AMD Radeon HD 8870 OEM vs NVIDIA B300
GPU Specs Compare
Graphics Card
Release Date
Jan 2013
Sep 2025
Generation
Sea Islands
Server Blackwell
Type
Desktop
Desktop
Bus Interface
PCIe 3.0 x16
PCIe 5.0 x16
Clock Speeds
Memory Clock
1200 MHz
2000 MHz
Base Clock
-
1665 MHz
Boost Clock
-
2032 MHz
Memory
Memory Size
2GB
144GB
Memory Type
GDDR5
HBM3e
Memory Bus
256bit
4096bit
Bandwidth
153.6GB/s
4.10TB/s
Render Config
Compute Units
20
-
Shading Units
1280
18944
TMUs
80
592
ROPs
32
24
L1 Cache
16 KB (per CU)
256 KB (per SM)
L2 Cache
512 KB
50 MB
SM Count
-
148
Tensor Cores
-
592
Theoretical Performance
Pixel Rate
32.00 GPixel/s
48.77 GPixel/s
Texture Rate
80.00 GTexel/s
1202.9 GTexel/s
FP32 (float)
2.560 TFLOPS
76.99 TFLOPS
FP64 (double)
160.0 GFLOPS
1202.9 GFLOPS
FP16 (half)
-
1231.8 TFLOPS
Graphics Processor
GPU Name
Pitcairn
GB110
GPU Variant
Pitcairn XT(215-0828047)
-
Architecture
GCN 1.0
Blackwell Ultra
Foundry
TSMC
TSMC
Process Size
28 nm
5 nm
Transistors
2.8 billion
104 billion
Die Size
212 mm²
Unknown
Board Design
TDP
175W
1400W
Suggested PSU
450 W
1800 W
Outputs
1x DVI1x HDMI 1.4a2x mini-DisplayPort 1.2
No outputs
Power Connectors
2x 6-pin
-
Graphics Features
DirectX
12 (11_1)
N/A
OpenGL
4.6
N/A
OpenCL
1.2
3.0
Vulkan
1.2
N/A
Shader Model
5.1
N/A
CUDA
-
10.3