B4as_v2 by Microsoft Azure

B4as_v2 is a Basv2 family [AMD processor] [Premium Storage capable] 4 vCPUs server offered by Microsoft Azure with 4 vCPUs, 16 GiB of memory and 0 GB of storage. The pricing starts at 0.0439 USD per hour.
4 vCPU
16 GiB Memory
Spare SCore
5,400
(All-cores)
2,702
(Single-core)

Specifications

Server Metadata

Vendor ID
azure
Server ID
Standard_B4as_v2
Name
B4as_v2
API Reference
Standard_B4as_v2
API Reference Object
-
Description
Basv2 family [AMD processor] [Premium Storage capable] 4 vCPUs
Family
Basv2
Hw Virt
Average Time To Start
16.5
Status
active
Observed At
2026-10-18T17:52:41.577009

Availability

REGION / IDSPOTONDEMAND
Central India (IN) / centralindia
0.0886 USD/h 0.0984 USD/h
Jio India Central (IN) / jioindiacentral
- 0.0984 USD/h
Jio India West (IN) / jioindiawest
- 0.0984 USD/h
East US (US) / eastus
0.135 USD/h 0.15 USD/h
East US 2 (US) / eastus2
0.135 USD/h 0.15 USD/h
North Central US (US) / northcentralus
0.135 USD/h 0.15 USD/h
West US 2 (US) / westus2
0.135 USD/h 0.15 USD/h
West US 3 (US) / westus3
0.135 USD/h 0.15 USD/h
Sweden Central (SE) / swedencentral
0.1404 USD/h 0.156 USD/h
North Europe (IE) / northeurope
0.1467 USD/h 0.163 USD/h
Mexico Central (ZA) / mexicocentral
0.0439 USD/h 0.165 USD/h
Canada Central (CA) / canadacentral
0.1503 USD/h 0.167 USD/h
Canada East (CA) / canadaeast
0.1503 USD/h 0.167 USD/h
Central US (US) / centralus
0.135 USD/h 0.17 USD/h
France Central (FR) / francecentral
0.153 USD/h 0.17 USD/h
UK South (GB) / uksouth
0.153 USD/h 0.17 USD/h
Indonesia Central (ID) / indonesiacentral
0.1181 USD/h 0.171 USD/h
Malaysia West (MY) / malaysiawest
0.1181 USD/h 0.171 USD/h
Israel Central (IL) / israelcentral
0.1548 USD/h 0.172 USD/h
Italy North (IT) / italynorth
0.1548 USD/h 0.172 USD/h
Qatar Central (QA) / qatarcentral
0.1548 USD/h 0.172 USD/h
Austria East (AT) / austriaeast
0.1195 USD/h 0.173 USD/h
Belgium Central (BE) / belgiumcentral
0.1195 USD/h 0.173 USD/h
Germany West Central (DE) / germanywestcentral
0.1557 USD/h 0.173 USD/h
Korea South (KR) / koreasouth
0.1557 USD/h 0.173 USD/h
Poland Central (PL) / polandcentral
0.1557 USD/h 0.173 USD/h
West Europe (NL) / westeurope
0.1557 USD/h 0.173 USD/h
West US (US) / westus
0.1602 USD/h 0.178 USD/h
South Central US (US) / southcentralus
0.162 USD/h 0.18 USD/h
West Central US (US) / westcentralus
0.162 USD/h 0.18 USD/h
UAE North (AE) / uaenorth
0.1629 USD/h 0.181 USD/h
UK West (GB) / ukwest
0.1638 USD/h 0.182 USD/h
Korea Central (KR) / koreacentral
0.1683 USD/h 0.187 USD/h
Southeast Asia (SG) / southeastasia
0.1701 USD/h 0.189 USD/h
Australia Central (AU) / australiacentral
0.171 USD/h 0.19 USD/h
Australia Central 2 (AU) / australiacentral2
0.171 USD/h 0.19 USD/h
Australia East (AU) / australiaeast
0.171 USD/h 0.19 USD/h
Norway East (NO) / norwayeast
0.171 USD/h 0.19 USD/h
Switzerland North (CH) / switzerlandnorth
0.171 USD/h 0.19 USD/h
West India (IN) / westindia
0.1737 USD/h 0.193 USD/h
South Africa North (ZA) / southafricanorth
0.1755 USD/h 0.195 USD/h
Australia Southeast (AU) / australiasoutheast
0.1764 USD/h 0.196 USD/h
Japan East (JP) / japaneast
0.1764 USD/h 0.196 USD/h
Japan West (JP) / japanwest
0.1764 USD/h 0.196 USD/h
Spain Central (ES) / spaincentral
0.1764 USD/h 0.196 USD/h
New Zealand North (NZ) / newzealandnorth
0.18 USD/h 0.2 USD/h
East Asia (HK) / eastasia
0.189 USD/h 0.21 USD/h
Chile Central (CL) / chilecentral
0.1457 USD/h 0.211 USD/h
South India (IN) / southindia
0.1908 USD/h 0.212 USD/h
France South (FR) / francesouth
0.1989 USD/h 0.221 USD/h
Germany North (DE) / germanynorth
0.2025 USD/h 0.225 USD/h
UAE Central (AE) / uaecentral
0.2115 USD/h 0.235 USD/h
Brazil South (BR) / brazilsouth
0.2178 USD/h 0.242 USD/h
Norway West (NO) / norwaywest
0.2223 USD/h 0.247 USD/h
Switzerland West (CH) / switzerlandwest
0.2223 USD/h 0.247 USD/h
South Africa West (ZA) / southafricawest
0.2286 USD/h 0.254 USD/h
Brazil Southeast (US) / brazilsoutheast
0.2835 USD/h 0.315 USD/h

Processor

vCPUs
4
Hypervisor
Microsoft Hyper-V
CPU Allocation
Burstable
CPU Cores
2
CPU Speed
3.525 GHz
CPU Architecture
x86_64
CPU Manufacturer
AMD
CPU Family
EPYC
CPU Model
7763
CPU L1D Cache
32 KiB
CPU L1D Cache Total
64 KiB
CPU L1I Cache
32 KiB
CPU L1I Cache Total
64 KiB
CPU L2 Cache
512 KiB
CPU L2 Cache Total
1 MiB
CPU L3 Cache
32 MiB
CPU L3 Cache Total
32 MiB
CPU Flags
fpu, vme, de, pse, tsc, msr, pae, mce, cx8, apic, sep, mtrr, pge, mca, cmov, pat, pse36, clflush, mmx, fxsr, sse, sse2, ht, syscall, nx, mmxext, fxsr_opt, pdpe1gb, rdtscp, lm, constant_tsc, rep_good, nopl, tsc_reliable, nonstop_tsc, cpuid, extd_apicid, aperfmperf, pni, pclmulqdq, ssse3, fma, cx16, pcid, sse4_1, sse4_2, movbe, popcnt, aes, xsave, avx, f16c, rdrand, hypervisor, lahf_lm, cmp_legacy, cr8_legacy, abm, sse4a, misalignsse, 3dnowprefetch, osvw, topoext, vmmcall, fsgsbase, bmi1, avx2, smep, bmi2, erms, invpcid, rdseed, adx, smap, clflushopt, clwb, sha_ni, xsaveopt, xsavec, xgetbv1, xsaves, user_shstk, clzero, xsaveerptr, rdpru, arat, umip, vaes, vpclmulqdq, rdpid, fsrm
Ecpus
2
Scalability
50

System Resources and Accelerators

MEMORY
Memory Amount
16 GiB
Memory Amount Actual
16 GiB
ACCELERATORS
Accelerator Count
0
Accelerator Memory Min
0 MiB
Accelerator Memory Total
0 MiB
Accelerators
    STORAGE
    Storage Size
    0 GB
    Storages
      NETWORK
      Inbound Traffic
      0 GB/month
      Outbound Traffic
      0 GB/month
      IPv4
      0

      CPU and System Topology

      Server Description

      A burstable virtual machine featuring strong single-core performance and balanced memory for workloads with variable CPU utilization.

      Burstable & BudgetGeneral Purpose

      Microsoft Azure B4as_v2 is a burstable virtual machine from the Basv2 family, powered by an AMD EPYC 7763 processor on the x86_64 architecture. It features 4 vCPUs, 2 physical cores, and 16.0 GB of RAM, with no local storage or GPUs. Operating under Microsoft Hyper-V, the CPU runs at 3.525 GHz. Benchmarks reveal strong single-core performance in stress-ng, but weak multi-core capabilities, with multi-threaded bzip3 decompression falling into the bottom 10%. Memory bandwidth for large blocks and single-threaded compression tests show average performance, while database operations and static web serving throughput are weak. Due to its burstable CPU allocation, this instance represents a cost-efficient option for workloads with variable resource demands. It is best suited for light web serving, text processing, and development environments that do not require sustained multi-core processing power.

      Economics

      Average Price per Region

      Prices per Zone

      Lowest Prices

      Performance

      Workload Profiles

      0.3Score
      Precomputed compound score for Cache Intensive workloads. A weighted average (geometric mean) of benchmark scores compared to their medians: score = ∏ (x_i / m_i)^(w_i / Σw). The score of 1.0 represents a synthetic baseline server with the median performance of each component benchmark; 0.5 means roughly half the performance; and 2.0 means twice the performance of that reference profile. Component weights: 50% Redis RPS (pipeline=1, SET), 20% Redis RPS (pipeline=16, SET), 10% PassMark Memory Mark (composite), 10% Memory bandwidth (read, 16 MB ~ L3), 10% PassMark single-thread CPU. Rationale for component selection: In-memory key-value store workload, mixing direct Redis performance metrics with memory speed and latency benchmarks, and single-core CPU performance profiles.
      Component Score Weight Impact
      Raw Reference Normalized Target Actual
      Redis RPS (pipeline=1, SET) 320,735 ops/sec 1,917,050 ops/sec 0.17 50.00% 50.00% -59.00%
      Redis RPS (pipeline=16, SET) 2,429,883 ops/sec 11,661,818 ops/sec 0.2 20.00% 20.00% -28.00%
      PassMark Memory Mark (composite) 2,279 2,417 0.96 10.00% 10.00% -0.41%
      Memory bandwidth (read, 16 MB ~ L3) 131,051 MB/sec 108,361 MB/sec 1.2 10.00% 10.00% +1.80%
      PassMark single-thread CPU 2,389 Mops/s 2,365 Mops/s 1 10.00% 10.00% 0.00%

      Memory Bandwidth

      Compression

      OpenSSL

      Geekbench Single-Core

      Score: 1,601

      Geekbench Multi-Core

      Score: 3,698

      Passmark CPU Scores

      BENCHMARKSCORE
      Mark
      		 6191
      Compression
      		 65263
      Encryption
      		 4305
      Extended Instructions
      		 3620
      Floating Point Maths
      		 9180
      Integer Maths
      		 16541
      Physics
      		 756
      Prime Numbers
      		 39
      Single Threaded
      		 2389
      String Sorting
      		 9163

      Passmark Memory Scores

      BENCHMARKSCORE
      Memory Mark
      		 2279
      Database Operations
      		 1848
      Memory Latency
      		 62
      Memory Read Cached
      		 24369
      Memory Read Uncached
      		 19471
      Memory Write
      		 19314

      Stress-ng Raw Scores

      Stress-ng Relative Multicore Performance

      LLM Inference Speed for Prompt Processing

      LLM Inference Speed for Text Generation

      Static Web Server

      Redis

      Alternatives

      Servers of the Same Family

      INSTANCEvCPUsMEMORYAccelerators
      B2ats_v2 21 GiB0
      B2als_v2 24 GiB0
      B2as_v2 28 GiB0
      B4als_v2 48 GiB0
      B8als_v2 816 GiB0
      B8as_v2 832 GiB0
      B16als_v2 1632 GiB0

      Similar Servers

      INSTANCEVENDORvCPUsMEMORYAccelerators

      B4as_v2 FAQs