Disadvantage of LLC?

[Yuriman]

Confirming that I'm 24 hours stable at a lower voltage without using the LLC on my Asrock Z77. 1.280v vs 1.248v.

 

[Phynaz]

Boris, did you bother to RTFA? Once you use LLC you have no idea what your load voltage is, short of reading it from the CPU itself with a meter.

Once you enable LLC, the load voltage presented to you in software is wrong (it displays lower than what the true voltage is).

 

[borisvodofsky]

Boris, did you bother to RTFA? Once you use LLC you have no idea what your load voltage is, short of reading it from the CPU itself with a meter.

Once you enable LLC, the load voltage presented to you in software is wrong (it displays lower than what the true voltage is).

NO where in the article does it say this.

You've clearly misinterpreted.😀

 

[Phynaz]

Fine, just look it up. It's a fact.

Please quit spreading this nonsense.

 

[cmdrdredd]

Yea you think you are, but you're not.

Think of vdroop as shocks in your car. It's there to help smooth out the potholes and speed bumps. It doesn't mean you can't drive without shocks, you sure can, but eventually you'll break your car.

Same thing here. Eventually you'll hit a big enough voltage transient to make your system crash. And you'll never reproduce this while stress testing because it happens randomly during idle/load transitions. It's going to be unpredictable, unreproducible, and uncontrollable.

If you like running you're system like that, by all means go ahead. If vdroop wasn't necessary Intel engineers would have already removed it.

How will it crash? Dude I've done everything, gaming, benchmarking, stressing with IBT and Prime and memtest out the wazoo.

Seriously, if it's stable it's stable. There is no mythical "suddenly crashed for no reason" happening.

Especially if you're monitoring WHEA errors like I do and see zero for weeks. Yeah it's stable. Zero crash, zero errors, zero issues with heat. Hence...STABLE SYSTEM! Amazing

How are you gonna tell me that I'm not stable when there's zero issues at all. Yeah that's right, none...nothing.

Here's something else...since the i7 920 came out a friend of mine has had one overclocked with LLC on. That's almost 4 years now with no BSOD, no WHEA errors, no trouble at all.

Yeah LLC will magically crash you. No it won't...

 

[PowerK]

Vdroop is a good thing, IMO. It's part of Intel's design and their specifications.

As for WHEA errors, I've only seen it with Ivy Bridge processors. I've never seen one with Sandy Bridge CPUs. Makes me wonder why Ivy Bridge CPUs are prone to WHEA errors.

 

[StrangerGuy]

Vdroop is a good thing, IMO. It's part of Intel's design and their specifications.

As for WHEA errors, I've only seen it with Ivy Bridge processors. I've never seen one with Sandy Bridge CPUs. Makes me wonder why Ivy Bridge CPUs are prone to WHEA errors.

Yeah if LLC was so good to begin with Intel would have made it part of the specs.

 

[moonbogg]

I recently discovered that I don't need any of that "high performance" current/voltage regulation stuff. I'm now at 4.3ghz with AUTO offset voltage, LLC set to normal (which is off) and all of the other current settings are set to normal or off. I am prime stable 8 hours and could have gone longer i'm sure. Temps are lower and everything is stable. All that stuff does is crank up the heat. Maybe its useful for extreme overclocks but for sane clocks it didn't help me.

 

[poohbear]

can someone explain why you'd want vdroop? under load would'nt you want the vcore to remain consistent? i though vdroop was always bad.

 

[2is]

can someone explain why you'd want vdroop? under load would'nt you want the vcore to remain consistent? i though vdroop was always bad.

Both the pros/cons of vdroop and LLC have been explained earlier in this thread. In pretty good detail too.

 

[rgallant]

anyone seen any facts in this thread.
-how about current systems ib + z77 ? not old tales , on old systems

 

[2is]

How about it?

The relationship between current and voltage behaves the same regardless. Besides, if IB had vastly different power characteristics than SB, they would not both work on the exact same motherboards.

 

[rgallant]

my view is,
ib\z77 needs less current/voltage than sb on the same if not better vrms , plus newer phase designs and controller chips , better bios defaults ,more so on higher quality z77 mobo's.

-so if LLC over shoot is still there it will not be as great as in sb. which LLC has killed how many non abused sb chips ? none that have been posted that I know of.

-my ib\z77 settings use LLC @ 50% + a offset , still tweaking ,

-which is better than the 100% LLC only option I used on the E760\920 @ 4.2 and still going after 3 yrs [deemed safe you would think]-still base on a high end board and a good bios.

 

[Smoblikat]

Hey guys, just found this thread and thought id share my results:

LLC set to 1 (100%) with a fixed voltage of 1.2v I am fully stable at 4.3ghz, ironically with LLC set to 5 (off) and an offset voltage of -.145, the lowest I can go, I am still stable at 4.3, average voltage is 1.12. If my board allowed it I guarentee I could go lower with the offset, but that would be weird since my chip idles at .830v 😛

EDIT - Just upped the clocks to 4.4 and im still stable 😛. 4.4ghz @ 1.12v. Ima shoot for 4.5 now, keep in mind this is with FOUR sticks of DDR3 2133

 

[2is]

my view is,
ib\z77 needs less current/voltage than sb on the same if not better vrms , plus newer phase designs and controller chips , better bios defaults ,more so on higher quality z77 mobo's.

-so if LLC over shoot is still there it will not be as great as in sb. which LLC has killed how many non abused sb chips ? none that have been posted that I know of.

-my ib\z77 settings use LLC @ 50% + a offset , still tweaking ,

-which is better than the 100% LLC only option I used on the E760\920 @ 4.2 and still going after 3 yrs [deemed safe you would think]-still base on a high end board and a good bios.

Well.... That's pretty much all guess work, optimistic guess work at that. What isn't guess work is IB with its smaller manufacturing process is more sensitive to voltage than SB is. So a voltage spike, even if it MIGHT be lower, may not necessarily be any less harmful. Another thing that isn't guess work is that vdroop is part of Intel's spec and LLC isnt. Then again, neither is overclocking, so it depends on just how far out of spec you want to push the CPU.

Bottom line is that it's your chip, your board and you can do with it as you please. For me, the extra couple hundred MHz isn't worth the added heat and stress on my CPU or board as well as increasing the potential for instability. Perhaps as my processor ages, I'll crank things up a bit, particularly if I need to extend it's useful life just a little while longer before a new CPU is released. That's what I did with my Q6600 when BF3 was released so I could hold out until IB was available. As it stands now, the cons out weigh the pros, which honestly seems to be nothing more than an ever so slightly larger epeen.

 

[moonbogg]

Marketing and excessive heat generation. Thats what its good for.