A8N32SLI-Deluxe and the AMD Athlon X2 4800

I have been trying to overclock my rig and I have used the settings attached :-

CPU (X2 4400+ @ 2750 MHz)
-------------------------
AI Overclocking Manual
CPU FSB Frequency 250
SB to NB Overclock Manual
SB to NB Frequency 200
Adjust PCIE Frequency 100
PEG link mode Disabled
Over-voltage cpu vcore Enabled
Over-voltage NB vcore Enabled
Over-voltage SB vcore Enabled
Over-voltage Hypertransport Enabled
DDR VCORE 2.80V
FID/VID Change Manual
Processor Frequency M. 11X
Processor Voltage 1.325
DDR Clock Skew Auto
ECC Disable

MEMORY (Corsair 3500LL-Pro @ 250MHz)
------------------------------------
Memclock mode Limit
Memclock value 200
Timing mode Manual
CAS Latency 2.5
TRAS 6
TRP 2
TRCD 3
TRRD 2T
TRC 8
TRFC 24
TRWT 2 CLK
MCT Extra timing mode Manual
TREF 7.8
TWCL 1
R/W Queue Bypass 8
Bypass Max 4
Idle cycle limit 64
Dynamic idle counter Disabled
DDR driving strength Normal
Enable 32-byte Granularity Disabled
TWR 2 CLK
DDR input strobe skew Disabled
DDR Data driving strength Disabled
User config mode Manual
Read Preamble 9.5ns
Asyc Latency 11.0ns
Bank Interleaving Auto
Burst length 4 beats
Hardware memory hole Disabled

CHIPSET (Asus A8N32-SLI Deluxe)
-------------------------------
K8 to NB Frequency 4x
K8 to NB linkwidth 16/16
SB to NB frequency 5x
SB to NB Linkwidth 16/16


These are rock solid with my setup. However they were designed for use with a 4400+. Can anyone make any suggestions to squeeze some more out of my 4800+.

Details of my setup are attached:-

Asus A8N32SLI-Deluxe (X16) Motherboard
DualCore AMD Athlon 64 X2, 2400 MHz 4800+ (running @ 2750mhz/5500+)
2 x NVIDIA GeForce 7900 GTX (512 MB) (running in Sli mode)
USB Sound Blaster Audigy 2 NX
Seasonic S12-600 PSU
2 x Corsair CMX1024-3500LLPRO 1GB PC3200 DDR SDRAM (2.0-3-2-6 @ 200 MHz) (running at 250mhz)
Haupauge WinTv USB2 External TV Card
2 x WD Raptor 75 GB hard drives (System Raid 0)
2 x WD Caviar 250 GB hard drives (Storage Raid 0)
Asetek Waterchill Water cooling system using the Xtreme Pump.
2 x Dangerden Koosah GPU Water Blocks
1 x Asetek Waterchill CPU (939) Water block
Triple Rad cooling for Water using 6 120mm Fans.
7 Sharkoon Silent Eagle 2000 (80mm) Case fans.
Blue LED Case Lighting.
LG DVD-RW drive.

Any help with this would really be appreciated. I am sure I can get closer to 3.0ghz stable.

Thanks in advance

A8N32SLi Deluxe nForce4 Ultra - overvolt:cpu,NB,SB,HTT
X2 4600 E4 @ 2.9Ghz (290x10;290x3LDT); 1.56vCore + Thermalright Si-120 + Silenx pro 120x38mm 75cfm
Patriot PC3500LLK 2048Mb @ 242-3-3-2-5-1T;166/200 div, 2.7vDimm + OCZ XTC 2x60mm heatfan spreader
BFG 7900GS OC DDR3 256mb PCIe16 stock 540/650
CORSAIR TX-750W 60A single 12v rail, 720W max

Coolermaster CM-690 6-sided cooling chassis:
120mm rear exhuast
2x120mm top exhaust
2x120mm side GPU/CPU intakes
120mm front intake
120mm base intake
140mm CORSAIR bottom intake
80x15mm motherboard side intake
aggressive cable management

5 hard disks + 2 DVD optical burners

Win XP Home SP3 Custom Edition
First Defence Instant OS System recovery shells
Adobe Photoshop CS3, Web Design, DV rendering workstation;
Not a Gamer; an OVER clocker

Over-AMPed my previous Antec Truepower 550W 30A 12v rail PSU as I discovered too late how critical it is for overclocking stability: I was at times at 29-33A full load.

Watch out ! PSU wattage and multiple rails are not IT !