GPU Comparison
GEFORCE
NVIDIA GeForce GTX 660
CORE STATE
GK106
VRAM
2 GB
CLOCK SPEED
1032 MHz
TDP
140 W
BUS WIDTH
192 bit
ARCHITECTURE
Kepler
PROCESS
28 nm
LAUNCH DATE
2012
VS
GEFORCE
RTX A400
CORE STATE
GA107
VRAM
4 GB
CLOCK SPEED
1762 MHz
TDP
50 W
BUS WIDTH
64 bit
ARCHITECTURE
Ampere
PROCESS
8 nm
LAUNCH DATE
2024
PERFORMANCE BENCHMARKS
geekbench_metal
geekbench_opencl
geekbench_vulkan
DETAILED SPECIFICATIONS
SPECIFICATION
GTX 660
RTX A400
Core Specs
Shading Units
960
768
-20.0%
Shaders
960
768
-20.0%
TMUs
80
24
-70.0%
ROPs
24
16
-33.3%
SM Count
—
6
Clocks
Base Clock
980 MHz
1417 MHz
Boost Clock
1032 MHz
1762 MHz
Memory Clock
1502 MHz
6 Gbps effective
1500 MHz
12 Gbps effective
Memory
Memory Size
2 GB
4 GB
VRAM (MB)
2,048
4,096
+100.0%
Memory Type
GDDR5
GDDR6
Memory Bus
192 bit
64 bit
Bandwidth
144.2 GB/s
96.00 GB/s
Cache
L1 Cache
16 KB (per SMX)
128 KB (per SM)
L2 Cache
384 KB
2 MB
Performance
Pixel Rate
20.64 GPixel/s
28.19 GPixel/s
Texture Rate
82.56 GTexel/s
42.29 GTexel/s
FP32 (TFLOPS)
1.981 TFLOPS
2.706 TFLOPS
FP64 (TFLOPS)
82.56 GFLOPS (1:24)
42.29 GFLOPS (1:64)
FP16 (TFLOPS)
—
2.706 TFLOPS (1:1)
AI/RT
RT Cores
—
6
Tensor Cores
—
24
Power
TDP
140 W
50 W
TDP (W)
140
50
-64.3%
Suggested PSU
300 W
250 W
Power Connectors
1x 6-pin
None
Architecture
Architecture
Kepler
Ampere
GPU Name
GK106
GA107
Generation
GeForce 600
Workstation Ampere
(Ax000)
Process Size
28 nm
8 nm
Transistors
2,540 million
8,700 million
Die Size
221 mm²
200 mm²
Foundry
TSMC
Samsung
Density
11.5M / mm²
43.5M / mm²
API Support
DirectX
12 (11_0)
12 Ultimate (12_2)
OpenGL
4.6
4.6
Vulkan
1.2.175
1.4
OpenCL
3.0
3.0
CUDA
3.0
8.6
Shader Model
6.5 (5.1)
6.8
Physical
Slot Width
Dual-slot
Single-slot
Length
241 mm
9.5 inches
163 mm
6.4 inches
Height
—
69 mm
2.7 inches
Outputs
2x DVI1x HDMI 1.4a1x DisplayPort 1.2
4x mini-DisplayPort 1.4a
Bus Interface
PCIe 3.0 x16
PCIe 4.0 x8
Other
Launch Price
229 USD
—
Production
End-of-life
Active
Predecessor
GeForce 500
Quadro Turing
Successor
GeForce 700
Workstation Ada