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Need help with OC of 3770k on Asus P8Z77-V PRO/Thunderbolt Mobo

post #1 of 8
Thread Starter 
Sorry if this isn't the right place for this post. I'm new to overclocking and have been looking around these forums and the web for some clarity on what I'm running into on my OC without much luck.

In short, I can't seem to set the CPU Ratio for any core above 43 in the BIOS (setting it to any value above 43 reverts it to 43, values below 43 are fine). Additionally, when doing stress tests with Prime95 and monitoring with SpeedFan and CPU-Z, CPU-Z shows a multiplier line of "x 41.0 (16 - 43)" and a core speed of 4.1 GHz rather than the 43 multiplier and 4.3 GHz I am expecting. My immediate questions are, why can't I go above 43 for my CPU ratio and why, when my CPU Ratio is set to 43 in the BIOS, is CPU-Z reporting my computer topping out at 4.1 GHz?

As far as my BIOS settings go, I've flashed to the latest version (2003).
I'm using X.M.P.'s defaults for my RAM settings (not ready to think about OC'ing RAM yet)
My BCLK/PEG frequency is 100.0 (everything I've read is telling me not to mess with the clock)
I've disabled all my C reports/packages except C1E
I have my CPU Voltage set to 1.2 (am planning to mess with offset mode once I get the OC figured out without it)
Turbo Mode and Enhanced SpeedStep Technology are enabled.

CPU Load-line Calibration is set to High
CPU Voltage Frequency is Manual and set to 300
CPU Power Phase Control is set to Extreme
CPU Power Duty Control is T. Probe
CPU Current Capability is 140%
CPU Power Thermal Control is 130
Everything else is pretty much stock I think

I figured I'd come here before doing a CMOS reset. If anyone has any suggestions/ideas/recommendations or if you see anything that doesn't make sense in my settings, please let me know. I'm confused and trying to learn here and anything's helpful. Thanks.
post #2 of 8
You might find some more apropriate help/information here: http://www.overclock.net/t/1291703/ivy-bridge-overclocking-guide-asus-motherboards
Gaming Rig
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i7 4930k Asus Rampage IV Black Edition Asus Strix GTX 970 Asus Strix GTX 970 
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Gaming Rig
(19 items)
 
  
CPUMotherboardGraphicsGraphics
i7 4930k Asus Rampage IV Black Edition Asus Strix GTX 970 Asus Strix GTX 970 
RAMHard DriveHard DriveOptical Drive
Corsair Vengeance Low Profile 16GB (4x4GB) DDR3... Western Digital 2TB Caviar Black (WD2003FZEX) Samsung 840 Pro SSD 128GB LG BH16NS40.AUAU10B 16x 
CoolingCoolingCoolingCooling
Phanteks PH-TC14PE_BK Phanteks PH-F140HP Cooler Master MegaFlow 200 LED Cooler Master MegaFlow 200 LED 
OSMonitorKeyboardPower
Windows 7 Professional (Retail/Full) Dell UltraSharp U2713HM Corsair K95 Corsair AX860 
CaseMouseMouse Pad
Cooler Master HAF X Corsair M65 (Black) Corsair Vengeance MM600 Dual Sided Gaming Mouse... 
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post #3 of 8
Update to the latest BIOS, 1908 I believe. There is an error in the BIOS that makes it so your settings revert after you change toe clocks. I have not had any problems since the latest BIOS update. Good luck! I'm running 4.5 with 1.3v on mine, can't fault the board for my bad CPU. rolleyes.gif
post #4 of 8
Thread Starter 
Thanks, that's actually the primary thread on which I'm basing my settings and part of the reason I'm confused/asking on these forums. There are a few settings differences between my build and his, namely CPU Load-Line Calibration (High vs. Ultra High) and CPU Voltage Frequency (350 vs. 300). I had tried using exactly those settings earlier today and I still ran into the same issue, capped at 4.1 GHz and a BIOS CPU-Ratio of 43. Is it possible that my BIOS is screwy? or is it likely that I'm missing a setting somewhere? Everything I've read indicates I should be able to clock this board/CPU combo to 4.4 or 4.5 GHz without altering much more than CPU Ratio and vcore.

As for BIOS version I'm running the latest version I see listed on Asus's website (version 2003)

It's not that I'm having stability issues when I go above 4.1 GHz, and I don't think it's that the BIOS ignores my settings changes (I can go below 43 just fine and it works, plus it seems to save everything I do when I tell it I want it saved), it's mostly that the BIOS doesn't let me change the CPU Ratio to anything higher than 43 in the first place, saved or otherwise. If I enter a number in the CPU Ratio box, say 44, 50, etc...., it fills in the corresponding box with 43. If I enter a number like 42 or 35, it stays as 42 or 35, no problems. Haha, if I only wanted to underclock the board I'd probably be fine....
Edited by Bozerg - 7/2/13 at 9:42pm
post #5 of 8
I was stuck at 4.3 too. The problem is the BIOS, it has been well documented. It affects most Asus Z77 boards. I followed all the settings in the same guide, my only problem was raising the multiplier past 4.3. Flashing the same BIOS or clearing CMOS will fix it for a while, before it would get screwy again. The latest update quietly fixed it, even though ASUS never even admitted a problem existed in the first place! thumb.gif

It only lets you set the multi up to 4 bins above the stock turbo boost speed(3.9GHz), if that makes sense.
Edited by markallen1988 - 7/2/13 at 9:50pm
post #6 of 8
Thread Starter 
Thanks, that's really good to know. I've been looking all day and hadn't found anything, so I figured it was just me (I don't usually suck at Google and strictly adhering to directions has been an issue in the past, but I digress).

As far as solutions go: I flashed my BIOS to the latest version earlier today (before posting here) but didn't reset the CMOS. Will resetting the CMOS do the trick, or do I need to do some combination of CMOS reset and BIOS flash?

When you say it only lets you set the multi up to 400 Hz above the stock turbo, you mean the screwy BIOS only lets you do that right? Because that's what I'm hoping to fix.
post #7 of 8
Quote:
Originally Posted by Bozerg View Post

Thanks, that's really good to know. I've been looking all day and hadn't found anything, so I figured it was just me (I don't usually suck at Google and strictly adhering to directions has been an issue in the past, but I digress).

As far as solutions go: I flashed my BIOS to the latest version earlier today (before posting here) but didn't reset the CMOS. Will resetting the CMOS do the trick, or do I need to do some combination of CMOS reset and BIOS flash?

When you say it only lets you set the multi up to 400 Hz above the stock turbo, you mean the screwy BIOS only lets you do that right? Because that's what I'm hoping to fix.
you're welcome. It is hard to find info on this mobo, it is kinda uncommon. The problem affects most ASUS mobos. EITHER clearing CMOS or flashing the current (older) BIOS will temporarily fix it, but that latest BIOS you flashed should do the trick. And yeah, I was talking about the screwy BIOS not taking the clock increases past 4.3.
post #8 of 8
Thread Starter 
Well, I'm stumped. I reset CMOS using jumpers. Still couldn't go above 43.
So I reflashed to BIOS version 2003 (same thing I had been on). Still couldn't go above 43.
So I reset CMOS again using jumpers and pulled the battery for good measure. Still can't go above 43.
Any ideas as to what I'm doing wrong? When I reset CMOS all the settings are at the default (not where they had been). Same thing for when I flash the BIOS.
Is there a stock setting somewhere in the BIOS that might hard cap me at 43 should I fail to change it? If this is an issue with Asus's BIOS (which I suspect it is), is there a way around it that I haven't tried? Thanks again for your help.
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