Some months ago I bought 4 Memory modules of 4GB DDR3 1600 KINGSTON HYPERX. The official Kingston manual says:

*This module has been tested to run at DDR3-1600 at a low latency timing of 9-9-9-27 at 1.65V.The SPD is programmed to JEDEC standard latency DDR3-1333 timing of 9-9-9.

I cannot find which is the real speed of my memory modules. I normally get from several tools that the real speed is 1333 Mhz

srs@ubuntu:~$ sudo dmidecode -t memory
# dmidecode 2.9
SMBIOS 2.6 present.

Handle 0x005D, DMI type 16, 15 bytes
Physical Memory Array
    Location: System Board Or Motherboard
    Use: System Memory
    Error Correction Type: None
    Maximum Capacity: 32 GB
    Error Information Handle: 0x005F
    Number Of Devices: 4

Handle 0x005C, DMI type 17, 28 bytes
Memory Device
    Array Handle: 0x005D
    Error Information Handle: 0x0060
    Total Width: 64 bits
    Data Width: 64 bits
    Size: 4096 MB
    Form Factor: DIMM
    Set: None
    Locator: ChannelA-DIMM0
    Bank Locator: BANK 0
    Type: <OUT OF SPEC>
    Type Detail: Synchronous
    Speed: 1333 MHz (0.8 ns)
    Manufacturer: Kingston
    Serial Number: 07288F23
    Asset Tag: 9876543210
    Part Number: 9905403-439.A00LF 

How can I switch memory modules to 1600 Mhz?