AMD RX-427BB vs AMD RX-421BD

Comparative analysis of AMD RX-427BB and AMD RX-421BD processors for all known characteristics in the following categories: Essentials, Performance, Memory, Graphics, Graphics interfaces, Graphics API support, Compatibility, Peripherals, Advanced Technologies, Virtualization. Benchmark processor performance analysis: CompuBench 1.5 Desktop - Face Detection (mPixels/s), CompuBench 1.5 Desktop - Ocean Surface Simulation (Frames/s), CompuBench 1.5 Desktop - T-Rex (Frames/s), CompuBench 1.5 Desktop - Video Composition (Frames/s), CompuBench 1.5 Desktop - Bitcoin Mining (mHash/s), GFXBench 4.0 - Car Chase Offscreen (Frames), GFXBench 4.0 - Manhattan (Frames), GFXBench 4.0 - T-Rex (Frames), GFXBench 4.0 - Car Chase Offscreen (Fps), GFXBench 4.0 - Manhattan (Fps), GFXBench 4.0 - T-Rex (Fps).

AMD RX-427BB

AMD RX-421BD

Differences

Reasons to consider the AMD RX-427BB

Around 6% higher clock speed: 3600 MHz vs 3400 MHz
2x more L2 cache, more data can be stored in the L2 cache for quick access later
Around 3% better performance in CompuBench 1.5 Desktop - Face Detection (mPixels/s): 3.913 vs 3.817
Around 16% better performance in CompuBench 1.5 Desktop - Ocean Surface Simulation (Frames/s): 12.202 vs 10.518
212.8x better performance in GFXBench 4.0 - Car Chase Offscreen (Frames): 1702 vs 8
212.8x better performance in GFXBench 4.0 - Car Chase Offscreen (Fps): 1702 vs 8

Specifications (specs)
Maximum frequency	3600 MHz vs 3400 MHz
L2 cache	4 MB vs 2 MB
Benchmarks
CompuBench 1.5 Desktop - Face Detection (mPixels/s)	3.913 vs 3.817
CompuBench 1.5 Desktop - Ocean Surface Simulation (Frames/s)	12.202 vs 10.518
GFXBench 4.0 - Car Chase Offscreen (Frames)	1702 vs 8
GFXBench 4.0 - Car Chase Offscreen (Fps)	1702 vs 8

Reasons to consider the AMD RX-421BD

CPU is newer: launch date 1 year(s) 5 month(s) later
Around 25% more L1 cache; more data can be stored in the L1 cache for quick access later
Around 2% better performance in CompuBench 1.5 Desktop - T-Rex (Frames/s): 0.189 vs 0.185
Around 8% better performance in CompuBench 1.5 Desktop - Video Composition (Frames/s): 0.608 vs 0.562
Around 30% better performance in CompuBench 1.5 Desktop - Bitcoin Mining (mHash/s): 4.623 vs 3.551
Around 7% better performance in GFXBench 4.0 - Manhattan (Frames): 1942 vs 1809
Around 22% better performance in GFXBench 4.0 - T-Rex (Frames): 7025 vs 5750
Around 7% better performance in GFXBench 4.0 - Manhattan (Fps): 1942 vs 1809
Around 22% better performance in GFXBench 4.0 - T-Rex (Fps): 7025 vs 5750

Specifications (specs)
Launch date	21 October 2015 vs 20 May 2014
L1 cache	320 KB vs 256 KB
Benchmarks
CompuBench 1.5 Desktop - T-Rex (Frames/s)	0.189 vs 0.185
CompuBench 1.5 Desktop - Video Composition (Frames/s)	0.608 vs 0.562
CompuBench 1.5 Desktop - Bitcoin Mining (mHash/s)	4.623 vs 3.551
GFXBench 4.0 - Manhattan (Frames)	1942 vs 1809
GFXBench 4.0 - T-Rex (Frames)	7025 vs 5750
GFXBench 4.0 - Manhattan (Fps)	1942 vs 1809
GFXBench 4.0 - T-Rex (Fps)	7025 vs 5750

Compare benchmarks

CPU 1: AMD RX-427BB
CPU 2: AMD RX-421BD

CompuBench 1.5 Desktop - Face Detection (mPixels/s)

CPU 1

CPU 2

3.913

3.817

CompuBench 1.5 Desktop - Ocean Surface Simulation (Frames/s)

CPU 1

CPU 2

12.202

10.518

CompuBench 1.5 Desktop - T-Rex (Frames/s)

CPU 1

CPU 2

0.185

0.189

CompuBench 1.5 Desktop - Video Composition (Frames/s)

CPU 1

CPU 2

0.562

0.608

CompuBench 1.5 Desktop - Bitcoin Mining (mHash/s)

CPU 1

CPU 2

3.551

4.623

GFXBench 4.0 - Car Chase Offscreen (Frames)

CPU 1

CPU 2

1702

GFXBench 4.0 - Manhattan (Frames)

CPU 1

CPU 2

1809

1942

GFXBench 4.0 - T-Rex (Frames)

CPU 1

CPU 2

5750

7025

GFXBench 4.0 - Car Chase Offscreen (Fps)

CPU 1

CPU 2

1702

GFXBench 4.0 - Manhattan (Fps)

CPU 1

CPU 2

1809

1942

GFXBench 4.0 - T-Rex (Fps)

CPU 1

CPU 2

5750

7025

Name	AMD RX-427BB	AMD RX-421BD
CompuBench 1.5 Desktop - Face Detection (mPixels/s)	3.913	3.817
CompuBench 1.5 Desktop - Ocean Surface Simulation (Frames/s)	12.202	10.518
CompuBench 1.5 Desktop - T-Rex (Frames/s)	0.185	0.189
CompuBench 1.5 Desktop - Video Composition (Frames/s)	0.562	0.608
CompuBench 1.5 Desktop - Bitcoin Mining (mHash/s)	3.551	4.623
GFXBench 4.0 - Car Chase Offscreen (Frames)	1702	8
GFXBench 4.0 - Manhattan (Frames)	1809	1942
GFXBench 4.0 - T-Rex (Frames)	5750	7025
GFXBench 4.0 - Car Chase Offscreen (Fps)	1702	8
GFXBench 4.0 - Manhattan (Fps)	1809	1942
GFXBench 4.0 - T-Rex (Fps)	5750	7025

Compare specifications (specs)

	AMD RX-427BB	AMD RX-421BD
Essentials
Architecture codename	Bald Eagle	Merlin Falcon
Family	AMD R-Series	AMD R-Series
Launch date	20 May 2014	21 October 2015
Place in performance rating	1611	1721
Processor Number	RX-427BB	RX-421BD
Vertical segment	Embedded	Embedded
Performance
64 bit support
Base frequency	2700 MHz	2100 MHz
Die size	928 mm2	1073 mm2
L1 cache	256 KB	320 KB
L2 cache	4 MB	2 MB
Manufacturing process technology	28 nm	28 nm
Maximum frequency	3600 MHz	3400 MHz
Number of cores	4	4
Number of threads	4	4
Memory
Max memory channels	2	2
Maximum memory bandwidth	34.1 GB/s	38.4 GB/s
Supported memory types	DDR3-2133	DDR3-2133, DDR4-2400
ECC memory support
Graphics
Graphics base frequency	600 MHz	800 MHz
Graphics max frequency	686 MHz
Number of pipelines	512	512
Processor graphics	Radeon R7 Graphics	Radeon R7 series
Unified Video Decoder (UVD)
Video Codec Engine (VCE)
Graphics interfaces
Number of displays supported	4	3
DisplayPort
DVI
eDP
HDMI
Graphics API support
DirectX	11.1	12
OpenGL	4.2	4.4
Compatibility
Configurable TDP	30-35 Watt	12-35 Watt
Package Size	micro-BGA	micro-BGA
Sockets supported	BGA (FP3)	BGA (FP4)
Thermal Design Power (TDP)	35 Watt	35 Watt
Peripherals
Max number of PCIe lanes	16
PCI Express revision	3.0	3.0
UART
USB revision		3.0
Advanced Technologies
Enhanced Virus Protection (EVP)
Fused Multiply-Add 3 (FMA3)
Fused Multiply-Add 4 (FMA4)
Heterogeneous System Architecture (HSA)
Intel® Advanced Vector Extensions (AVX)
Intel® AES New Instructions
Intel® Advanced Vector Extensions 2 (AVX2)
Virtualization
AMD Virtualization (AMD-V™)