XP 1600 o/c problem

[SteveDeBeave]

I built a new XP1600 up yesterday. Decided to try overclocking for the first time and went with the FSB changes.

Took the FSB to 160mhz and the CPU voltage to 1.8v. When I booted up I had a problem with what looks like the video card. No screen and got a box telling me it was going into sleep mode.....or something like that?

Anyway I had to clear CMOS and change back to 133mhz.

Should I have changed the voltage for the DDR or AGP? It was in the auto mode. Did I miss something??

XP 1600
MSI KT4V
256 DDR 2100
Radeon 7000 64 DDR

 

[aircooled]

Does your motherboard support 166 FSB with a 1/5th divider...(sorry I'm not familiar with your mobo)?

If not, your PCI bus is probably what cant handle the o/c rather than the chip. Most all 1600+'s shipped in the last several months can handle the 166FSB o/c. The motherboard is usually the limiting factor. Make sure your mobo can accept the 166FSB with a 1/5th divider and you are almost guaranteed 1750 from this chip.

 

[SteveDeBeave]

KT4VL board supports up to 280mhz FSB.

No user setting for divider, 133=1/4, 166=1/5. I guess these are factory settings that can't be changed.

I was able to get up to 159mhz for around 1669mhz with the XP 1600. If I went up to 160 problems started.

 

[jaybee]

Set it to 166 and 1.85v. Fire it up. Try 1.825v if that works, then 1.80v. Not sure you're getting 1/5 pci at < 166. Make sure you Prime test it when you get it up.

jaybee

 

[BobTheWizard]

Set it to 166 and 1.85v. Fire it up. Try 1.825v if that works, then 1.80v. Not sure you're getting 1/5 pci at < 166. Make sure you Prime test it when you get it up.

What is "Prime Test"?

I've been playing with the settings on my XP1600 and EPoX 8K7K2+.... still trying to get all the different settings just right.....

 

[SteveDeBeave]

Originally posted by: jaybee
Set it to 166 and 1.85v. Fire it up. Try 1.825v if that works, then 1.80v. Not sure you're getting 1/5 pci at < 166. Make sure you Prime test it when you get it up.

jaybee

I tried getting this chip up to 166mhz w/ 1.8v and it would not work w/ this board. Could not even get 160mhz w/ 1.8v stable.

So I read your post jaybee and went for 166mhz w/ 1.85v......thought what the hell. It booted no problem and everything seems stable. I've not run Prime yet, I'll get around to it when I have time. Temp is 51c idle.

 

[Necrolezbeast]

1.85v seems a bit high. The reason 160 isn't working is because your pci/agp are way out of spec. Are you usign any onboard stuff; audio, nic, firewire...? If so that may be the problem, if not then you might want to try to disable these in the bios and see if it works.

 

[Mardeth]

Originally posted by: BobTheWizard


What is "Prime Test"?

Prime test is basicly a program which puts your CPU really at work and with that creates heat and tests if your system is stable. Running Prime for a few hours straight with no problems indicates that your system is stable and safe to use.

You can get the program here.

 

[SteveDeBeave]

Originally posted by: Necrolezbeast
1.85v seems a bit high. The reason 160 isn't working is because your pci/agp are way out of spec. Are you usign any onboard stuff; audio, nic, firewire...? If so that may be the problem, if not then you might want to try to disable these in the bios and see if it works.

I have the o/b lan running with this board.

I just ran Prime95 for two hours and everything is fine at 1.85v. Temp hit a max of 58c. I think I'll just leave everything right here for now, 1754mhz that's pretty good for a 1400mhz chip! 😉

 

[Necrolezbeast]

I have my 1600+ stable at 166fsb with only 1.775v, on a MSI kt3 ultra2. I chose not to go with the kt4 ultra because the kt400 chipset still has a few bugs needing to be worked out...