8KHA+/XMS 3200/Unlocked XP/ no 166 synch...help needed...

[Simba]

I've scoured your excellent forum for the past couple of days and finally decided to post when I couldn't find an answer to my dilema....hopefully someone here can help me achieve OCing goodness...

I believe I should be able to run 166FSB and above synchroniously with the components I have listed below, however, I cannot for the life of me get my system to even post @ 166FSB synch. It'll count the RAM and then stop...

I've had the CPU OCed at 181 x 9 with my RAM @ 137 with no problems but 166/166 or higher eludes me.

I've had my CPU at 1.85 but the highest I've taken my DDR is 3v, would 3.2 fry it? I've also used just about every combination of memory timings on the board except 5t.

Am I missing something here? Any help would be appreciated...

Thanks in advance...

[Superman]

Did you try a different stick of DDR? I'd put money on that as the problem if you can get all the other components to run at 181Mhz. It's not any other component, as they'd all be at 33.3Mhz @ 166Mhz sync.

[Simba]

I had tried a stick of Samsung 2700 Original from a bud and 166 was a no go also. Do you think I got a lame board?

[K6-III]

Which bios???

[Simba]

The latest:

2612

Thanks for the replies and interest guys !!!

[Nico67]

How high can you get to synchronously?try 140 and move up in 3 mhz steps, that might give some other indications.

[RobsTV]

XP1700+ CPU's are not the best overclockers.
Have you tried lower multiplier's? You are near the limit for XP1700+.
Normally run my XP1700+ in 8kha+ at 167x9, and the best it will do is 171x9, 1:1
No combination will get it running over 1600MHz.
With mem at SPD, was able to boot at 200x8, but not windows stable.

My 1700+ will be swapped out for XP1600+ later this week, and I suggest you do the same if possible.

[Simba]

Synchronously I can run at 162 x 10 all day long. That's what I'm running now.

I finally ran it last night at 166 x 9 but had to bump my Vdimm to 3.2 with my memory settings at 2-3-3-5-1. I tried more relaxed timings and it would not boot...go figure.

If I can run 162 x 10 (1620) shouldn't I be able to run 9.5 x 168 (1596)?

I ran some Sandra Memory Benches and was close to 2500 !!!

The need for speed is killing me....

[Lionfish]

With my XP1600+/early one, with the mem set @ spd it will do 190fsb but set at 133 it will only do 170fsb STABLE with Crucial PC2100, so yup looks like you have a cr@ppy CPU also.

[Simba]

I'd be thrilled to get 171 x 9 synch...

I've run 180's x 8.5 with SPD but the memory performance sucks...

Is 3.2 Vdimm gonna fry my memory?

[LORD]

Place the 2314 bios in and it should work.

:clown: 2612 has serious issues IMHO.

Hope this helps,

[BobyJo]

I would recommend the XP1800+, or MP1800+ the MP comes unlocked so you can set the multiplier to whatever you want.
The XP1600 is also a great choice.
Seems as the odd numbers are not as good at oc'ng as the even #.
I have been running my MP1800+at 166 for a week in an Abit mobo. Earlier it was in an Epox 8K3A, and it ran at 166 there for a couple of weeks.
The temps of the cpu is in the mid 30c.
This is at 1.67mhz, man you can't knock that.
I do have a super cooler (air) and adequate fans to keep the system cool.
This includes the vid card and memory also.

[LORD]

Originally posted by BobyJo
I would recommend the XP1800+, or MP1800+ the MP comes unlocked so you can set the multiplier to whatever you want.
The XP1600 is also a great choice.
Seems as the odd numbers are not as good at oc'ng as the even #.
I have been running my MP1800+at 166 for a week in an Abit mobo. Earlier it was in an Epox 8K3A, and it ran at 166 there for a couple of weeks.
The temps of the cpu is in the mid 30c.
This is at 1.67mhz, man you can't knock that.
I do have a super cooler (air) and adequate fans to keep the system cool.
This includes the vid card and memory also.

8KHA+/XMS 3200/Unlocked XP/ no 166 synch...help needed...

[Lionfish]

Originally posted by Simba
I'd be thrilled to get 171 x 9 synch...

I've run 180's x 8.5 with SPD but the memory performance sucks...

Is 3.2 Vdimm gonna fry my memory?

Mine is @ 2.9 I wont go any higher without cooling on it.

If you want you might try Thermaltake Active cooling

I have not heard how well it works though.

[RobsTV]

I second (or third) the changing bios away from 2612.
2612 messes up mem speed cas settings, and becomes unstable.
Went back to 2529, and all was well again.

For my 8kha+ 2314 was not as good as 2529.
Close, but slight edge to 2529.

And you should be getting Sandra scores around 2500/2300 at 167MHz. When I go to 171MHz, Sandra scores 2591/2385.:-D (vcore: 1.85, mem: 3.0v, 171.82x9 = 1546MHz)

Not all Samsung 2700 Original is the same.
If anything is leaning toward the bad side, I would suspect the memory, as your ability to overclock higher with increased mem voltage indicates memory is a weak spot.

[Simba]

I'll give 2314 and 2529 a shot and report back...

[Simba]

OK...got 2314 in my rig and I could muster 9 x 167 which is better than I was doing before.

It'll only run that at 3.2 Vdimm regardless of the timings I set.

I've tried 133 SPD to 133 2-2-2-5-1 and they all need 3.2 to run...

Guess my DDR is going back....

Thanks for all the feedback and I'll report back when I get a new stick in...

[Nico67]

Sounds like you may indeed have a RAM problem, but have you tried the RAM all of the Dimm slots?. It may be one or more slots aren't that great.

[Randell]

umm someone said 166fsb = 33.33PCI. I thought it was established theere isnt a hidden 1/5 PCI divider in the 8KHA+?

[RobsTV]

I don't think anything has been firmly established about divider.
Old Geiger doesn't show divider as present.
O'Scope does indeed show divider as present.

But, it is NOT present for a fact if you run mem at 1:1.
This is easily determined by benchmarking at 164MHz through 168MHz.

It "may" be present when you select SPD, but that's hard to tell as performance drops off due too lower memory speeds at same time.

So even "if" it is present, (and most that can run 190MHz-200MHz fsb think it is), it is not too useful as overall performance is increased at a lower fsb with memory at 1:1, (not using SPD in Bios).