GeForce 9800 GX2 and GeForce GT 640M - video card comparison
Passmark - benchmark score GeForce 9800 GX2 vs GeForce GT 640M
GeForce 9800 GX2
821
GeForce GT 640M
946
GeForce 9800 GX2
GeForce GT 640M
Architecture
Tesla (2006−2010)
Kepler (2012−2018)
GPU code name
G92
N13P-GS
Market segment
Desktop
Laptop
Release date
March 2008
March 2012
Bus support
-
PCI Express 2.0, PCI Express 3.0
Interface
PCIe 2.0 x16
PCIe 3.0 x16
Supplementary power connectors
6-pin & 8-pin
-
SLI options
+
-
Boost clock speed
-
645 MHz
Core clock speed
600 MHz
Up to 625 MHz
CUDA cores
256 (128 per GPU)
384
Floating-point performance
2x 384.0 gflops
480.0 gflops
Manufacturing process technology
65 nm
28 nm
Number of transistors
754 million
1,270 million
Pipelines / CUDA cores
128
384
Power consumption (TDP)
197 Watt
32 Watt
Maximum GPU temperature
105 °C
-
Texture fill rate
76.8 billion/sec
Up to 20.0 billion/sec
Memory type
GDDR3
DDR3\GDDR5
Maximum RAM amount
512 MB
2 GB
Memory bus width
512 Bit
128bit
Memory clock speed
1000 MHz
1800 - 4000 MHz
Memory bandwidth
128 (64 per GPU)
Up to 64.0 GB/s
Shared memory
-
-
Display Connectors
HDMIDual Link DVI
No outputs
Multi monitor support
+
-
HDMI
+
+
HDCP
-
+
Maximum VGA resolution
2048x1536
Up to 2048x1536
Audio input for HDMI
S/PDIF
-
DirectX
11.1 (10_0)
12 API
CUDA
+
+
OpenCL
1.1
1.1
OpenGL
2.1
4.5
Shader Model
4.0
5.1
Vulkan
N/A
1.1.126
3D Blu-Ray
-
+
Optimus
-
+