GeForce GTX 980 Ti and Radeon HD 8990 OEM - video card comparison
GeForce GTX 980 Ti
Radeon HD 8990 OEM
Architecture
Maxwell (2014−2018)
GCN 1.0 (2012−2020)
GPU code name
GM200
Malta
Market segment
Desktop
Desktop
Release date
June 2015
April 2013
Bus support
PCI Express 3.0
-
Interface
PCIe 3.0 x16
PCIe 3.0 x16
Recommended system power (PSU)
600 Watt
-
Supplementary power connectors
6-pin + 8-pin
2x 8-pin
SLI options
+
-
Boost clock speed
1075 MHz
1000 MHz
Core clock speed
1000 MHz
950 MHz
CUDA cores
2816
-
Floating-point performance
6,060 gflops
2x 4,096 gflops
Manufacturing process technology
28 nm
28 nm
Number of transistors
8,000 million
4,313 million
Pipelines / CUDA cores
2816
2048
Power consumption (TDP)
250 Watt
375 Watt
Texture fill rate
176 billion/sec
128.0
Memory type
GDDR5
GDDR5
Maximum RAM amount
6 GB
3 GB
Memory bus width
384 Bit
384 Bit
Memory clock speed
7.0 GB/s
6000 MHz
Memory bandwidth
336.5 GB/s
288.0 GB/s
Shared memory
-
-
Display Connectors
Dual Link DVI-I, HDMI 2.0, 3x DisplayPort 1.2
1x DVI, 4x mini-DisplayPort
Multi monitor support
4 displays
-
HDMI
+
-
HDCP
+
-
Maximum VGA resolution
2048x1536
-
G-SYNC support
+
-
Audio input for HDMI
Internal
-
DirectX
12 (12_1)
12 (11_1)
CUDA
+
-
OpenCL
1.2
1.2
OpenGL
4.5
4.6
Shader Model
6.4
5.1
Vulkan
1.1.126
1.2.131
GameStream
+
-
GameWorks
+
-
GeForce ShadowPlay
+
-
GPU Boost
2.0
-