Dl580 G7 With Hewlett-Packard Company NC552SFP 2-port 10Gb Server Adapter speed slow

I have 2 DL580 G7 machines with RHEL 6.7

I Hope we can get 300MB/s.

But I only get 138MB/s

sftp> get rhel-server-6.6-x86_64-dvd.iso
Fetching /root/rhel-server-6.6-x86_64-dvd.iso to rhel-server-6.6-x86_64-dvd.iso
/root/rhel-server-6.6-x86_64-dvd.iso 100% 3607MB 138.7MB/s00:26
sftp> quit
[root@rhevh001 ~]# ethtool -i eth7
driver: be2net
version: 11.1.145.27
firmware-version: 4.9.311.20
bus-info: 0000:89:00.1
supports-statistics: yes
supports-test: yes
supports-eeprom-access: yes
supports-register-dump: no
supports-priv-flags: yes
[root@rhevh001 ~]#

eth7      Link encap:Ethernet  HWaddr 88:51:FB:39:79:74
          inet addr:192.168.1.100  Bcast:192.168.1.255  Mask:255.255.255.0
          inet6 addr: fe80::8a51:fbff:fe39:7974/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST  MTU:9000  Metric:1
          RX packets:933634 errors:0 dropped:0 overruns:0 frame:0
          TX packets:726496 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000
          RX bytes:7653019360 (7.1 GiB)  TX bytes:67076482 (63.9 MiB)
          Memory:821a0000-821c0000

[root@rhevh001 ~]# ethtool eth7
Settings for eth7:
        Supported ports: [ FIBRE ]
        Supported link modes:   1000baseT/Full
                                10000baseT/Full
        Supported pause frame use: Symmetric
        Supports auto-negotiation: No
        Advertised link modes:  Not reported
        Advertised pause frame use: No
        Advertised auto-negotiation: No
        Speed: 10000Mb/s
        Duplex: Full
        Port: FIBRE
        PHYAD: 1
        Transceiver: external
        Auto-negotiation: off
        Supports Wake-on: g
        Wake-on: d
        Current message level: 0x00002000 (8192)
                               hw
        Link detected: yes

[root@rhevh001 ~]# cat /etc/redhat-release
Red Hat Enterprise Linux Server release 6.7 (Santiago)
[root@rhevh001 ~]#