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 Post subject: P4 OC question.
PostPosted: Sat Mar 19, 2005 6:55 pm 
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Posts: 277
Location: Magee, Mississippi
I am running a P4 2.8C w/ an Asus P4P800 SE, Antec 550 PSU, G.Skill PC4400 & Leadtek A400 6800 GT.

CPU-Z Report

--------------------------------------------------------------------------------
CPU(s)

CPU Name Intel Pentium 4 (@1.80 volts)
Name Intel Pentium 4
Code Name Northwood
Specification Intel(R) Pentium(R) 4 CPU 2.80GHz
CPU Clock Speed 3715.5 MHz
Clock multiplier x 14.0
Front Side Bus Frequency 265.4 MHz
Bus Speed 1061.6 MHz
L2 Speed 3715.5 MHz (Full)

Mainboard and chipset
Motherboard manufacturer ASUSTeK Computer Inc.
Motherboard model P4P800SE, Rev 2.xx
BIOS vendor American Megatrends Inc.
BIOS revision 080009
BIOS release date 02/17/2005
Chipset Intel i865P/PE/G/i848P rev. A2
FSB Select 800 MHz
Graphic Interface AGP(@1.5 volts)
AGP Status enabled, rev. 3.0
AGP Data Transfert Rate 8x
AGP Max Rate 8x
AGP Side Band Addressing supported, enabled
AGP Aperture Size 256 MBytes

Memory
DRAM Type DDR-SDRAM
DRAM Size 1024 MBytes (@2.75 volts)
DRAM Frequency 265.4 MHz
FSB:DRAM 1:1
CAS# Latency 2.5 clocks
RAS# to CAS# 3 clocks
RAS# Precharge 3 clocks
Cycle Time (TRAS) 6 clocks
# of memory modules 2
Module 0 DDR-SDRAM PC4400 - 512 MBytes
Module 1 DDR-SDRAM PC4400 - 512 MBytes

Software
Windows version Microsoft Windows XP Professional Service Pack 2 (Build 2600)
DirectX version 9.0c

Stable except in 3D games however it does not shut down nor does it give me the blue screen. Runs fine just has odd artifacts, consisting of black flashes, that it does not have at lower clock speeds. The video card is not OCed. I have so far tryed changing the drive & OCing the card a bit as well neither worked. Any ideas how to correct this problem or what could be the cause?


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 Post subject:
PostPosted: Tue Mar 22, 2005 12:57 pm 
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Sounds like your Processor is too hot though judging by the specs of your system you may have cooling under control. Less likely, but entirely possible is your Graphics card is overheating, happened to me once with a 9700 pro, i bought a vga silencer and the problem went away. Its not uncommon to see card manufactures supply cards that arent top of the line with second rate cooling.


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 Post subject:
PostPosted: Tue Mar 22, 2005 1:41 pm 
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Posts: 387
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I'm not too sure what exactly is causing your artifacting in games, but since you said the problem disappears when you clock the cpu back it is obviously related to your cpu overclock. How much do you have to lower the clock speeds to prevent the artifacts from appearing?

I also noticed that your are running that P4 at 1.8v which is pretty damn high for those procs. I sincerely hope that you have some heavy duty cooling to back up that voltage.


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 Post subject:
PostPosted: Tue Mar 22, 2005 3:35 pm 
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This is the highest I can run without any artifacts. I am running at 28C idle & 43C under full load. The leadtek 6800GT is running at 54C idle & about 64C under load. For case cooling I am using MDMM 80mm Fan Mods 2 intakes & one top exhaust. And one 90mm Papst, Model 3412 / 2, Air flow 84 m3/h & Noise 36 dB(A) as a rear exhaust. I am using stock cooling on the leadtek 6800GT however it comes with the absolute best cooling solution I have ever seen stock on a card & is very beefy. My CPU is cooled by a Zalman all copper 7000 92mm HF combo.

CPU-Z Report

--------------------------------------------------------------------------------

CPU-Z version 1.26.

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 2.80GHz
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 3500.3 MHz (@1.7 volts)
Clock multiplier x 14.0
Front Side Bus Frequency 250.0 MHz
Bus Speed 1000.1 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 3500.3 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 ASUSTeK Computer Inc.
Motherboard model P4P800SE, Rev 2.xx
BIOS vendor American Megatrends Inc.
BIOS revision 080009
BIOS release date 02/17/2005
Chipset Intel i865P/PE/G/i848P rev. A2
Southbridge Intel 82801EB (ICH5) rev. 2
Sensor chip Winbond W83627THF
FSB Select 800 MHz
Performance Mode disabled
Graphic Interface AGP (@1.5 volts)
AGP Status enabled, rev. 3.0
AGP Data Transfert Rate 8x
AGP Max Rate 8x
AGP Side Band Addressing supported, enabled
AGP Aperture Size 256 MBytes

Memory
DRAM Type DDR-SDRAM
DRAM Size 1024 MBytes
DRAM Frequency 250.0 MHz (@2.75 volts)
FSB:DRAM 1:1
CAS# Latency 2.5 clocks
RAS# to CAS# 3 clocks
RAS# Precharge 3 clocks
Cycle Time (TRAS) 6 clocks
# of memory modules 2
Module 0 DDR-SDRAM PC4400 - 512 MBytes
Module 1 DDR-SDRAM PC4400 - 512 MBytes

Software
Windows version Microsoft Windows XP Professional Service Pack 2 (Build 2600)
DirectX version 9.0c


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 Post subject:
PostPosted: Tue Mar 22, 2005 11:30 pm 
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Posts: 24339
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"Stable except in 3D games however it does not shut down nor does it give me the blue screen. Runs fine just has odd artifacts, consisting of black flashes, that it does not have at lower clock speeds."

That's not "fine" and are obviously you're not running a good OC. If things are screwing up, it's bad. Loosen up the timings on those things, as 2.5-3-3-6 is too tight for 265Mhz. The fact that it goes well again at 250 goes to show that you're asking too much with those timings.

Hey, not everyone can just walk past 255Mhz, so you may have to accept defeat.


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 Post subject:
PostPosted: Tue Mar 22, 2005 11:58 pm 
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Posts: 277
Location: Magee, Mississippi
Loosening the timing to 3-4-4-8 helped it stable out @ 260MHz however I am getting faster benchmarks with the tighter settings on 250MHz. I don't think of it as a defeat as i am running quite fast for an air cooled system, I just cannot break the 3700MHz barrier which was my goal. 3-4-4-8 is as loose as my mobo/memory settings go or it would be np,the G.Skill is rated for 3-6-6-11 @ 277MHz.


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