NVIDIA B300 SXM6 AC vs NVIDIA GeForce GTX 660 Rev. 2
GPU · Specs Compare
Graphics Card
Release Date
Sep 2025
Sep 2014
Generation
Server Blackwell
GeForce 600
Type
Desktop
Desktop
Bus Interface
PCIe 6.0 x16
PCIe 3.0 x16
Clock Speeds
Base Clock
1665 MHz
980 MHz
Boost Clock
2032 MHz
1032 MHz
Memory Clock
2000 MHz
1502 MHz
Memory
Memory Size
288GB
2GB
Memory Type
HBM3e
GDDR5
Memory Bus
8192bit
192bit
Bandwidth
8.19TB/s
144.2GB/s
Render Config
SM Count
148
—
Shading Units
18944
960
TMUs
592
80
ROPs
24
24
Tensor Cores
592
—
L1 Cache
256 KB (per SM)
16 KB (per SMX)
L2 Cache
126 MB
384 KB
Theoretical Performance
Pixel Rate
48.77 GPixel/s
20.64 GPixel/s
Texture Rate
1202.9 GTexel/s
82.56 GTexel/s
FP16 (half)
76.99 TFLOPS
—
FP32 (float)
76.99 TFLOPS
1.981 TFLOPS
FP64 (double)
1202.9 GFLOPS
82.56 GFLOPS
Graphics Processor
GPU Name
GB110
GK104
Architecture
Blackwell Ultra
Kepler
Foundry
TSMC
TSMC
Process Size
5 nm
28 nm
Transistors
208 billion
3.54 billion
Die Size
1628 mm²
294 mm²
Board Design
TDP
1100W
140W
Suggested PSU
1500 W
300 W
Outputs
No outputs
2x DVI1x HDMI 1.4a1x DisplayPort 1.2
Power Connectors
—
1x 6-pin
Graphics Features
DirectX
N/A
12 (11_0)
OpenGL
N/A
4.6
OpenCL
3.0
3.0
Vulkan
N/A
1.1
CUDA
10.3
3.0
Shader Model
N/A
5.1
▲ Specs Compare
Data sourced from official specifications and benchmark tests.