Intel Core i5 & i7 Sandy Bridge Overclocking and Feedback

[da20valve]

ITS NOT YOUR PSU set the multi to 44 or 45 and see what happens

 

[cadaveca]

I wouldn't say I have the best PSU, but my PSU should be more than adequate enough for my needs.
And less than 6 months old.

Sure, but cpu will probably be drawing about 140w, add in vga dn other stuff, plus figure PSU efficiency, either you PSU isn't supplying good power, or you board doesn't. It's also possible that you need to drop multi down 1.

PSU looks to be single rail, so yeah, hopefully should be fine, but you are right at the limit, IMHO.

Phase control, yes, extreme so that all phases are available all teh time, rather than them being powerred down when not in full use.

 

[LifeOnMars]

Can phases set to extreme have a detrimental effect over time? Do they degrade. I only ask as at only 4.6GHz I don't need to set them to extreme and don't have any issues but if it's gonna give me a bit more, immediately available power, I'm all for it

EDIT - Just realised "Phases set to extreme!!" sounds a bit Star Trek

 

[cadaveca]

phases at extreme cause fast wear? No, not at all! in fact, it should PROLONG board PWM life as the 4 main phases should not be under as much load with all phases enabled, as compared to a dynamic loading scheme.

 

[LAN_deRf_HA]

I don't know, but the asus guide says to set them to extreme and offers no warning about it. I wouldn't worry about it.

 

[LifeOnMars]

phases at extreme cause fast wear? No, not at all! in fact, it should PROLONG board PWM life as the 4 main phases should not be under as much load with all phases enabled, as compared to a dynamic loading scheme.

Excellent, that makes sense actually. Shall enter the bios now........it still tickles me I can use my mouse in it

 

[cadaveca]

Excellent, that makes sense actually. Shall enter the bios now........it still tickles me I can use my mouse in it

Yeah, even with the little bit of testing I've done, with all phases enabled, idle power consumption for PWM doesn't increase or anything either, but I do have a rather limited supply of boards at the moment to test. I've got a few P67 boards right now, but I've started to not even mention the stuff i buy, for fear that my purchasing choices may affect my opinion. I'll only talk about stuff provided to me for free, now, and that's not much stuff.


Started binning cpus, got 10 onhand to test with, not getting alot of love in the multi department though.

 

[PaulieG]

Yeah, even with the little bit of testing I've done, with all phases enabled, idle power consumption for PWM doesn't increase or anything either, but I do have a rather limited supply of boards at the moment to test. I've got a few P67 boards right now, but I've started to not even mention the stuff i buy, for fear that my purchasing choices may affect my opinion. I'll only talk about stuff provided to me for free, now, and that's not much stuff.


Started binning cpus, got 10 onhand to test with, not getting alot of love in the multi department though.

That's a fair number of chips to bin. What max vcore are you testing up to? Hope you can find a gem in the lot. I finally have one, but I knew it was a good chip before I bought it. Got kinda tired of playing the lottery with chips. I am however getting ready to test another board. Just can't decide on which to start with.

 

[cadaveca]

1.325v is the most I'll give. Chips were bought for builds not my own, so I won't push them, just looking for one better than what I already got(53 multi stable on air). Hope Intel doesn't lower prices too soon, or I'mma gonna eat some losses.

tested 4 so far, 46 max without PLL. crapola, but oh well. All are L050.

 

[LAN_deRf_HA]

In addition continued testing with the PPL option enabled and D2 or retail parts have shown some benefits to CStates being disabled when approaching, at or exceeding a 50x multiplier. An important note to keep in mind is that disabling CStates can considerably affect HD performance ( especially SATA6G ) Please keep this in mind when going for the highest level overclocks.

Has anyone experienced this HDD performance crap? HD tune gives me the same results with and without CStates.

 

[LifeOnMars]

Has anyone experienced this HDD performance crap? HD tune gives me the same results with and without CStates.

Where's that from Lan? I haven't disabled mine, I haven't needed to. That sounds a bit scary though..... is there anything us sandy bridge owners CAN do without it affecting something else on our rigs :shadedshu

 

[PaulieG]

Has anyone experienced this HDD performance crap? HD tune gives me the same results with and without CStates.

I think this matters little considering that most of us are only gonna run 50x for benchmarking. Real world HDD performance will not be affected.

 

[LAN_deRf_HA]

Many disable cstates though for their 24/7 settings.

http://hardforum.com/showthread.php?t=1578110

 

[cadaveca]

Many disable cstates though for their 24/7 settings.

http://hardforum.com/showthread.php?t=1578110

Lemmings. That is all.




Bloody cpus can do 5ghz without having to turn a single "powersaving" feature off. I dunno why anyone would turn them off, unless they really wanted to waste money in power bills, or are crunching 24/7. I fall into neither group, so I've left well enough alone.

That said, I'll have to check this out. Seems to me most likely something specific to certain BIOSes.

 

[LAN_deRf_HA]

As I've said before, you'd turn it off because you can feel the difference. Many things don't trigger turbo, so they perform sluggishly. And the power savings is all of 18watts. Why would I want to step back two platforms in everyday responsiveness for 18 watts?? Pointless to leave speed step on. You feel the difference simply browsing folders and web. Though if you didn't feel the latency increase going from crt to lcd you may not be bothered by it.

 

[LagunaX]

Quote:
Originally Posted by Undead46 View Post
I set the RAM back to default and I'm getting crashes that aren't resulting in a BSOD which makes no sense to me. Sounds like more of a short tbh.

And the memory is fine, I ran memtest86 with it OC'ed to the max.
And I used this review for reference: http://www.xtremesystems.org/forums/showthread.php?t=266839

I have some of the best RAM to OC with, so I see no issue with it running 2133 at loose timings.
It's still CAS 7 too! LoL

That actually is probably why I'm crashing... Must have a wire touching a no-no! Dam shorts! :/
dpn't forget they should work @ 9-11-9-27 @ 2133 1.5v

Hey you guys are referencing my mini-review!

I'm running 7-10-8-27 1T @ 1.6v 2133.
You can also do 9-10-8-27 1T @ 1.5v 2133.

No problems running 4.8ghz @ 2133 - feels a lot snappier than ddr3 1600 even at CL6.

The AIDA64 read/write/copy is decently better at 2133 also, but not significantly from CL9 to CL7.

Thanks for looking at my mini-review

 

[PaulieG]

Hey you guys are referencing my mini-review!

I'm running 7-10-8-27 1T @ 1.6v 2133.
You can also do 9-10-8-27 1T @ 1.5v 2133.

No problems running 4.8ghz @ 2133 - feels a lot snappier than ddr3 1600 even at CL6.

The AIDA64 read/write/copy is decently better at 2133 also, but not significantly from CL9 to CL7.

Thanks for looking at my mini-review

Link seems to be broken. What's sticks are you running?

 

[LagunaX]

Sorry it didn't go thru with cut and paste - couldn't figure out the multiquote thing.
Anyways, here:
http://www.xtremesystems.org/forums/showthread.php?t=266839

 

[Undead46]

I found out that my shut downs were caused by the VRM.
So I'm using 450 VRM and then up'ing the VCore from there till stable.

Anyone know what I should be running my VRM at?

 

[cadaveca]

As I've said before, you'd turn it off because you can feel the difference. Many things don't trigger turbo, so they perform sluggishly. And the power savings is all of 18watts. Why would I want to step back two platforms in everyday responsiveness for 18 watts?? Pointless to leave speed step on. You feel the difference simply browsing folders and web. Though if you didn't feel the latency increase going from crt to lcd you may not be bothered by it.

You've been spoilt by SandyBridge's awesome clocking skills.


Sluggish.

 

[johnnyfiive]

Like I said, I set RAM back to stock, so I see no reason why it's crashing, even at the voltages it's set to.
I even went down to 4.6GHz @ 1.38Vcore, 1.9V PPL
I ran 4.7 @ 1.37Vcore, 1.8V PPL, & 2133MHz RAM last night for 5 hours then hit a BSOD. :/

The only explanation is it's shorting out, because the computer just powers off, no BSOD or errors, or Over Voltage error on POST.

But I'll have to reorganize wires later when I get home, at work..

I think your PSU is the source of the problem.

I concur. If your machine randomly shuts off, its a clear sign of it being a power related issue. It could be the PSU, the VRM's showing signs of not liking the stress, etc. But it definitely sounds like a PSU issue.

 

[Undead46]

Well I'm sitting at 4.2GHz and I have my VCore set to Auto, and it's hitting 1.41V atm, and I haven't hard crashed yet.

So I would assume it's not PSU related?

Because what's so different from 4.2GHz @ 1.41V than 4.7GHz @ 1.38V...
I would expect it to crash even faster if it was PSU related, since I'd be sending in more voltage.

 

[cadaveca]

Well I'm sitting at 4.2GHz and I have my VCore set to Auto, and it's hitting 1.41V atm, and I haven't hard crashed yet.

So I would assume it's not PSU related?

Because what's so different from 4.2GHz @ 1.41V than 4.7GHz @ 1.38V...
I would expect it to crash even faster if it was PSU related, since I'd be sending in more voltage.

yeah, I said either PSU or board power...you changed phases' frequency. Case closed.

 

[Undead46]

yeah, I said either PSU or board power...you changed phases' frequency. Case closed.

Now I'm at 4.7GHz 1.375VCore (Jumps up to 1.39 max, 1.38 min).
Passed 5 test on IntelBurn Test.

Very weird that I'm not crashing anymore?..

I kept VRM at Auto before and it would hard crash, it's still set to Auto now.

------------

Question, do you suggest having CPU Current Capability kept at 100%, or up to 110%? 130%?

 

[cadaveca]

Now I'm at 4.7GHz 1.375VCore (Jumps up to 1.39 max, 1.38 min).
Passed 5 test on IntelBurn Test.

Very weird that I'm not crashing anymore?..

I kept VRM at Auto before and it would hard crash, it's still set to Auto now.

------------

Question, do you suggest having CPU Current Capability kept at 100%, or up to 110%? 130%?

I run 165%. you said you changed setting, then you set it back to auto? maybe is still running setting you chose earlier. Very rarely see hard shutdown without errors unless cpu hits thermal limit, or power delivery is inadequate. you didn't cross a wall magically..a setting did it.