iMac G5 Airport Issues

Hello there everyone,
i am using an iMac G5 with a version of Mac OS X 10.6.7.
The last month i am having some serious lag spike / high ping issues in internet gaming such as CS 1.6 and WoW. I thought that it was my ISP but when i realized that my laptop that is using Windows XP had no lag or ping problems i began to realize that my iMac might have some problems. Connecting the Mac to the router via ethernet solved all the lag spike and the high ping as well. The thing is that the router is in another apartment and i can't play with my Mac there. Is there anyway to fix the lag and the high ping with Airport? i searched over google a lot, tried many things and none worked. Posting some System info as well :
Airport:
Software Versions:
Menu Extra: 6.2.1 (621.1)
configd plug-in: 6.2.4 (624.2)
System Profiler: 6.0 (600.9)
Network Preference: 6.2.1 (621.1)
AirPort Utility: 5.5.2 (552.11)
IO80211 Family: 3.1.4 (314.1.1)
Interfaces:
en1:
Card Type: AirPort Extreme (0x14E4, 0x89)
Firmware Version: Broadcom BCM43xx 1.0 (5.10.131.36.9)
Locale: ETSI
Country Code: XA
Supported PHY Modes: 802.11 a/b/g
Supported Channels: 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 36, 40, 44, 48, 52, 56, 60, 64, 100, 104, 108, 112, 116, 120, 124, 128, 132, 136, 140, 149, 153, 157, 161, 165
Status: On



Model Name: iMac
Model Identifier: iMac4,1
Processor Name: Intel Core Duo
Processor Speed: 1.83 GHz
Number Of Processors: 1
Total Number Of Cores: 2
L2 Cache: 2 MB
Memory: 2 GB
Bus Speed: 667 MHz
Boot ROM Version: IM41.0055.B08
SMC Version (system): 1.1f5
Serial Number (system):
Hardware UUID:

G'day and welcome to the forums.

Well whatever it is it cannot be a G5 as PowerPC machines cannot install Snow Leopard, so it must be a later Intel model, which Apple System Profiler confirms as an Intel Core Duo.

iMacs have pretty basic graphics, the memory is minimal and the system bus speed pretty ancient now.