Heat Issue With Core CPU or Bad Ram?

Hi Gang
Haven't been here for a while. Hope everyone are doing fine.
This is just a guess, but here's the situation:
Have 2 Dual Core 2.0 G5's, same amount of Ram, same software, Final Cut etc. I use Activity Monitor, Rember, and the free Temperature Monitor. I've had a few isolated cases of core shut down: "You need to restart your computer". Past expereinces have proven this to be on of the CPU's going bad. I have noticed however, that with the same software open, and with the same amount of RAM, I get lower core temperature readings with the reliable G5, and higher temperature readings with the other G5. On the higher end: 143-144 F, and on the lower side: 123-125 F. I also noticed the Blue area gets filled up a lot quicker with the problematic G5, (The Blue is used Ram).    
Rember shows no issues in either case ...
Looking to avoid paying the local Apple store $120 for a diagnostic test which may or not point to bad ram, or bad CPU.
Any ideas?
Thank you
Mike

Hey-
Your high temps aren't that high.
BD is right that your thermal paste could use changing (the stuff is 5 year effective, max), but you really don't have that hot of CPUs.
How about the memory controller? I would be more concerned there.
What temps show there?
The memory controller is on the back side of the logic board, sandwiched between the PCB and the case. There are heat sinks and a blower, but there isn't a goiod way to avoid plugging it all up with dust.
Maybe time for a good blow job......

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    Computer
    Processor Intel(R) Pentium(R) 4 CPU 1.60GHz
    Memory 1034MB (239MB used)
    Operating System Arch Linux
    User Name mythus (Travis K. Randall)
    Date/Time Thu 08 Oct 2009 05:24:52 PM CDT
    Display
    Resolution 1600x900 pixels
    OpenGL Renderer GeForce2 MX/AGP/SSE2
    X11 Vendor The X.Org Foundation
    Multimedia
    Audio Adapter ICH - Intel 82801BA-ICH2
    Input Devices
    Macintosh mouse button emulation
    AT Translated Set 2 keyboard
    Power Button
    Power Button
    PC Speaker
    Logitech USB Optical Mouse
    Printers
    No printers found
    SCSI Disks
    ATA ST3160212A
    ATA IC35L090AVV207-0
    LITE-ON LTR-16102B
    TSSTcorp CD/DVDW TS-H552D
    Operating System
    Version
    Kernel Linux 2.6.30-ARCH (i686)
    Compiled #1 SMP PREEMPT Wed Sep 9 12:37:32 UTC 2009
    C Library GNU C Library version 2.10.1 (stable)
    Default C Compiler GNU C Compiler version 4.4.1 (GCC)
    Distribution Arch Linux
    Current Session
    Computer Name norova
    User Name mythus (Travis K. Randall)
    Home Directory /home/mythus
    Desktop Environment Unknown (Window Manager: Fluxbox)
    Misc
    Uptime 11 hours, 38 minutes
    Load Average 0.20, 0.38, 0.34
    Kernel Modules
    Loaded Modules
    ipv6 IPv6 protocol stack for Linux
    reiserfs ReiserFS journaled filesystem
    usbhid USB HID core driver
    hid
    arc4 ARC4 Cipher Algorithm
    ecb ECB block cipher algorithm
    snd_seq_dummy ALSA sequencer MIDI-through client
    rt2500pci Ralink RT2500 PCI & PCMCIA Wireless LAN driver.
    snd_seq_oss OSS-compatible sequencer module
    rt2x00pci rt2x00 pci library
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    rt2x00lib rt2x00 library
    snd_seq Advanced Linux Sound Architecture sequencer.
    led_class LED Class Interface
    snd_seq_device ALSA sequencer device management
    input_polldev Generic implementation of a polled input device
    mac80211 IEEE 802.11 subsystem
    snd_intel8x0 Intel 82801AA,82901AB,i810,i820,i830,i840,i845,MX440; SiS 7012; Ali 5455
    uhci_hcd USB Universal Host Controller Interface driver
    snd_pcm_oss PCM OSS emulation for ALSA.
    fan ACPI Fan Driver
    cfg80211 wireless configuration support
    ppdev
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    snd_mixer_oss Mixer OSS emulation for ALSA.
    snd_ac97_codec Universal interface for Audio Codec '97
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    eeprom_93cx6 EEPROM 93cx6 chip driver
    parport_pc PC-style parallel port driver
    ohci1394 Driver for PCI OHCI IEEE-1394 controllers
    parport
    psmouse PS/2 mouse driver
    ac97_bus
    ieee1394
    serio_raw Raw serio driver
    8139too RealTek RTL-8139 Fast Ethernet driver
    e100 Intel(R) PRO/100 Network Driver
    snd_pcm Midlevel PCM code for ALSA.
    pcspkr PC Speaker beeper driver
    battery ACPI Battery Driver
    8139cp RealTek RTL-8139C+ series 10/100 PCI Ethernet driver
    snd_timer ALSA timer interface
    i2c_core I2C-Bus main module
    iTCO_wdt Intel TCO WatchDog Timer Driver
    mii MII hardware support library
    evdev Input driver event char devices
    snd Advanced Linux Sound Architecture driver for soundcards.
    ac ACPI AC Adapter Driver
    iTCO_vendor_support Intel TCO Vendor Specific WatchDog Timer Driver Support
    usbcore
    soundcore Core sound module
    sg SCSI generic (sg) driver
    shpchp Standard Hot Plug PCI Controller Driver
    snd_page_alloc Memory allocator for ALSA system.
    processor ACPI Processor Driver
    thermal ACPI Thermal Zone Driver
    pci_hotplug PCI Hot Plug PCI Core
    intel_agp
    button ACPI Button Driver
    agpgart AGP GART driver
    rtc_cmos Driver for PC-style 'CMOS' RTCs
    rtc_core RTC class support
    rtc_lib
    ext4 Fourth Extended Filesystem
    mbcache Meta block cache (for extended attributes)
    jbd2
    crc16 CRC16 calculations
    sr_mod SCSI cdrom (sr) driver
    cdrom
    sd_mod SCSI disk (sd) driver
    ata_piix SCSI low-level driver for Intel PIIX/ICH ATA controllers
    ata_generic low-level driver for generic ATA
    pata_acpi SCSI low-level driver for ATA in ACPI mode
    libata Library module for ATA devices
    floppy
    scsi_mod SCSI core
    Display
    Display
    Display
    Resolution 1600x900 pixels
    Vendor The X.Org Foundation
    Version 1.6.3.901
    Monitors
    Monitor 0 1600x900 pixels
    Extensions
    BIG-REQUESTS
    Composite
    DAMAGE
    DOUBLE-BUFFER
    DPMS
    DRI2
    GLX
    Generic Event Extension
    MIT-SCREEN-SAVER
    MIT-SHM
    NV-CONTROL
    NV-GLX
    RANDR
    RECORD
    RENDER
    SECURITY
    SHAPE
    SYNC
    X-Resource
    XC-MISC
    XFIXES
    XFree86-DGA
    XFree86-VidModeExtension
    XINERAMA
    XInputExtension
    XKEYBOARD
    XTEST
    XVideo
    OpenGL
    Vendor NVIDIA Corporation
    Renderer GeForce2 MX/AGP/SSE2
    Version 1.5.8 NVIDIA 96.43.13
    Direct Rendering Yes
    Processor
    Processor
    Processor
    Name Intel(R) Pentium(R) 4 CPU 1.60GHz
    Family, model, stepping 15, 1, 2 (Pentium 4)
    Vendor Intel
    Configuration
    Cache Size 256kb
    Frequency 1594.77MHz
    BogoMIPS 3190.44
    Byte Order Little Endian
    Features
    FDIV Bug no
    HLT Bug no
    F00F Bug no
    Coma Bug no
    Has FPU yes
    Cache
    Cache information not available
    Capabilities
    fpu Floating Point Unit
    vme Virtual 86 Mode Extension
    de Debug Extensions - I/O breakpoints
    pse Page Size Extensions (4MB pages)
    tsc Time Stamp Counter and RDTSC instruction
    msr Model Specific Registers
    pae Physical Address Extensions
    mce Machine Check Architeture
    cx8 CMPXCHG8 instruction
    apic Advanced Programmable Interrupt Controller
    sep Fast System Call (SYSENTER/SYSEXIT)
    mtrr Memory Type Range Registers
    pge Page Global Enable
    mca Machine Check Architecture
    cmov Conditional Move instruction
    pat Page Attribute Table
    pse36 36bit Page Size Extensions
    clflush Cache Line Flush instruction
    dts Debug Store
    acpi Thermal Monitor and Software Controlled Clock
    mmx MMX technology
    fxsr FXSAVE and FXRSTOR instructions
    sse SSE instructions
    sse2 SSE2 (WNI) instructions
    ss Self Snoop
    ht HyperThreading
    tm Thermal Monitor
    up smp kernel running on up
    pebs Precise-Event Based Sampling
    bts Branch Trace Store
    Memory
    Memory
    Total Memory 1034084 kB
    Free Memory 94276 kB
    Buffers 40536 kB
    Cached 700112 kB
    Cached Swap 0 kB
    Active 170788 kB
    Inactive 726844 kB
    Active(anon) 74112 kB
    Inactive(anon) 88348 kB
    Active(file) 96676 kB
    Inactive(file) 638496 kB
    Unevictable 12 kB
    Mlocked 12 kB
    High Memory 139144 kB
    Free High Memory 252 kB
    Low Memory 894940 kB
    Free Low Memory 94024 kB
    Virtual Memory 2931852 kB
    Free Virtual Memory 2931852 kB
    Dirty 12 kB
    Writeback 0 kB
    AnonPages 156996 kB
    Mapped 57392 kB
    Slab 24260 kB
    SReclaimable 18864 kB
    SUnreclaim 5396 kB
    PageTables 1376 kB
    NFS_Unstable 0 kB
    Bounce 0 kB
    WritebackTmp 0 kB
    CommitLimit 3448892 kB
    Committed_AS 404212 kB
    VmallocTotal 122880 kB
    VmallocUsed 27648 kB
    VmallocChunk 52368 kB
    DirectMap4k 32760 kB
    DirectMap4M 876544 kB
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    CPU Blowfish
    This Machine 1595 MHz 50.176
    Intel(R) Celeron(R) M processor 1.50GHz (null) 26.1876862
    PowerPC 740/750 (280.00MHz) (null) 172.816713
    CPU CryptoHash
    CPU CryptoHash
    This Machine 1595 MHz 11.071
    CPU Fibonacci
    CPU Fibonacci
    This Machine 1595 MHz 74.202
    Intel(R) Celeron(R) M processor 1.50GHz (null) 8.1375674
    PowerPC 740/750 (280.00MHz) (null) 58.07682
    CPU N-Queens
    CPU N-Queens
    This Machine 1595 MHz 132.704
    FPU FFT
    FPU FFT
    This Machine 1595 MHz 104.630
    FPU Raytracing
    FPU Raytracing
    This Machine 1595 MHz 212.639
    Intel(R) Celeron(R) M processor 1.50GHz (null) 40.8816714
    PowerPC 740/750 (280.00MHz) (null) 161.312647
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    Thanks in advance for any and all help. I understand that there is a lot of info in this post, but it is my hope that with this info the problem can be solved. If there is info I didn't provide that is needed, please let me know.

    also check that you have
    session.screen0.opaqueMove false
    in your .fluxbox/init  this will probably help a bit if it is currently true,
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