AMD Radeon HD 6870 X2 vs NVIDIA B300 SXM6 AC
GPU · Specs Compare
Graphics Card
Release Date
Jul 2011
Sep 2025
Generation
Northern Islands
Server Blackwell
Type
Desktop
Desktop
Bus Interface
PCIe 2.0 x16
PCIe 6.0 x16
Clock Speeds
Memory Clock
1050 MHz
2000 MHz
Base Clock
—
1665 MHz
Boost Clock
—
2032 MHz
Memory
Memory Size
1024MB
288GB
Memory Type
GDDR5
HBM3e
Memory Bus
256bit
8192bit
Bandwidth
134.4GB/s
8.19TB/s
Render Config
Compute Units
14
—
Shading Units
1120
18944
TMUs
56
592
ROPs
32
24
L1 Cache
8 KB (per CU)
256 KB (per SM)
L2 Cache
512 KB
126 MB
SM Count
—
148
Tensor Cores
—
592
Theoretical Performance
Pixel Rate
28.80 GPixel/s
48.77 GPixel/s
Texture Rate
50.40 GTexel/s
1202.9 GTexel/s
FP32 (float)
2.016 TFLOPS
76.99 TFLOPS
FP16 (half)
—
76.99 TFLOPS
FP64 (double)
—
1202.9 GFLOPS
Graphics Processor
GPU Name
Barts
GB110
GPU Variant
Barts XT(215-0798000)
—
Architecture
TeraScale 2
Blackwell Ultra
Foundry
TSMC
TSMC
Process Size
40 nm
5 nm
Transistors
1.7 billion
208 billion
Die Size
255 mm²
1628 mm²
Board Design
TDP
300W
1100W
Suggested PSU
700 W
1500 W
Outputs
2x DVI1x HDMI 1.3a2x mini-DisplayPort 1.1
No outputs
Graphics Features
DirectX
11.2 (11_0)
N/A
OpenGL
4.4
N/A
OpenCL
1.2
3.0
Vulkan
N/A
N/A
Shader Model
5.0
N/A
CUDA
—
10.3
▲ Specs Compare
Data sourced from official specifications and benchmark tests.