An Upgrade question

I'm considering upgrading my computer with a, hardrive to a 120-250 gb, adding another 1gb of ram, replacing the cd-rw with a DVD-Rom/CD-RW, and the cpu to a 3.06 but not knowing much about my motherboard, i'm not sure it will support it:

using evinsoft this is the current information i have at hand:

------PC Summary------Optiplex GX260

Computer System
Computer Name: OPTIPLEX-3EF5A1
Computer User: Administrator
OEM Info:
Hardware Info
CPU: Intel(R) Pentium(R) 4 CPU 2.53GHz
Memory: 1022MB (58% Free)
Harddisk: Western Digital 37 GB (7200r/m)
Video: NVIDIA GeForce 7600 GS 512MB
Multimedia: SoundMAX Digital Audio v5.5
Network: Intel(R) PRO/1000 MT Network Connection
Operation SystemWindows XP
ServicePack: 2.0
OS Version: 5.1 Build2600
ProductID: 76487-OEM-0011903-00102
LanguageID: $0409
StandardName: Central Standard Time
SystemUpTime: 5 Сʱ, 44 ·ÖÖÓ, 19 Ãë.
DVDRegion:
Internet Explorer: 7.0.5730.11
Microsoft DirectX: 4.09.00.0904
OpenGL: 5.1.2600.2180 (xpsp_sp2_rtm.040803-2158)
Microsoft Data Access Object: 3.6
Microsoft ActiveX Data Object: 2.8
Borland Database Engine:
ODBC: 3.525.1117.0 (xpsp_sp2_rtm.040803-2158)
Windows ASPI32:

------CPU Info------

CPU Info
BrandString: Intel(R) Pentium(R) 4 CPU 2.53GHz
Real Frequency: 2520MHz
Code Name: NorthWood(0.13 ¦Ìm) B
CPU Type: OEM
Vendor: GenuineIntel
Voltage: 1.5V
Transistor Count: 5500ten thousand
External Clock: 533MHz
Multiplier: 4.5
FBS: 2132MHz
Memory Wide: 17.1GB/s
Slot: Socket478
Package: PGA2
SerialNumber: 0000-0F27-BFEB-FBFF-0000-4400
CPU ID: 15-2-7
Brand ID: 9
Cache Info
Level1: 20KB
Level1 Code: 12KB
Level1 Data: 8KB
Level2: 512KB
Level3: 0KB
Features
MMX: Support
MMX+: Not Support
3DNow: Not Support
3DNow+: Not Support
SSE: Support
SSE2: Support
TyperThreading: Not Support
IA-64: Not Support

------Mainboard & BIOS------

Mainboard Info
SerialNumber: .. .
Manufacturer: Dell Computer Corp.
System
Model: OptiPlex GX260
Manufacturer: Dell Computer Corporation
SerialNumber: JZ71421
UUID: 44454C4C5A0010378031CAC04F343231
Slot
32 bit PCI Slot (Available)ID=:1
32 bit PCI Slot (Available)ID=:2
32 bit PCI Slot (Available)ID=:3
32 bit PCI Slot (Available)ID=:4
32 bit AGP 4X Slot (InUse)ID=:0
Port
PARALLEL: PortSlot_0
SERIAL1: PortSlot_1
KYBD: PortSlot_2
MOUSE: PortSlot_3
USB1: PortSlot_4
USB2: PortSlot_5
USB3: PortSlot_6
USB4: PortSlot_7
USB5: PortSlot_8
USB6: PortSlot_9
ENET: PortSlot_10
MIC: PortSlot_11
LINE-OUT: PortSlot_12
LINE-IN: PortSlot_13
HP-OUT: PortSlot_14
MONITOR: PortSlot_15
Devices:
RADEON 7500 Family (Microsoft Corporation)
NVIDIA GeForce 7600 GS
Intel(R) PRO/1000 MT Network Connection
Intel(R) 82801DB PCI Bridge - 244E
Intel(R) 82801DB LPC Interface Controller - 24C0
Intel(R) 82801DB/DBM USB Universal Host Controller - 24C2
Intel(R) 82801DB/DBM SMBus Controller - 24C3
Intel(R) 82801DB/DBM USB Universal Host Controller - 24C4
SoundMAX Integrated Digital Audio
Intel(R) 82801DB/DBM USB Universal Host Controller - 24C7
Intel(R) 82801DB Ultra ATA Storage Controller - 24CB
Intel(R) 82801DB/DBM USB 2.0 Enhanced Host Controller - 24CD
Intel(R) 82845G/GL Processor to I/O Controller 2560
Intel(R) 82845G/GL Processor to AGP Controller - 2561
Intel(R) 82845G/GL/GE/PE/GV Graphics Controller
BIOS Info
Name: AT/AT COMPATIBLE
ExtendedInfo:
Copyright: DELL - 6
BIOS Vendor: Dell Computer Corporation
BIOS Date: 09/24/02
BIOS Size: 512KB
SMBISO Version: 2.3

------Memory Info------

Physical Memory Info
Total: 1022MB
Used: 423MB
Left: 599MB
Usage: 41%
PageFile
Total: 1693MB
Used: 327MB
Left: 1366MB
Useage: 19%
Virtual Memory
Total: 2047MB
Used: 62MB
Left: 1985MB
Usage: 3%
System Resources
System: 90% Left
GDI: 90% Left
User: 90% Left
Memory Address From: 7FFEFFFF
Memory Address To: 00010000
Memory Bank Info
Slot: Unknown / Unknown
Speed:
Type:
Voltages:
MaxSize: 0MB
MemCtrlSlotCount: 0

------Disk Info------

Physical Disk
Capacity: 37 GB
Manufactory: Western Digital
Size: 3.5 inch
Slot: Ultra ATA100
Speed: 7200r/m
Cache Size: 2MB
System Cache: 0MB
Model: WDC WD400BB-75DEA0
SerialNumber: WD-WMAD1F309938
Revision: 05.03E05
Cylinders: 4865
TracksPerCylinder: 255
SectorsPerTrack: 63
BytesPerSector: 512
Rat(MB/s): 100MB/s
Feature:
Logic Disk
VolumeLabelC)
FileSystem£ºFAT32
SerialNumber£º07D6-091A
Capacity£º38152MB
FreeSpace£º9484MB
TotalClusters£º1220891
SectorsPerCluster£º64

------Display System------

Video Device Info
Adapter: NVIDIA GeForce 7600 GS
Chipset: GeForce 7600 GS
Memory Size: 512MB
Type: DDR/SDRam
RAMDAC: Integrated RAMDAC
Manufacturer: NVIDIA
BIOS Info: Version 5.73.22.51.51
BIOS Date: 08/22/07
BIOS Version: Version 5.73.22.51.51
Driver Version: 6.14.11.6375
Driver Date: 10-4-2007
Driver Provider: NVIDIA
Monitor
Product Name: SNY03B0
Current Resolution: 1280X1024
ColorDepth: 32Bit
Vertical Refresh Rate: 60HMz
Max Resolution: 800 x 600 - 4 bit
Horizonta lSize: 375mm
Vertical Size: 300mm
Visual Area:19.2inch

------Mutimedia------

Multimedia Drivers
Video Codecs
Microsoft Kernel Audio Splitter
Microsoft Kernel Acoustic Echo Canceller
Legacy Video Capture Devices
Audio Codecs
Legacy Audio Drivers
Media Control Devices
Microsoft Kernel Wave Audio Mixer
Microsoft WINMM WDM Audio Compatibility Driver
Microsoft Kernel DRM Audio Descrambler
Microsoft Kernel System Audio Device
SoundMAX Integrated Digital Audio
Microsoft Kernel GS Wavetable Synthesizer
Microsoft Kernel DLS Synthesizer
Wave-In
SoundMAX Digital Audio v5.5
Wave-Out
SoundMAX Digital Audio v5.5
Mid-In
Mid-Out
Microsoft GS Wavetable SW Synth v5.5
Mixer
SoundMAX Digital Audio v5.5
Engine
DirectX: 4.09.00.0904
OpenGL: 5.1.2600.2180 (xpsp_sp2_rtm.040803-2158)
Direct3D
Microsoft Direct3D Hardware acceleration through Direct3D HAL
Microsoft Direct3D Mono(Ramp) Software Emulation
Microsoft Direct3D RGB Software Emulation
DirectMusic
Microsoft Software Synthesizer
DirectPlay
WinSock TCP Connection For DirectPlay
WinSock IPX Connection For DirectPlay
Modem Connection For DirectPlay

------Network------

Network Info
VirtualAdapters
WAN Miniport (IP)
WAN Miniport (PPPOE)
WAN Miniport (L2TP)
Intel(R) PRO/1000 MT Network Connection - Packet Scheduler Miniport
Direct Parallel
WAN Miniport (PPTP)
WAN Miniport (IP) - Packet Scheduler Miniport
Clients
Client for Microsoft Networks
WebClient
Services
Remote Access Connection Manager
NetBIOS Interface
File and Printer Sharing for Microsoft Networks
QoS Packet Scheduler
Dial-Up Server
Application Layer Gateway
Generic Packet Classifier
Dial-Up Client
Wireless Zero Configuration
QoS RSVP
Steelhead
Protocols
Point to Point Protocol Over Ethernet
WINS Client(TCP/IP) Protocol
Layer 2 Tunneling Protocol
Internet Protocol (TCP/IP)
Message-oriented TCP/IP Protocol (SMB session)
Remote Access NDIS WAN Driver
Point to Point Tunneling Protocol
NDIS Usermode I/O Protocol
IP Addresses: 192.168.1.101
MACAddresses: 00-08-74-2D-70-7C
TCPIP
AdapterCount: 1
HostName: optiplex-3ef5a1
DNS Address:
24.93.41.125
24.93.41.126
WinSock
Description: WinSock 2.0
Version: 2.2
Status: Running

------Other------

Power Supply
Status: Off Line
Battery Status: NoBattery
Input Device Info
Keyboard: Standard 101/102-Key or Microsoft Natural PS/2 Keyboard
Mouse: PS/2 Compatible Mouse
USB Device Info
USB Root Hub
USB Root Hub
USB Composite Device
HP PSC 1400
USB Printing Support
HP PSC 1400 series (DOT4USB)
Sony DSC
USB Mass Storage Device
USB Mass Storage Device
USB Mass Storage Device
USB Mass Storage Device
USB Mass Storage Device

it has a 300w Antec power supply in it

I was informed that if I replaced the cpu with the same socket(understandable), FSB, and cahe size I would be alright, but never having heard this before wasn't sure if that was correct or not. I did read in a furom on dell that someone had put in a 3.06 with no problems but wanted to get some more opinions before I went through with it. It also brings up the question of how I know what type of bios to use if I need to flash it? Should I also see about putting in a larger power supply with these upgrades, I cant see the DVD-rom/cdrw or the larger harddrive to cause any problems with the power, but the ram and the cpu? I was considering this cpu:

Intel P4 3.06ghz socket 478 cpu 3.06ghz/512/533 SL6S5

Intel P4 3.06ghz socket 478 cpu 3.06ghz/512/533 SL6S5
Intel P4 processor
3.06ghz clock speed
533mhz Front Side Bus
512kb cache
Stepping code SL6S5
Tested prior to being pulled


Thank you for any information or opinions ya'll have always been most helpfull

That's a DELL, forget about upgrading the CPU except *maybe* with another P4, which would be a waste of money. A gig of RAM will make a world of difference in performance, and a new hard rive and DVD burner will work just fine.