GeForce GTX 960 and GeForce 8800 GTS 640 - video card comparison
GeForce GTX 960
GeForce 8800 GTS 640
Architecture
Maxwell (2014−2018)
Tesla (2006−2010)
GPU code name
GM206
G80
Market segment
Desktop
Desktop
Release date
January 2015
November 2006
Bus support
PCI Express 3.0
-
Interface
PCIe 3.0 x16
PCIe 1.0 x16
Recommended system power (PSU)
400 Watt
-
Supplementary power connectors
1x 6-pins
1x 6-pin
SLI options
+
-
Boost clock speed
1178 MHz
-
Core clock speed
1127 MHz
513 MHz
CUDA cores
1024
-
Floating-point performance
2,413 gflops
228.1 gflops
Manufacturing process technology
28 nm
90 nm
Number of transistors
2,940 million
681 million
Pipelines / CUDA cores
1024
96
Power consumption (TDP)
120 Watt
143 Watt
Texture fill rate
72 billion/sec
24.62
Memory type
GDDR5
GDDR3
Maximum RAM amount
4 GB
640 MB
Memory bus width
128 Bit
320 Bit
Memory clock speed
7.0 GB/s
1584 MHz
Memory bandwidth
112 GB/s
63.36 GB/s
Shared memory
-
-
Display Connectors
Dual Link DVI-I, HDMI 2.0, 3x DisplayPort 1.2
2x DVI, 1x S-Video
Multi monitor support
4 displays
-
HDMI
+
-
HDCP
+
-
Maximum VGA resolution
2048x1536
-
G-SYNC support
+
-
Audio input for HDMI
Internal
-
DirectX
12 (12_1)
11.1 (10_0)
CUDA
+
+
OpenCL
1.2
1.1
OpenGL
4.4
3.3
Shader Model
6.4
4.0
Vulkan
+
N/A
GameStream
+
-
GameWorks
+
-
GeForce ShadowPlay
+
-
GPU Boost
2.0
-