View Full Version : Regarding 2.8E
I don't know much about the relationship between the PSU and the CPU, but I'm fairly confident that my PSU isn't sufficient. It's a 350watt something or other I think. What problems can this cause? The computer seems to run just fine (aside from the heat) and will even OC to 3.4 (killing the sound). Is it really that important that I get a better PSU? Or could I just use one PSU for the processor, and one for everything else? Also, how do I onverclock without killing my sound? TurboPLL? Are there guides for this? Thanks in advance.
greenman100
04-19-04, 01:13 PM
Things that would help us help you:
CPU/stepping
Motherboard brand
PSU brand
Sound device
etc.
and no, not turboPLLs. your sound is most likely getting "killed" because your PCI bus is getting messed up, but we'll never know unless you tell us more information.
If you're using the onboard sound, the best way to fix it is the mod some sort of southbridge HS. I cut up an old heatsink and used AS5 and superglue to attach mine on.
To know if your PSU can handle what you have I'd need to know
1) What brand is your PSU? cheap ones don't actually run at 350W... check out the PSU sticky in the power supply forum for more info on that.
2) What do you have on your computer? If your running 4 hard drives and 10 fans with an oc'ed processor then you might have problems. I have a 350W and it handles my computer: I have a cdrom, cdrw, 1 hard drive, one floppy, 8 fans, and last but not least my power hungry P4.
I'm not sure if you would be able to run mult. PSU as I've never tried it before. Some on them have to be connected to the mobo in order to work b/c it completes the circuit. I'm sure the guys in the PSU section could tell you how to get around that.
good luck
yes having a good PSU is just as important as good memory and motherboard... i found i could overclock even more when i replaced my PSU with a good name brand one (fortron in this case).. definitely upgrade that if you think it could be a problem
I don't exactally remember the stepping of my processor, but there is on;y one stepping code for the 2.8Es right now, right? The motherboard is a MSI Neo. I have some rather cheap ram, I think right now (2x256 single channel), The sound is onboard, but I do have a SBAudigy I could use. I don't know about the PSU. I think it might be an enermax. BTW: Wouldn't a turboPLL solve the pci bus / sound card problem? I can't see how that wouldn't help. I know how to tell a PSU to work without a motherboard, it's pretty easy to learn; get an old cdrom drive and hook it up to the power supply, then just short some pins on the mobo connector until you find the right ones. Sorry that this is kinda rambly.
If you have a MSI board you might be able to keep the AGP/PCI clock the same and increase the fsb only- I know my MSI can, so you might check on that before you go with a turboPLL. You should be able to go dual channel if you have two sticks of the same type and size of ram. I think that all you have to do is stick them in DIMM 1 and 3 or 2 and 4 and Bios registers it as dual channel.
Dcasole
04-19-04, 10:02 PM
Alice , I have a 2.8e and an msi 865 pe neo2 LS motherboard and I ran into the same problem you are having . Lock the PCI bus at 66/33 and that should solve your sound problems.
As far as the powersupply my Antec 350 watt would not cut it with the prescott. Mt system would reboot and was just not stable. I had a Antec truepower 430 that I put in and now the system is stable as a rock although I know I should look into purchasing a larger one.
After purchasing some decent memory and upping the memory voltage to 2.7 it has been running stable at 3.59.
I do not know what kind of case that you have but if you want to cure the heat problem take a look at this simple mod you could do as it dropped my temps back to a much more normal 42C at idle.
http://support.intel.com/support/processors/pentium4/sb/CS-008537.htm
Dave
My motherboard was actually rather cheap, so i don't really know what it can do. Not to mention this is my first P4 and I'm not really up on all of the new bios settings. I scraped off the waxy stuff on the heatsink and the processor and put some thermal compound on it. At first the temps were at around 54 idle, and after letting it run for a bit and restarting, it now runs at about 42-44. The motherboard I'm using only has 2 slots for ram, and it says right on the box that it's only single channel. Some help with the bios would definately be nice though; I think the motherboard is a MSI 848p Neo, or something like that.
I looked around on the MSI website (which is rather poorly organized I might add) and then I downloaded the manual for my board (which I am now confident is the 848P Neo). I didn't remmeber seeing a setting for the AGP/PCI clock, but it is in the manual. I'm sure I could clock this thing to 3.4 easilly enough now. One other rhing of interest: The MSI website says that my motherboard doesb't support 2.8 prescots. What's up with that? roadkil's cpuid reports it as a northwood and says it doesn't have hyper threading. Am I missing something here? Thanks for all your help.
Run CPU-Z and see what it says.
Only the new MSI boards support the Prescott, so that might be your problem. As far as I know, only the 865's and 875's are the only series that support it.
CPU-Z detects it properly. Part of the MSI website says it supports the prescott, but another part says it doesn't. It works though, so I feel pretty good. I was checking out the agp/pci lock thing, and it wont lock at 66.66/33.33. Why is that?
(HR)Titan
04-20-04, 04:19 PM
probably it's set to auto
just change to lock or pick 33/66 combination and choose save and exit (f10 and hit enter)
If I set it to 66.66/33.33 at normal speed, it will change with the speed. But if I change the speed first, 66.66/33.33 isn't an option. It doesn't really make any sense to me. I guess when I get home I'll try setting the fsb lower first and then set it to 66.66/33.33. That way it wouldn't see 66.66/33.33 as auto and maybe it would let me keep it that way. Any input (especially from someone with an MSI board)?
Dcasole
04-20-04, 09:11 PM
Alice , my motherboard does the same thing , once you start to overclock the FSB 66/33 is not an option but you should still see one that is real close. I think mine is 67/34 see if you can set it there.
Dave
Yes, I agree with Dcasole. I believe if you choose a ratio between 66.66/33.33 and 80.00/40.00 you should be fine. Anything over that and I think that your usb's and pci devices start acting weird, so just try to get it in there somewhere, lower preferably.
Hope that helps
Yeah, I can get the "67...". I'd just prefer to be at 66.66/33.33. Does anyone know why it wont let me stay there? I'm not really going to seriously overclock this thing until I get something better, but it still ****es me off; kinda like when my agp died, and even though I didn't have an agp card that was worth using, I still wanted it to work. Thanks for all of the help you guys, I think I get the hang of this whole P4 thing now. Oh, one more thing: The 2.8E supports hyper-threading, right? So why didn't it come with a P4 sticker that has the little "HT" on the top rught corner. Kinda makes me mad a bit. Thanks again.
greenman100
04-20-04, 11:29 PM
66=66.66=67.
it all depends on the native frequency of the signal generator.
point:
don't be concerned, get it close.
Did it come with a sticker at all, or did the sticker that you got not have the "HT" on it? The sticker is either on the back of or inside the instruction manual that comes with the processor.
Yeah, but it's not 67.00. it's 67.** (can't really remember). It's good enough to overclock with, but I am a perfectionist with some things.
Yeah, it came with a sticker, but not the HT sticker. I'm kinda confused.
greenman100
04-21-04, 06:07 PM
Originally posted by Alice
Yeah, but it's not 67.00. it's 67.** (can't really remember). It's good enough to overclock with, but I am a perfectionist with some things.
Yeah, it came with a sticker, but not the HT sticker. I'm kinda confused.
that's fine too. it's irrelevant. you'd get a better overclock lowerigny our CPU one degree than lowering 67.** to 66.**
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