4.3Ghz Shows as 32Mhz in Windows ?

[Alan641]

I have recently built a P4 641 PC for video-editing work. Briefly...

CPU - P4 - 641 3.2Ghz rev. DO

Thermaltake Silenttower CPU Cooler

M/board - Asus P5LD2

Memory - 2 X 1Gb Corsair DDR2 PC2-5300 (667Mhz)

I chose the old HT processor rather than a core duo as the long pipeline P4 HT's are well suited for rendering video.... and for value per Ghz , at about £50-00 this "previous generation" CPU was a bargain I thought.....

As the bios on this board has some excellent O/clocking features,... and a faster CPU will reduce video render times, I have tried some tentative tweaking in the bios rather than the supplied A1 Booster Windows app, as I liked the idea of locking the PCI-E and PCI buses.

So with PCI-E locked to 100Mhz, and the PCI locked to 33.3Mhz... DDR frequency and voltage, and Vcore set to Auto, I proceeded to increase the FSB from the default 200, keeping my eye on temps with Asus PC Probe and testing with Stressprime 2004 Orthos ver. 0.41.110.18

First Blend - stress CPU and memory tests in Orthos shortly after assembly at FSB 200 = 3.2Ghz showed max temps of CPU 52C / M/board 30C... idle - was 30C / 28C

Then 3.53Ghz... Cpu 58C M/B 33C

Finally 4.05Ghz... aborted after 16mins when CPU hit 60C running Orthos..

I reset the FSB to 230 and have used the PC daily at 2.53Ghz for the last couple of weeks, temps are obviously lower working and rendering in Premiere Pro. but as render times have been shorter even with this small overclock, I decided this week to have another tweaking session.

I popped into one of my local PC shops recently to pick up another case fan, and as suddenly they have become very anti-overclocking, they had a bargain box of bits and pieces by the door, where I found a new Thermaltake Silenttower cooler marked down to £8-00

I had decided to purchase a Scythe cooler after christmas, but decided not to look this gift horse in the mouth,and give it a try.

so after working up to an FSB of 268, Orthos has been testing the system for 2 hours now with a CPU frequency of 4.293Ghz a steady temp of CPU 50C/51C - M/B 22C.... closed case with two 12cm case fans... vcore on Auto is showing 1.34v to 1.36v

So why not 4.3Ghz I hear you ask.... cos' when I increase the FSB to 270, this displays as 4.32Ghz in the bios,... but only 32Mhz in Windows Sys Properties and Orthos ?????? any ideas folks.

Also, as the system is stable at 4.293Ghz, do you think that the temp at this frequency is acceptable for day to day use.... 26C idle and general use, 27C/28C... rendering video 54C max... the max recommended temp for this CPU is 64.1C Do you think that frequently reaching only 10C below this max for perhaps 1 to 2 hours at a time is acceptable ?

Any answers, comments will be greatly appreciated

Regards,... Alan.

 

[FarFarAway]

Temps are alright, try CPU-z for speed reading

 

[Alan641]

Thanks for the quick reply Kempez, particularly regarding the temps.

I downloaded CPU-Z as you recommended, but even at default bios settings - 3.2Ghz... CPU-Z is reading my multiplier as 12X, rather than the correct 16X and a correspondently lower clock speed. May download another copy, as up to 4.293Ghz, Windows recognises the higher clock speed, and video render times do improve compared to 3.2Ghz.... the Bios always reads the correct clock speed however high I set the FSB.

Thanks again.... Alan

 

[jabski]

try everest. That will be right in one of the 3 places it tells you your clock speed

 

[Alan641]

Cheers Jabski... have just downloaded an earlier version of CPU-Z to try... will try Everest too. I want to sort this as I think this CPU has a lot left to give,... even air-cooled.

Thanks... Alan

 

[Alan641]

Everest does seems to show the correct CPU speed,.... 4.650 at 290FSB....

http://upload.overclock3d.net/dwn/171439542906/everest_4650_cpu.jpg

Asus A1 also displays a CPU speed more relevant to the increased FSB.... 4.64 which is also the speed shown on the bios startup screen...(am not using the A1 app to o/clock)

....

http://upload.overclock3d.net/dwn/171439542906/asus_a1_4640_cpu.jpg

Orthos at this setting is only testing 400 iterations rather than the usual 4000 when testing up to 4.293... and showing CPU speed as 352Mhz as is Windows Sys Properties ? ? ?

http://upload.overclock3d.net/dwn/171439542906/orthos_4640.jpg

Alan.

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