How to enable Hyper Threading on PowerEdge R620

Hi,

We many "PowerEdge R620" servers used as Database servers.

We are unable to enable Hyper Threading on these servers.

It is enabled in BIOS , CPU supports it , not disabled in boot loader

OS : Suse 11 SP 2   64bit  , 3.10.15

Intel(R) Xeon(R) CPU E5-2690 0 @ 2.90GHz

ark.intel.com/.../Intel-Xeon-Processor-E5-2690-20M-Cache-2_90-GHz-8_00-GTs-Intel-QPI

dmicode , reports "HTT (Hyper-threading technology)" , but not lscpu

Architecture: x86_64

CPU op-mode(s): 32-bit, 64-bit
Byte Order: Little Endian
CPU(s): 8
On-line CPU(s) list: 0-7
Thread(s) per core: 1
Core(s) per socket: 8
Socket(s): 1
NUMA node(s): 1
Vendor ID: GenuineIntel
CPU family: 6
Model: 45
Stepping: 7
CPU MHz: 2899.979
BogoMIPS: 5799.95
Virtualization: VT-x
L1d cache: 32K
L1i cache: 32K
L2 cache: 256K
L3 cache: 20480K
NUMA node0 CPU(s): 0-7

#cpupower info

System's multi core scheduler setting: not supported
System's thread sibling scheduler setting: not supported
System does not support Intel's performance bias setting
analyzing CPU 0:

cpupower frequency-info
analyzing CPU 0:
no or unknown cpufreq driver is active on this CPU
boost state support:
Supported: yes
Active: yes
3400 MHz max turbo 4 active cores
3600 MHz max turbo 3 active cores
3600 MHz max turbo 2 active cores
3800 MHz max turbo 1 active cores

Question

1) How to enable Hyper Threading

2) How to get / set Max Boot or Tubro CPU Speed ( Turbo Boost is enabled in  BIOS )

3) How to change match / enable Memory speed  what it is capable of

Example:

Memory Device
Array Handle: 0x1000
Error Information Handle: Not Provided
Total Width: 72 bits
Data Width: 64 bits
Size: 16384 MB
Form Factor: DIMM
Set: 1
Locator: DIMM_A1
Bank Locator: Not Specified
Type: DDR3
Type Detail: Synchronous
Speed: 1600 MHz (0.6 ns)
Manufacturer: 00CE04B300CE
Serial Number: 36BC96A8
Asset Tag: 02133721
Part Number: M393B2G70QH0-YK0
Configured Clock Speed: 1333 MHz (0.8 ns)