Radeon R5 4CU 756MHz GCN 2
Radeon HD 8670D
AMD Radeon R5 4CU 756MHz GCN 2 vs AMD Radeon HD 8670D Full Specs
256 Shaders 756MHz | 384 Shaders 844MHz |
Shared Memory29.9GB/sDDR3 | Shared Memory34.1GB/sDDR3 |
·· 387.1 GFLOPS | ·· 648.2 GFLOPS |
Form Factor iGPU | Form Factor iGPU |
TDP Shared | TDP Shared |
Radeon R5 4CU 756MHz GCN 2387.1 GFLOPSFP16Radeon HD 8670D648.2 GFLOPSFP32Clock Speed ·· | Clock Speed ·· |
Peak OPS 387.1 GFLOPSFP16 | Peak OPS 648.2 GFLOPSFP32 |
FP32 387.1 GFLOPS | FP32 648.2 GFLOPS |
FP64 24.19 GFLOPS | - |
Pixel Rate 6 GPixel/s | Pixel Rate 6.8 GPixel/s |
Texture Rate 12.1 GTexel/s | Texture Rate 20.3 GTexel/s |
Shaders 256 Shaders | Shaders 384 Shaders |
TMUs 16 TMUs | TMUs 24 TMUs |
ROPs 8 ROPs | ROPs 8 ROPs |
CUs 4 CUs | CUs 6 CUs |
Boost Clock 756MHz | Boost Clock 844MHz |
L1 16KB/CU | L1 8KB/CU |
L2 Cache 128KB shared | L2 Cache 256KB shared |
Shared MemoryDDR3 | Shared MemoryDDR3 |
Memory Bus 128-bit | Memory Bus 128-bit |
Memory Speed 1.9GT/s | Memory Speed 2.1GT/s |
Memory Bandwidth 29.9GB/s | Memory Bandwidth 34.1GB/s |
ECC No | ECC No |
Max Resolution 4096x2160 | Max Resolution 2560x1600 |
Refresh Rate Calculator 3840x2160 Resolution4K UHD Refresh Rate 64Hz | Refresh Rate Calculator 2560x1440 Resolution1440p QHD Refresh Rate 66Hz |
Multi-Monitor 3 | Multi-Monitor 2 |
DSC Not Supported | DSC Not Supported |
Shader Model 6.5 | Shader Model 5 |
DirectX DirectX 12Direct3D 12_0 | DirectX DirectX 11Direct3D 11_0 |
OpenGL 4.6OpenCL 2.1Vulkan 1.2 | OpenGL 4.5OpenCL 1.2Vulkan - |
GFX 7 | GFX 5 |
Encoder VCE 2.0 | - |
Codec AVC (H.264) | Codec - |
Decoder UVD 4.2 | Decoder UVD 3.1 |
Codec MPEG-1 MPEG-2 MPEG-4 VC-1 AVC (H.264) | Codec MPEG-1 MPEG-2 MPEG-4 VC-1 AVC (H.264) |
Form Factor iGPU | Form Factor iGPU |
Manufacturer | Manufacturer |
Chip Designer | Chip Designer |
Architecture | Architecture |
Family | Family |
Branding  | Branding |
Codename Spectre | Codename Devastator |
Chip Variant Spectre SL | Chip Variant - |
Market Segment Laptop | Market Segment Laptop |
Release Date Jul 31, 2014 | Release Date May 23, 2013 |
Foundry GlobalFoundries | Foundry GlobalFoundries |
Fabrication Node 28nm | Fabrication Node 32nm |
Die Size 245mm² | Die Size 246mm² |
Transistor Count 2.4B | Transistor Count 1.3B |
Transistor Density 10 MTr/mm² | Transistor Density 5 MTr/mm² |