Overheating please help

Maybe it is not a huge emergency but my Intel Active Monitor comes up
with warnings when I do some heavy-duty CPU usage. Specifically it is
happening now when I am encoding a DVD. I understand video rendering
is heavy on the CPU but my CPU is a Northwood 3.0 GHz P4 with HT. This
CPU should reduce its own activity to accomodate temperature,
shouldn't it?

Besides that, my motherboard is Intel, and I have plenty of cooling -
In-Win case with a side-vent over the CPU fan, PSU fan, extra chassis
fan.

The CPU zone is being reported at 79°c / 174°F
System Zone 2 is being reported at 147°F

With all the cooling and the fact that the motherboard is Intel (and
therefore, I would assume can reduce CPU cycles to reduce
temperature), shouldn't this not be happening?

I am using DVD Shrink to render an ISO file for burning DVD.

Any advice/thoughts appreciated.

Here is some sysinfo:

CPU(s)
Number of CPUs 2 (1 Physical)

CPU#1 APIC ID = 0
CPU Name Intel Pentium 4
Name Intel Pentium 4
Code Name Northwood
Specification Intel(R) Pentium(R) 4 CPU 3.00GHz
Family / Model / Stepping F 2 9
Extended Family / Model 0 0
Brand ID 9
Package mPGA-478
Core Stepping D1
Technology 0.13 µ
Supported Instructions Sets MMX, SSE, SSE2
CPU Clock Speed 2992.4 MHz
Clock multiplier x 15.0
Front Side Bus Frequency 199.5 MHz
Bus Speed 798.0 MHz
L1 Data Cache 8 KBytes, 4-way set associative, 64 Bytes line size
L1 Trace Cache 12 Kµops, 8-way set associative
L2 Cache 512 KBytes, 8-way set associative, 64 Bytes line size
L2 Speed 2992.4 MHz (Full)
L2 Location On Chip
L2 Data Prefetch Logic yes
L2 Bus Width 256 bits

CPU#2 APIC ID = 1
CPU Name Intel Pentium 4 (logical unit)


Mainboard and chipset
Motherboard manufacturer Intel Corporation
Motherboard model D865PERL, AAC40926-205
BIOS vendor Intel Corp.
BIOS revision RL86510A.86A.0075.P15.0404021333
BIOS release date 04/02/2004
Chipset Intel i865P/PE/G/i848P rev. A2
Southbridge Intel 82801EB (ICH5) rev. 2
FSB Select 800 MHz
Performance Mode disabled
Graphic Interface AGP
AGP Status enabled, rev. 3.0
AGP Data Transfert Rate 8x
AGP Max Rate 8x
AGP Side Band Addressing supported, enabled
AGP Aperture Size 64 MBytes

Memory
DRAM Type DDR-SDRAM
DRAM Size 1024 MBytes
DRAM Frequency 199.5 MHz
FSBRAM 1:1
CAS# Latency 3.0 clocks
RAS# to CAS# 3 clocks
RAS# Precharge 3 clocks
Cycle Time (TRAS) 8 clocks
# of memory modules 2
Module 0 Micron Technology DDR-SDRAM PC3200 - 992 MBytes
Module 1 Micron Technology DDR-SDRAM PC3200 - 512 MBytes

Software
Windows version Microsoft Windows XP Professional Service Pack 1
(Build 2600)
DirectX version 9.0b



---Atreju---