(Help) P5B Deluxe get stuck at 470FSB !...

[911us]

I just bought P5B Deluxe last week.It 's 1.03g version,chipset ver is C1 and v-nb max out is 1.65v.I can't go higher than 470+FSB.I don't know what te hell happening,it 's really kill me up.I tried to change ratio,do everything but no help.My comp is:

_Bios 0804
_P5B De 1.03g (all voltage setting is max,NB artic-silver 5+fan added)
_E6400 (on watercooling,idle = 33 C,load = 45)
_2*1g Geil PC1000 4-4-4-12 2.4v
_x1900xt
....stay at 470,even changed ratio to 6 (stuck 470*6)

I heard some report that pci-e video cause this problem ???

[shifty803]

I make it to about 507 fsb on mine before I can't go anymore, possibly due to maxing out my processor. You should try lowering your vNB to 1.55 and your termination voltage to 1.4. I can run 100% stable at 507 with vNB at 1.55, but can't even get to windows with it at 1.65.

It is also possible your processor won't let you go any futher. It isn't every e6400 that will hit 4000 mhz. Lowering the processor multi will thrust a higher clock speed on to the NB because of the strap issue, so that doesn't really tell you anything. As far as the NB is concerned, the theory is that the mobo clocks best at the processor's default multi.

[dnottis]

After using a bunch of C2Ds, it's the processor. The 6300s I've used OC'd higher than the 6400s and all these C2Ds hit their limit and wont go any further even if the volts are low.

Try another CPU and you will find it's not the board.

BTW my best 6300 walls at 516 prime stable. 1.4v, 1 notch higher and all hell breaks loose and this is on the P5B-E and a DS3 - both boards got me to the exact same place.

[911us]

thank guys,may be I will need a new cpu.Someone told me that I should try a pci video card but right now that is no need !...

[Kakulukia]

Set Vsb to 1.7V, that gives a little FSB boost.

It could also be the limit of ur cpu, not all cpus can get >500

[MrDeeds]

After using a bunch of C2Ds, it's the processor. The 6300s I've used OC'd higher than the 6400s and all these C2Ds hit their limit and wont go any further even if the volts are low.

Try another CPU and you will find it's not the board.

BTW my best 6300 walls at 516 prime stable. 1.4v, 1 notch higher and all hell breaks loose and this is on the P5B-E and a DS3 - both boards got me to the exact same place.

Please, i disagree. The only limitations on a c2d cpu itself are volts and cooling. Theres a certain point where there are no gains on air but if you move up to water cooling then theres a new limit, next is phase and even more if you move up to bench cooling solutions like dry ice and ln2. The worst c2d will scale better with more volts and cooling that is sufficient for the voltage. You also have to consider the week because the newer cpus are almost a night and day comparison with the older ones. Es cpus withstanding.

@911us
I would check out the P5B-D thread and see if they have any insight on what could be holding you back. I am curious at to what cpu vcore your using.

[dnottis]

Please, i disagree. The only limitations on a c2d cpu itself are volts and cooling. Theres a certain point where there are no gains on air but if you move up to water cooling then theres a new limit, next is phase and even more if you move up to bench cooling solutions like dry ice and ln2. The worst c2d will scale better with more volts and cooling that is sufficient for the voltage. You also have to consider the week because the newer cpus are almost a night and day comparison with the older ones. Es cpus withstanding.

You are soooo wrong.... check some of these threads, people hit fsb caps all the time. obviously you havent had any bad conroe overclockers. Ive had 5 conroes now, how about you? My buddy had one that was capped at 450 on a s3 we assumed it was the d9 limitation... so i put it on my p5b-e (that my chip does over 3.6 on) and low and behold 450 was still the limit.

Disagree all you want - your 100% wrong.

[Viss]

Tried 2 cpu's. Same board/bios/mem/cooling. 1st did 512 fsb max, second 555..

[shifty803]

My processor seems to be mobo limited, which is wierd, because most P5B-Deluxes don't have a cap so low I thought.

I can boot at 507, but try any setting at 508 fsb and I can't pass even one iteration of prime95 blend before the system locks up. 510 I can't even get into windows.

I know my ram does at least up to 540 mhz dual channel, and I've tried this with the cpu multi at both 6 and 7 to the same result. I guess my board just isn't that good?

Edit: fixed an error

[dnottis]

My processor seems to be mobo limited, which is wierd, because most P5B-Deluxes don't have a cap so low I thought.

I can boot at 505, but try any setting at 506 fsb and I can't pass even one iteration of prime95 blend before the system locks up. 510 I can't even get into windows.

I know my ram does at least up to 540 mhz dual channel, and I've tried this with the cpu multi at both 6 and 7 to the same result. I guess my board just isn't that good?

thats sounds like you CPU hitting it's limit too. I hit that point at 516, 517 will reboot the machine during prime. 516 is fine.

[shifty803]

Hmmm that could be. From what I've read yesterday about the strap issues being a little different than Tony first thought, it seems like maybe my mobo should boot at 6x multi and 510 if it were the processor. Or is that not correct?

Oh, and in your opinion, which processors clock the best? Old or new? From the stuff that I've read, it seems like the old ones do...

[xgman]

With an x6800 the limit is more like 450, so don't feel so bad.

[shifty803]

Oh I don't feel bad... It is all academic since I barely feel comfortable running my C2D at 3.5 mhz... too much wattage at that setting. Something like 175+ watts from the processor alone. My cpu block only does about .14-.15 C/W so even with water my core temps are up in the 50s. I really would rather stay under 50C for 24/7 operation.

I just wanted to put that stable 100% OC in my sig if possible

[dnottis]

Hmmm that could be. From what I've read yesterday about the strap issues being a little different than Tony first thought, it seems like maybe my mobo should boot at 6x multi and 510 if it were the processor. Or is that not correct?

Oh, and in your opinion, which processors clock the best? Old or new? From the stuff that I've read, it seems like the old ones do...

If its the CPU then dropping to 6x you will still hit the limit at 505 FSB, however it is possible that 3.5 is the max CLOCK speed your chip will run stable at. So you've got the overall speed limit and then most of these chips hit a FSB limit.

Well from the two B revisions I had, my A in my sig has been the best. Running 3606 @ 1.4v. Too bad my cap is 516 FSB though, as this chip seems like it could go further. I would say it's all luck, some of the Bs have been great, but get a good week A and you'll be sailing too!

[shifty803]

What do you run yours at 24/7, just out of curiosity?

[dnottis]

What do you run yours at 24/7, just out of curiosity?

I was just using a DS3 and came back to the P5B-E. For 24/7 I have been using 3570 (510 x 7) @ 1.36v. Load on the P5B-E hits about 46, on the DS3 it was showing about 42. 515 is prime stable but temps were hitting 52c on water. I have been sticking with 3570 for my 24/7 just because of heat and voltage.

Here is my prime shot at 515.
(http://www.3dxtreme.net/other/C2d/new/3602-auto.jpg)

[shifty803]

Yeah that is exactly the temp that was on mine - 52C with about 3535 mhz.

I have been running it at 3150 mhz, just because with my graphics card, the processor is definitely not the bottleneck. Doesn't usually go over 43C or so load on core temp with that clock. I want to hold out for one of those nasty DX10 cards next year and maybe I'll see if pusing it to 3500 all the time gives me much of a boost once the onus is back on the processor.

I'll also need a big PSU at that point.

[MrDeeds]

You are soooo wrong.... check some of these threads, people hit fsb caps all the time. obviously you havent had any bad conroe overclockers. Ive had 5 conroes now, how about you? My buddy had one that was capped at 450 on a s3 we assumed it was the d9 limitation... so i put it on my p5b-e (that my chip does over 3.6 on) and low and behold 450 was still the limit.

Disagree all you want - your 100% wrong.

Every cpu has its own individual fsb limit but what I was saying is that the supposed fsb limit your hitting with your setup could be easily surpassed with better cooling, different memory, or a new board. The cpu you have in your sig does 3.5ghz at only 1.4v, you can't seriously tell me that cpu wouldn't go higher under phase.