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Need some help with OCing my rig

A

Avengeance

Gawd
Joined
Apr 10, 2004
Messages
773
Well I am having a little bit of a problem OCing my computer. Here are my specs:
AMD XP 2500+ Mobile
Abit NF7-S 2.0
Corsair 1gb (2x512mb) pc3200 (running dual channel)

For some reason I cannot pull off 220mhz FSB. Do i need to loosen up my timings for this? Cause right now they are at 11-3-3-2.5 I have gotten this processor to run 2.5ghz at 1.75 volts. At that clock it runs all my games fine, but when i prime it, it usually fails after a few hours. Temps never are an issue either. I am kind of new to this whole overclocking thing so I dont know everything I need to be playing around with, and I dont really know what the timings do so if anyone would care to explain that would be great :) Thank you for your help.
 
Try either setting the timings to By SPD or to CAS3 to see if that helps. Also, what are you running your VDIMM at? Generally you need to bump it up nicely in order to get a stable OC. Mine runs at 225Mhz FSB if I bump it up to 2.8v, but anything lower is unstable. Good luck... :D
 
Yep, bump VDimm. Your mobo (NF7-S) really has some legs when it gets more voltage there...and since your max Vdimm is much higher thant 2.8 (like in my A7N8X), I suggest that you even set it to 2.8Vdimm right now, and see if you can get it even higher.
 
I put my VDIMM to 2.9 and then tryed 220 FSB with no luck... And as far as timings go I seriously dont know anything on how they work. So I dont really want to tinker with them until I find out what each one does.
 
Tinkering is how you learn. I know it's a pain, but you have to play with the settings until you find out what works for your board/CPU/RAM combo. Everyone told me to put mine at CAS 3 and all other settings as loose as possible and tighten up from there, but my system won't even POST with the RAM set at CAS 3. If I set it at By SPD it works flawlessly. I don't think there's any "one setting fits all" that covers all combos of hardware you may use. You have to go in and tweak things until you find out what works and what doesn't. If you set it at something and it doesn't work, worst thing that'll happen is that it doesn't boot and you have to use the reset CMOS jumper to put your BIOS settings back to default.
 
First of all does the timings increase performance? Seccond of all what do you mean by SPD? Thanks for all the help :)
 
When you go to your BIOS to set your RAM timings, there should be a place to select (something like) manual or auto for the configuration. Auto would be the same as By SPD (meaning it'll read the info from the chip to determine the best settings). Manual would allow you to change each setting on your own. Generally, the lower the value of the RAM timing, the better the performance. On the other hand, the lower the setting, the higher chance of instability on your system. That's why I say you have to play around and see what works best for your setup. I would think your next step would be to either set it at auto or manually setting it to 11-3-3-3, to see if that would allow you to hit 220Mhz.
 
11-3-3-3 didnt let me boot into 220MHZ. I guess I will try some more stuff later when I get home from work.
 
I would try 11-4-4-3, actually... I'm running some shitty RAM at 225MHz on the NF7-S with those timings, I think... Maybe even 9-4-4-3.
 
still wont boot with a 220mhz fsb :( even on 11-4-4-3 i will try some other stuff tho. thanks for the help :)
 
Maybe there is something wrong with my computer? I have tryed loosening the timings so much and it still doesnt work. Am i missing something? Lets say i was starting with a new bios... what stuff would i need to change?
 
If anyone wants to IM me on AIM please feel free to... im kinda stuck at this point. My aim name is hockeyzlife85
 
Have you memtested your RAM? I suggest doing that before changing any other settings.

http://www.memtest86.com/#download1

Get the 3.1a version and make a bootable CD. And of course, set the CD-ROM to be booted before HDD-0 in bios so it will boot.

If your memory returns errors at THAT fsb (220 or if you can't 219 or 218), then you know it is the Corsair memory at fault. Of course, if there are no errors, there is nothing left but more voltage to add-- raising Vcore, raising Vdimm (NF7-S can go up to 3.2 rite?), and chipset voltage.
 
Well i have the XMS memory so im sure it can go pretty high (dunno what people have been getting on it) i have the C2TP model.
 
When i say boots i mean POSTs. Sometimes my comp wont even post at 220mhz fsb. But sometimes it does get pretty far in the posting then crashes, and then sometimes when i restart i get some sort of ram bios thing or something.
 
To be exact, it says:

R350 Samsung DDR Bios and then a part number.

The only thing i can think of thats samsung DDR would be my video card.
 
Dude if you are failing to even POST consistently, I would back off immediately from that FSB.

You are risking BIOS/Windows corruption if you keep on doing that.
First, find a FSB that consistently boots into windows--start from there. You probably will have to lower it more or raise the Vcore to get that stable.
 
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