AMD Radeon R9 M390X vs Intel Arc B770
GPU · Specs Compare
Graphics Card
Release Date
May 2015
Jan 2026
Generation
Crystal System
Battlemage
Type
Mobile
Desktop
Bus Interface
PCIe 3.0 x16
PCIe 4.0 x16
Clock Speeds
Memory Clock
1250 MHz
2000 MHz
Base Clock
—
2100 MHz
Boost Clock
—
2400 MHz
Memory
Memory Size
4GB
16GB
Memory Type
GDDR5
GDDR6
Memory Bus
256bit
256bit
Bandwidth
160.0GB/s
512.0GB/s
Render Config
Compute Units
32
—
Shading Units
2048
4096
TMUs
128
256
ROPs
32
128
L1 Cache
16 KB (per CU)
—
L2 Cache
512 KB
16 MB
RT Cores
—
32
Theoretical Performance
Pixel Rate
23.14 GPixel/s
307.2 GPixel/s
Texture Rate
92.54 GTexel/s
614.4 GTexel/s
FP16 (half)
2.961 TFLOPS
39.32 TFLOPS
FP32 (float)
2.961 TFLOPS
19.66 TFLOPS
FP64 (double)
185.1 GFLOPS
2.458 TFLOPS
Graphics Processor
GPU Name
Amethyst
BMG-G31
GPU Variant
Amethyst XT
—
Architecture
GCN 3.0
Xe2-HPG
Foundry
TSMC
TSMC
Process Size
28 nm
5 nm
Transistors
5 billion
Unknown
Die Size
366 mm²
Unknown
Board Design
TDP
75W
225W
Outputs
No outputs
1x HDMI 2.1a3x DisplayPort 2.1
Power Connectors
None
1x 6-pin + 1x 8-pin
Suggested PSU
—
550 W
Graphics Features
DirectX
12 (12_0)
12 Ultimate (12_2)
OpenGL
4.6
4.6
OpenCL
2.0
3.0
Vulkan
1.2
1.4
Shader Model
6.3
6.6
▲ Specs Compare
Data sourced from official specifications and benchmark tests.