Hit the wall at 235

[Circaflex]

Well i think ive hit the wall with my fsb at 235 giving me 3.3ghz, not sure what else i can do. Ive done the following:
2.8C M0 with the sl6z5
P4C800 Deluxe
1gb matched pair kingston hyperx pc3200
Zalman cnps7000alcu

Now i have done the following:
fsb 235 (giving me 3.3ghz)
5:4 Ratio with ram running around 188
Timings are at 2-2-3-6
Vcore at 1.65
Vdimm at 2.85
agp voltage at 1.6
disabled spread spectrum
disabled ich delay transaction
performance is on standard
and my temps are really good idle 23 load nothing above 35
Northbridge cooler is passive (some say this makes a big difference not too sure though)

Now i cant seem to get past 235 stable, im stable right now im able to benchmark and play games fine but after 235 its a no go, i did memtest on stock speeds and this and they passed i also have done the sandra burnin wizard and it was fine, my question is what can be holding me back? Should i maybe let spd determine the timings?


Ive also had some great help from one member on the board through pms, and i was wondering if anyone else had anymore suggestions?

 

[flapperhead]

u probably hit the cpu's max. but to be sure run your memory 3/2 then see how far your cpu will oc...

 

[Grandpa Dan]

u probably hit the cpu's max. but to be sure run your memory 3/2 then see how far your cpu will oc...

I don't think that's it(the 3:2). His memory is underclocked now. Try swiching performance to both turbo or auto and see if anythings changes.You may have "hit the wall" as you said.

 

[Lancelot]

Set your performance mode to 'TURBO' and 'ENABLE' ICH delayed transactions, otherwise you're taking a performance hit

Now did you even raise the Vcore on that CPU? You're not mentioning that anywhere...

 

[krag]

Set your performance mode to 'TURBO' and 'ENABLE' ICH delayed transactions, otherwise you're taking a performance hit

Now did you even raise the Vcore on that CPU? You're not mentioning that anywhere...

What is "ICH delayed transactions?" I know of a "delayed transaction" in the memory bios settings but I have never heard of a ICH delayed transaction.

 

[Grandpa Dan]

'ENABLE' ICH delayed transactions, otherwise you're taking a performance hit

I've tried it both ways and didn't notice any performance hits. It does seem more stable on my system disabled though.

I'm gonna run some benches, this has got me thinkin'. Any idea where the "hit" occurs(bandwidth, hard drive, etc.)?


Edit: Did some benches. Only changed the "ich" setting. Enabled vs. disabled, enabled scores about 50 points higher in ctiaw. Disabled scores about 150-200 points higher in sandra and still seems more stable.