700 MBps
Memory bandwidth
640 GB/s
54.4 GB/s
Display Connectors
1x DVI, 4x mini-DisplayPort
4x DVI
Eyefinity
1
-
HDMI
+
-
DisplayPort support
-
-
DirectX
DirectX® 12
10.1 (10_1)
Mantle
-
-
OpenCL
2.0
N/A
OpenGL
4.6
3.3 (full)
Shader Model6.34.1
Vulkan
+
N/A
AppAcceleration
-
-
CrossFire
1
-
DDMA audio
+
-
Enduro
-
-
FreeSync
1
-
HD3D
+
-
LiquidVR
1
-
PowerTune
-
-
TressFX
1
-
TrueAudio
-
-
UVD
+
-
ZeroCore
-
-