For a gaming pc? Hell no. Get a P4.
The only people that need 64-bit are scientific/medial computing and maybe 3D animation/CAD users. With 64 bit (I don't know of the AMD but with Itanium) you can run dual processers again, and use more memory than 4GB (up to 16GB right now I believe).
Keep in mind you also need a 64-bit OS like Windows XP 64-bit, which I don't think you can even buy unless you buy a 64-bit system from an OEM like HP, or a MSDN subscription which is $700/year for just the Operating Systems level subscription.... If they do decide to release it for retail it will likely cost $700-1500??
And take a look at the features that WinXP 64-bit does *NOT* support:
(from
http://www.microsoft.com/technet/tr...prodtechnol/winxppro/reskit/prka_fea_tfiu.asp )
Digital Media
The following digital media features are not included with Windows XP 64-Bit Edition:
Digital video disc (DVD) video playback
CD Recording
Kodak Imaging Accessory
Windows Media Player
A subset of Windows Media Technologies
DirectMusic®
Microsoft TV Technologies for Windows®
Video mixing renderer (VMR)
NetMeeting®
IEEE 1394 audio
Fax
Subsystems and Protocols
Windows XP 64-Bit Edition does not provide support for a number of older subsystems and transport protocols, including the following:
Microsoft® MS-DOS® subsystem
OS/2 subsystems
16-bit subsystems
Portable Operating System Interface for UNIX (POSIX) subsystem
Legacy transport protocols
Internetwork Packet Exchange/Sequenced Packet Exchange (IPX/SPX) LAN and WAN
AppleTalk Protocol LAN
Services for Macintosh
Data Link Control (DLC) LAN
NetBIOS Enhanced User Interface (NetBEUI) LAN
Service Advertising Protocol (SAP) Agent for Server
Internetwork Packet Exchange (IPX) router
Infrared Data Association (IrDA)
Open Shortest Path First (OSPF)
Network BIOS (NetBIOS) gateway
Mobile Computing
Windows XP 64-Bit Edition does not provide support for features aimed primarily at users of portable computers. The following features are not included:
Hot docking/undocking
PC Card
IrDA
Terminal Services client for Handheld PC
Power Management
System Restore
The System Restore feature is not supported in Windows XP 64-Bit Edition.
Networking and Communications
The following networking and communications features are not included in Windows XP 64-Bit Edition:
Internet Locator Service (ILS)
MSN Internet Access client
Message Queuing (MSMQ) Level 8 Listener
Windows Messenger Service
SharePoint Team Services from Microsoft
Database
The 64-bit versions of these database engines and features are not included in Windows XP 64-Bit Edition; 32-bit versions of Microsoft Database Engine (MSDE) and Jet RED are included.
Microsoft Database Engine (MSDE) 64-Bit
Jet RED 64-Bit
Microsoft Data Access Components (MDAC) Oracle provider
MDAC Oracle driver
MDAC Data Access Objects (DAOs)
MDAC Visual FoxPro® Driver
Dynamic Data Exchange (DDE) Share
System Administration
These system administration and management features are not supported in Windows XP 64-Bit Edition:
Winrep (Windows Report Tool)
Security Dynamics Access Control Entry (ACE) Agent
Windows Installer
Fast User Switching
Remote Assistance
File and Settings Transfer Wizard
Windows Product Activation (WPA)
Installation of Recovery Console on the hard disk; Recovery Console can be run from the operating system CD
Search Companion
Speech recognition