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I can't get my P4 3.0 (630) above 3.8 GHz - Page 3

post #21 of 40
Quote:
Originally Posted by harvs
Thanks for the tip. I've updated it. My ram is a OCZ Value Pro PC2-4200 DDR2 1024Mb/1Gb (2x512) . I can run it all the way up to 667mhz (4-4-4-12 @ 2.2v) but I wanted to keep the ratios 1:1 . My fsb at the moment is at 250 so I put my ram to 500mhz.
In an ideal world running 1:1 ratio is prefered but for true overclocking Ghz is the king. Run a divider (5:4 say) and try to increase the CPU frequency a bit more.

Intel chips are less fussy when it comes to tight memory timings and dividers

If i ran my CPU 1:1 I would only get an overclock of 2640MHz but on a divider I can run upto 3600MHz so far.

Just a thought
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post #22 of 40
Thread Starter 
Quote:
Originally Posted by MjrTom
In an ideal world running 1:1 ratio is prefered but for true overclocking Ghz is the king. Run a divider (5:4 say) and try to increase the CPU frequency a bit more.

Intel chips are less fussy when it comes to tight memory timings and dividers

If i ran my CPU 1:1 I would only get an overclock of 2640MHz but on a divider I can run upto 3600MHz so far.

Just a thought
Thanks MjrTom, I've always had the impression that 1:1 is the only way to go. I'll try to go higher with my clock speed without worrying about ratios at the moment. Will ratios other than 1:1 cause any noticeable problems?
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post #23 of 40
Thread Starter 
I'm starting overclock higher than 3.75 without the 1:1 devider now. I have a few settings in bios that I'm unsure of. They are listed below

1.LDT Frequency. Default at 4x
2.ACPI Suspend Type. Default at S1&S3
3.PEG Link Mode. Default Auto
4.PEG Root Contrl. Default Auto
5.PEG Buffer Length. Default Auto

Apart from that, I can't find any options to lock my pci-e or pci at 33.33/66.66. Does this mean that the frequencies are already locked?
Also, when I play around with the ram timings, I usually change the first 4 values (i.e 4-4-4-12) and I leave the last 2 timings under auto. Does this affect the overclock?

I've added some bios screen shots. Sorry about the quality as I used my mobile's cam



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post #24 of 40
Quote:
Originally Posted by harvs
Thanks MjrTom, I've always had the impression that 1:1 is the only way to go. I'll try to go higher with my clock speed without worrying about ratios at the moment. Will ratios other than 1:1 cause any noticeable problems?
In an ideal world running your CPU/DRAM frequencies symetrically (1:1) would be best but you will be limited on your overclock that way.

As far as i am aware (w.r.t S775) running a divider will have little or no effect on stability as you can keep your memory frequencies within its operating parameters while increasing your CPU frequency.
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post #25 of 40
Thread Starter 
Quote:
Originally Posted by MjrTom
In an ideal world running your CPU/DRAM frequencies symetrically (1:1) would be best but you will be limited on your overclock that way.

As far as i am aware (w.r.t S775) running a divider will have little or no effect on stability as you can keep your memory frequencies within its operating parameters while increasing your CPU frequency.
Thanks for the info MjrTom. I tried increasing the fsb to get a higher overclock than 3.8GHz but I couldn't. I now am confident that I need a new motherboard if I'd want to get higher overclock speeds. Thanks for your help and to all who posted to help me out. Rep points for everyone!
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post #26 of 40
i dont think you need to buy a new motherboard, 3.8 is a nice overclock for that chip, i can get 4 max out of mine. That might be as far as yours will go.
Thats a nice setup, spend your money on some nice cooling and case mods ++
Your system is nice and your mobo is quite new, no need to buy another one.
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post #27 of 40
ur not above 3.8 @ 267mhz? did i miss sumthin? w/ that multiplier u should be at around 3.95 er so at that fsb. I run the same chip @ 3.93ghz daily on a crappy ecs RS400. FSB @ 261 {board limited} vcore at 1.50, w/ ddr2 800. long as u keep your temps in check the 630 clocks like a champ.

ps. -> zalman reserator = the bomb
post #28 of 40
Thread Starter 
Quote:
Originally Posted by CL3P20
ur not above 3.8 @ 267mhz? did i miss sumthin? w/ that multiplier u should be at around 3.95 er so at that fsb. I run the same chip @ 3.93ghz daily on a crappy ecs RS400. FSB @ 261 {board limited} vcore at 1.50, w/ ddr2 800. long as u keep your temps in check the 630 clocks like a champ.

ps. -> zalman reserator = the bomb
The max my fsb can go up to is 250mhz. My 630's multiplier is 15. Thus, 250X15=3750 a.k.a 3.75ghz. It'll take me up to 3.8 but it won't pass memtest or prime95.

Thanks for the advice Olly! I might hold on to the board for a while. I guess i'll spend my money on a raptor . Cooling shouldn't be a prob as I idle now at 34 and peak at 42 (prime95 8 hrs). All I did was lapped the stock cooler. Best value for money.
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post #29 of 40
Thread Starter 
Ok people..brace yourselves for this..i've managed to find a fix to overclock my 630 3.0 to 4.0 easily on the p5nd2-sli.

Go under "Chipset" setting and change the LDT frequency from 4x(default) to 3x.

It has something to do with hypertransport speed from 800mhz (4x200) to 600 (3x200).

I can easily overclock to 4.0 and windows starts. but there is some stability problem.

I've now set my clock to 3.85 at 1.45 vcore
ram at 513 @ 2.0volts
fsb at 256.7
running a devider to 1:1
memory timings at 3-3-2-4

Idle temp @ 38deg C
Load temp @ 49deg C

CPUZ Verified http://valid.x86-secret.com/show_oc?id=88443

Hope this helps!
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post #30 of 40
Thread Starter 
Quote:
Originally Posted by CL3P20
ps. -> zalman reserator = the bomb
what temps are you getting??
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