Cannot reach 1300Mbps using DW1830 (BCM943602BAED) with linux-firmware

I cannot reach 1300Mbps using DW1830 (BCM943602BAED) with linux-firmware, only 985Mbps maximum.
It works fine under win10.
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ProblemType: Bug
ApportVersion: 2.20.9-0ubuntu7.6
Architecture: amd64
CurrentDesktop: XFCE
Dependencies:

DistroRelease: Ubuntu 18.04
InstallationDate: Installed on 2019-01-07 (136 days ago)
InstallationMedia: Xubuntu 18.04.1 LTS "Bionic Beaver" - Release amd64 (20180725)
Package: linux-firmware 1.173.6
PackageArchitecture: all
Tags: bionic
Uname: Linux 5.2.0-050200rc1-generic x86_64
UnreportableReason: The running kernel is not an Ubuntu kernel
UpgradeStatus: No upgrade log present (probably fresh install)
UserGroups: adm cdrom dip kvm libvirt lpadmin plugdev sambashare sudo
_MarkForUpload: True
---
ProblemType: Bug
ApportVersion: 2.20.9-0ubuntu7.6
Architecture: amd64
AudioDevicesInUse:
 USER PID ACCESS COMMAND
 /dev/snd/controlC0: zz 1947 F.... pulseaudio
 /dev/snd/controlC1: zz 1947 F.... pulseaudio
CurrentDesktop: XFCE
Dependencies:

DistroRelease: Ubuntu 18.04
HibernationDevice: RESUME=UUID=476fdc81-601b-4873-9a2d-bb31c386751d
InstallationDate: Installed on 2019-01-07 (136 days ago)
InstallationMedia: Xubuntu 18.04.1 LTS "Bionic Beaver" - Release amd64 (20180725)
MachineType: LENOVO 20AMS0SQ04
Package: linux-firmware 1.173.6
PackageArchitecture: all
ProcFB: 0 inteldrmfb
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.15.0-43-generic root=UUID=f1dabdd1-cb25-441e-b278-17d5788a6ebc ro quiet splash vt.handoff=1
ProcVersionSignature: Ubuntu 4.15.0-43.46-generic 4.15.18
RelatedPackageVersions:
 linux-restricted-modules-4.15.0-43-generic N/A
 linux-backports-modules-4.15.0-43-generic N/A
 linux-firmware 1.173.6
RfKill:
 0: phy0: Wireless LAN
  Soft blocked: no
  Hard blocked: no
Tags: bionic
Uname: Linux 4.15.0-43-generic x86_64
UpgradeStatus: No upgrade log present (probably fresh install)
UserGroups: adm cdrom dip kvm libvirt lpadmin plugdev sambashare sudo
_MarkForUpload: True
dmi.bios.date: 08/01/2016
dmi.bios.vendor: LENOVO
dmi.bios.version: GIET86WW (2.36 )
dmi.board.asset.tag: Not Available
dmi.board.name: 20AMS0SQ04
dmi.board.vendor: LENOVO
dmi.board.version: Not Defined
dmi.chassis.asset.tag: No Asset Information
dmi.chassis.type: 10
dmi.chassis.vendor: LENOVO
dmi.chassis.version: Not Available
dmi.modalias: dmi:bvnLENOVO:bvrGIET86WW(2.36):bd08/01/2016:svnLENOVO:pn20AMS0SQ04:pvrThinkPadX240:rvnLENOVO:rn20AMS0SQ04:rvrNotDefined:cvnLENOVO:ct10:cvrNotAvailable:
dmi.product.family: ThinkPad X240
dmi.product.name: 20AMS0SQ04
dmi.product.version: ThinkPad X240
dmi.sys.vendor: LENOVO