AMD Radeon HD 8870 OEM vs Intel Arc B770
GPU Specs Compare
Graphics Card
Release Date
Jan 2013
Jan 2026
Generation
Sea Islands
Battlemage
Type
Desktop
Desktop
Bus Interface
PCIe 3.0 x16
PCIe 4.0 x16
Clock Speeds
Memory Clock
1200 MHz
2000 MHz
Base Clock
-
2100 MHz
Boost Clock
-
2400 MHz
Memory
Memory Size
2GB
16GB
Memory Type
GDDR5
GDDR6
Memory Bus
256bit
256bit
Bandwidth
153.6GB/s
512.0GB/s
Render Config
Compute Units
20
-
Shading Units
1280
4096
TMUs
80
256
ROPs
32
128
L1 Cache
16 KB (per CU)
-
L2 Cache
512 KB
16 MB
RT Cores
-
32
Theoretical Performance
Pixel Rate
32.00 GPixel/s
307.2 GPixel/s
Texture Rate
80.00 GTexel/s
614.4 GTexel/s
FP32 (float)
2.560 TFLOPS
19.66 TFLOPS
FP64 (double)
160.0 GFLOPS
2.458 TFLOPS
FP16 (half)
-
39.32 TFLOPS
Graphics Processor
GPU Name
Pitcairn
BMG-G31
GPU Variant
Pitcairn XT(215-0828047)
-
Architecture
GCN 1.0
Xe2-HPG
Foundry
TSMC
TSMC
Process Size
28 nm
5 nm
Transistors
2.8 billion
Unknown
Die Size
212 mm²
Unknown
Board Design
TDP
175W
225W
Suggested PSU
450 W
550 W
Outputs
1x DVI1x HDMI 1.4a2x mini-DisplayPort 1.2
1x HDMI 2.1a3x DisplayPort 2.1
Power Connectors
2x 6-pin
1x 6-pin + 1x 8-pin
Graphics Features
DirectX
12 (11_1)
12 Ultimate (12_2)
OpenGL
4.6
4.6
OpenCL
1.2
3.0
Vulkan
1.2
1.4
Shader Model
5.1
6.6