Xorg λειτουργία και μεγάλη κατανάλωση

Καλημερα,
λιγο καινουριος (εδω και μισο χρονο τρεχω με Ubuntu Karmic 9.10) και μετα απο μπολικο "παιχνιδι" σε διαφορους τομεις, παρατηρω οτι η μνημη μου ειναι φορτωμενη απο το Xorg (περιπου 45%) με τη CPU να "τρωει" κι αυτη ενα 10-12%. Υστερα απο λιγο googling δεν εβγαλα καποιο συμπερασμα. Κατα τα αλλα το μηχανημα ουτε κολλαει, ουτε συμπεριφερεται αργα. επισης καποιες πληροφοριες που θα φανουν χρησιμες ειναι:

SYSTEM INFORMATION
Running Ubuntu Linux, the Ubuntu 9.10 (karmic) release.
GNOME: 2.28.1 (Ubuntu 2009-11-03)
Kernel version: 2.6.31-16-generic (#53-Ubuntu SMP Tue Dec 8 04:01:29 UTC 2009)
GCC: 4.4.1 (i486-linux-gnu)
Xorg: unknown (26 October 2009 05:15:02PM) (26 October 2009 05:15:02PM)
Hostname: renos-desktop
Uptime: 0 days 3 h 34 min

CPU INFORMATION
GenuineIntel, Intel(R) Core(TM)2 Duo CPU E4500 @ 2.20GHz
Number of CPUs: 2
CPU clock currently at 1200.000 MHz with 2048 KB cache
Numbering: family(6) model(15) stepping(13)
Bogomips: 4399.28
Flags: fpu vme de pse tsc msr pae mce cx8 apic mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe lm constant_tsc arch_perfmon pebs bts pni dtes64 monitor ds_cpl est tm2 ssse3 cx16 xtpr pdcm lahf_lm

MEMORY INFORMATION
Total memory: 2012 MB
Total swap: 3656 MB

STORAGE INFORMATION
SCSI device - scsi0
Vendor: Optiarc
Model: DVD RW AD-7200A
SCSI device - scsi2
Vendor: ATA
Model: Hitachi HDS72168
SCSI device - scsi4
Vendor: pqi
Model: IntelligentStick

HARDWARE INFORMATION
MOTHERBOARD
Host bridge
Intel Corporation 82945G/GZ/P/PL Memory Controller Hub (rev 02)
Subsystem: ASUSTeK Computer Inc. Device 817a
PCI bridge(s)
Intel Corporation 82945G/GZ/P/PL PCI Express Root Port (rev 02)
Intel Corporation 82801G (ICH7 Family) PCI Express Port 1 (rev 01)
Intel Corporation 82801G (ICH7 Family) PCI Express Port 2 (rev 01)
Intel Corporation 82801 PCI Bridge (rev e1) (prog-if 01)
USB controller(s)
Intel Corporation 82801G (ICH7 Family) USB UHCI Controller #1 (rev 01)
Intel Corporation 82801G (ICH7 Family) USB UHCI Controller #2 (rev 01)
Intel Corporation 82801G (ICH7 Family) USB UHCI Controller #3 (rev 01)
Intel Corporation 82801G (ICH7 Family) USB UHCI Controller #4 (rev 01)
Intel Corporation 82801G (ICH7 Family) USB2 EHCI Controller (rev 01) (prog-if 20)
ISA bridge
Intel Corporation 82801GB/GR (ICH7 Family) LPC Interface Bridge (rev 01)
Subsystem: ASUSTeK Computer Inc. Device 8179
IDE interface
Intel Corporation 82801GB/GR/GH (ICH7 Family) SATA IDE Controller (rev 01) (prog-if 8f [Master SecP SecO PriP PriO])
Subsystem: ASUSTeK Computer Inc. Device 2601

GRAPHIC CARD
VGA controller
nVidia Corporation G72 [GeForce 7300 SE/7200 GS] (rev a1)

SOUND CARD
Multimedia controller
Intel Corporation 82801G (ICH7 Family) High Definition Audio Controller (rev 01)
Subsystem: ASUSTeK Computer Inc. Device 8290

NETWORK
Ethernet controller
Attansic Technology Corp. L2 100 Mbit Ethernet Adapter (rev a0)
Subsystem: ASUSTeK Computer Inc. Device 8233

NVIDIA GRAPHIC CARD INFORMATION
Model name: GeForce 7300 SE/7200 GS
Card Type: PCI-E 16x
Video RAM: 512 MB
GPU Frequency: 450 MHz
Driver version: NVIDIA UNIX x86 Kernel Module 173.14.20 Thu Jun 25 19:23:24 PDT 2009