Maximus V Extreme + 3770K - overclocking past 4.6GHz stability problem

[feniks]

hello!

I am totally new to Maximus V BIOS and still learning it. Board is great and actually I'm impressed how well ASUS made it! it was long time no see with ASUS and I'm glad I gave it a shot again finally 😄

so far I updated BIOS to 704 and all drivers to latest versions (win7 x64 sp1 here), all installed correctly and works nicely! 🙂

One issue though (my fault for sure). I was wondering if anybody could give me a hand with MVE BIOS settings for stabilizing my 3770K OC at 4.7-4.9GHz ... I know the CPU is not a problem, because it used to run those clocks stable on a different board with minimal changes in BIOS.

I tried replicating the same voltage (vcore + PLL + vccio) settings on MVE BIOS and it all works up to 4.6GHz (even with PLL override disabled), rock solid stable.

However when I try running 4.7 or 4.8GHz and enabled Internal PLL override, I just can't get it fully stable under load. Tried nearly all PLL voltage settings between 1.55V and 1.85V and no dice. I am using Intel Burn Test 2.54 for stress testing, usually "Standard" 10 rounds for quick stability testing of CPU and it crashes almost always after a few rounds.

Here are my settings (3770K @ 4.7GHz for example):
multi 47
CPU spread spectrum disabled (default enabled)
BCLK 100.0MHz (default)
vcore 1.225v (used to be stable on a different board with 100% LLC), went as high as 1.250V and no luck still
CPU PLL enabled (default was auto)
PLL 1.85V (that was the setting making it nicely stable with lower vcore on a different board)
CPU LLC Extrmee (100%)
VCCIO 1.25V (auto was around 1.10-1.15V)
CPU VRM 500KHz (default 300KHz)

For time being I am running Extreme LLC settings (100% vdroop control) as I had no time in playing around with offsets yet (I will). I also adjusted Digi+ settings to Extreme levels and VRM to highest frequencies, so there is no things coming into play ... again, no luck.

any ideas what I am missing here? why does it seem like it needs MUCH more vcore than actually it needs?

Thanks for input!

[XIRO]

I bought a ASUS MAXIMUS EXTREME V, an Intel Core i7-3770K and memory modules Corsair Vengeance DDR3 - 16GB - (4x4GB) - 2133 [CMZ16GX3M4A2133C11B]. The problem is that the system does not start, and the Q-LED shows the code "55" whenever I tried all combinations of the four modules in the memory slots, but there is no way to start, does not even start BIOS. The q-code 55 means "memory not installed", but I tried all options, 4 GB, 8, 12, 16, DIMM A_1 / A_2 / B_1 / B_2 and nothing, always the same. I wonder if anyone has any idea why I did not detect the memory modules, even when installed. SYSTEM: Corsair H100 - 2x GIGABYTE GTX 460 SOC 1 GDDR5 - 2 x COOLER MASTER 600W. Please ask for help, I invested a lot of money and I can not make it work. Sorry for my English.

[apocalypzez]

8 Pack wrote:
The current "best Batch number" as found by guys binning them on HWbot and several pro clockers I know are Costa Week 18 as reported by Feniks and Week 29 or Malay Week 20. (Its actually 18C that is the top but B are good too)

My week 18 does 5.0ghz 4c8t on 1.22-1.24v on air and my 29 is even lower volts. The 29 is a tested 6.9ghz chip on LN2.

do you mean Malay week 20 or Costa Week 20?? if malay then i got a friend who is using (@ stock) this. maybe swap mine with him!!

[apocalypzez]

8 Pack wrote:
The current "best Batch number" as found by guys binning them on HWbot and several pro clockers I know are Costa Week 18 as reported by Feniks and Week 29 or Malay Week 20. (Its actually 18C that is the top but B are good too)

My week 18 does 5.0ghz 4c8t on 1.22-1.24v on air and my 29 is even lower volts. The 29 is a tested 6.9ghz chip on LN2.

Thx to you 8 Pack! I got my CPU swapped with batch 'week 20 Malay' and OC like crazy!!!! 1.295v (actual 1.288) allowed a win boot with a 4.8GHz- first ever!!! Although it bsod after 1 min of P95 a couple of vcore bump should get me going...hell, I might even shoot for 4.9!!!!

Thx for sharing the info mate!!!

[8_Pack]

Yeah I am lucky I have two of those the first one I stumbled upon and the second I paid alot for. I also have a 3570 with an IMC that can do 3165mhz+.

The 3570 takes 1.375v for 5ghz but that memory controller totally kicks ass.

[feniks]

8 Pack wrote:
Yeah I am lucky I have two of those the first one I stumbled upon and the second I paid alot for. I also have a 3570 with an IMC that can do 3165mhz+.

The 3570 takes 1.375v for 5ghz but that memory controller totally kicks ass.

I am jealous ... 😉 ... I never bought any retail Intel CPU which was a golden chip ... hopefully I will one day hit the jackpot 😄
is that vcore of 1.375v @ 5GHz at Ultra High LLC or Extreme (it overshoots voltage by around 0.02-0.03v under load on this board) ?

I have just checked my Event logs in Windows and I will have to revise my 4.7 & 4.8 overclocks ... WHEA warnings under load ... more vcore needed 😞

Currently working on improving my cooling system further to better contain the under load temps ... need more fans (currently both rads run pull config) ... and need to get a 24V controller for my D5 Strong pump finally ... otherwise 4.9GHz is out of reach at safe thermal levels ...

[YJK]

@feniks.... yeah dude its hard to find which cherry will be golden 🙂 ....by the way i dont believe on prime 95 .. in real world applications processor hardly gets that much heat and stress ... Ivy is a beast in real world applications not for overclocking .... sandy bridge was perfect platform for overclocking .. but now i bought 2666mhz rams of Dom Platinum which i cant run on Sandy Bridge .... so i will stick with ivy bridge 😄

[feniks]

yeah, tell me about getting golden chips ... heh, I'm not into binning either, no money for that ... will live with what I have 😉

I liked my 2600K very much (not a golden by any means either), could bench 5GHz at some insane vcore hehe, but temperatures were easy to handle even with a simple XSPC cooling kit (a single RX240 + 750 pump/res combo with Raystorm block was great). On the other hand SNB chip running 5GHz has comparable performance with IVB chip running 4.8GHz, so go figure where the average wall is ...

... however I felt my mem sticks were limited by Sandy Bridge mem controller, could do the controller spec max of 2133MHz with 4 sticks (and even at 1T command rate) but it was borderline under sustained load and not good for 24/7, was getting a BSOD usually within 4 days of running non-stop and gaming a few hrs a day ...

Now I run the same sticks with either 2x4GB config at 2400Mhz fully stable or 4x4GB at 2200Mhz daily 24/7 again fully stable, can't complain 🙂
I have an evil plan of trying to overclock them even higher if the sticks chips allow, perhaps 2x4GB @ 2600 or 4x4 @ 2400, that would be cool he he 😄 ... Note - my stick are XMP (1 pair) rated at 2000MHz.

I guess I just hold a grudge towards Intel for making that damn TIM under IHS design on K model ... seems I have a second chip which calls for less vcore than former one, but instead it produces even higher temps under load ... my damn luck is always like that.

Ivy Bridge is awesome when paired with fast memory and PCIe3.0 card(s) 😄 it's a beast, can't beat it for the price and seems ideal for gaming and daily use purpose! 🙂

[apocalypzez]

Batch 3226B912 looks like the worse! It can only do 4.4 with 1.295V at Ultra High LLC!!

Here's a link:
@ Stock Load:
http://imageshack.us/photo/my-images/21/10minstockloadh100.png

@ 4.4GHz Load:
http://imageshack.us/photo/my-images/402/220min4400stable.png

Damn!! I think my very first one was 3218C if I can recall correctly, have to check when I get back home ! If that's the case i will feel stabbing myself, coz that was the chip I tried to do IHS treatment!!!!!!

[feniks]

OK, restabilized my 4.7GHz OC as a new daily by adding only +0.05v on manual vcore (final is 1.2800v with Ultra High LLC) to get rid off the WHEA warnings, it passed 20 rounds of IBT in Maximum Mode, max temps with current cooling 91C on hottest core (78C on coldest one). to me it's rock solid stable and good for 24/7 (that's how I run my systems). PLL was enabled and left on auto (1.8v)
I am yet about to try reaching the same actual idle/load vcore numbers using offset vcore in near future...

however I have slight trouble with 4.8GHz and it seems that first it requires a PLL bump (so far 1.85v seems to solve the stability trouble) and it actually required 1.335V on vcore (again UH LLC) which brings temps to slightly higher level, no good for daily running with my current cooling capacity. There was no WHEA warnings anymore in 3 rounds of IBT in Max mode, but I have yet to confirm it with 20 rounds ... but that will need to wait until I add more fans to rads and install a power upgrade (24v converter) for my water pump, hopefully that does the trick and perhaps would enable me to play around with 4.9GHz finally 😄

[feniks]

Xiro,

posted a reply in your thread.