GPU Comparison
GEFORCE
NVIDIA GeForce 840M
CORE STATE
GM108S
VRAM
2 GB
CLOCK SPEED
1124 MHz
TDP
33 W
BUS WIDTH
64 bit
ARCHITECTURE
Maxwell
PROCESS
28 nm
LAUNCH DATE
2014
VS
GEFORCE
GeForce GTX TITAN Z
CORE STATE
GK110B
VRAM
6 GB
CLOCK SPEED
876 MHz
TDP
375 W
BUS WIDTH
384 bit
ARCHITECTURE
Kepler
PROCESS
28 nm
LAUNCH DATE
2014
PERFORMANCE BENCHMARKS
geekbench_opencl
geekbench_vulkan
DETAILED SPECIFICATIONS
SPECIFICATION
840M
GTX TITAN Z
Core Specs
Shading Units
384
2,880
+650.0%
Shaders
384
2,880
+650.0%
TMUs
16
240
+1400.0%
ROPs
8
48
+500.0%
Clocks
Base Clock
1029 MHz
705 MHz
Boost Clock
1124 MHz
876 MHz
Memory Clock
1001 MHz
2 Gbps effective
1750 MHz
7 Gbps effective
Memory
Memory Size
2 GB
6 GB
VRAM (MB)
2,048
6,144
+200.0%
Memory Type
DDR3
GDDR5
Memory Bus
64 bit
384 bit
Bandwidth
16.02 GB/s
336.0 GB/s
Cache
L1 Cache
64 KB (per SMM)
16 KB (per SMX)
L2 Cache
1024 KB
1536 KB
Performance
Pixel Rate
8.992 GPixel/s
52.56 GPixel/s
Texture Rate
17.98 GTexel/s
210.2 GTexel/s
FP32 (TFLOPS)
863.2 GFLOPS
5.046 TFLOPS
FP64 (TFLOPS)
26.98 GFLOPS (1:32)
1.682 TFLOPS (1:3)
Power
TDP
33 W
375 W
TDP (W)
33
375
+1036.4%
Suggested PSU
—
750 W
Power Connectors
None
2x 8-pin
Architecture
Architecture
Maxwell
Kepler
GPU Name
GM108S
GK110B
Generation
GeForce 800M
GeForce 700
Process Size
28 nm
28 nm
Transistors
1,020 million
7,080 million
Die Size
77 mm²
561 mm²
Foundry
TSMC
TSMC
Density
13.2M / mm²
12.6M / mm²
API Support
DirectX
12 (11_0)
12 (11_1)
OpenGL
4.6
4.6
Vulkan
1.4
1.2.175
OpenCL
3.0
3.0
CUDA
5.0
3.5
Shader Model
6.7 (5.1)
6.5 (5.1)
Physical
Slot Width
IGP
Triple-slot
Length
—
267 mm
10.5 inches
Height
—
111 mm
4.4 inches
Outputs
Portable Device Dependent
2x DVI1x HDMI 1.4a1x DisplayPort 1.2
Bus Interface
PCIe 3.0 x8
PCIe 3.0 x16
Other
Launch Price
—
2,999 USD
Production
End-of-life
End-of-life
Predecessor
GeForce 700M
GeForce 600
Successor
GeForce 900M
GeForce 900