GeForce GTX 860M and Radeon R9 255 OEM - video card comparison
GeForce GTX 860M
Radeon R9 255 OEM
Architecture
Maxwell (2014−2018)
GCN 1.0 (2012−2020)
GPU code name
N15P-GX
Cape Verde
Market segment
Laptop
Desktop
Release date
March 2014
December 2013
Bus support
PCI Express 2.0, PCI Express 3.0
-
Interface
MXM-B (3.0)
PCIe 3.0 x16
Supplementary power connectors
None
1x 6-pin
SLI options
+
-
Boost clock speed
915 MHz
930 MHz
Core clock speed
797 MHz
900 MHz
CUDA cores
1152 or 640
-
Floating-point performance
1,389 gflops
952.3 gflops
Manufacturing process technology
28 nm
28 nm
Number of transistors
1,870 million
1,500 million
Pipelines / CUDA cores
640
512
Power consumption (TDP)
75 Watt
65 Watt
Texture fill rate
43.40
29.76
Memory type
GDDR5
GDDR5
Maximum RAM amount
4 GB
2 GB
Memory bus width
128 Bit
128 Bit
Memory clock speed
Up to 2500 MHz
4600 MHz
Memory bandwidth
80.0 GB/s
73.6 GB/s
Shared memory
-
-
Standard memory configuration
GDDR5
-
Display Connectors
No outputs
No outputs
eDP 1.2 signal support
Up to 3840x2160
-
LVDS signal support
Up to 1920x1200
-
VGA аnalog display support
Up to 2048x1536
-
DisplayPort Multimode (DP++) support
Up to 3840x2160
-
HDCP content protection
+
-
HDMI
+
-
7.1 channel HD audio on HDMI
+
-
DirectX
12 (11_0)
12 (11_1)
CUDA
+
-
OpenCL
1.1
1.2
OpenGL
4.5
4.6
Shader Model
5.1
5.1
Vulkan
1.1.126
1.2.131
Ansel
+
-
H.264, VC1, MPEG2 1080p video decoder
+
-
Optimus
+
-
TrueHD and DTS-HD audio bitstreaming
+
-