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Bridging the Sandy Bridge Gap: i5 2500k@4.5 on a Gigabye Z68X-UD3H-B3

post #1 of 14
Thread Starter 
Well I finally bit the bullet and bought the Gigabyte Z68X-UD3H-B3 board even though I had a partciular Asus model in mind, but so far I'm generally satisfied. After plugging up and turning it on, sure enough, came right on so into the BIOS I went. I'm from the socket 7 multiplier days, so this tiny frequency and giant multiplier kinda scared me. The only thing I did was change the multiplier to 45, save the settings, and ...


Oh, and here are the system specs, had to fit them in somewhere:
Raidmax RX - 630z
Intel i5 2500k
Gigabyte Z68X-UD3H-B3
Patriot Viper II Sector 5 8gb 1666@1887
GeForce 560 Ti
1TB Seagate Hard Drive (internal)

The computer actually posted and went halfway into Windows at 4.5GHz before restarting. This is without nothing in the BIOS being changed except the multiplier. Since that didn't work, I tried 42, which worked.. 43, worked as well, and then 44 did the same thing 45 did (reset while loading Windoows). So, I've been trying 42, 43, and 44 but I've been having problems with all.. 43 seems the most stable, it's just so close to that 45 it makes me want to cry.

No matter what I seem to do, 44 and 45 give me the same problem.. The computer will start up, then it'll reset while attempting to load Windows. I'm 'okay' with 43 despite the fact that the BIOS drops my voltages and speed occasionally and sometimes I'll reset and it'll tell me there's an overclocking error.

Now and then, I'll notice my vCore drop by a huge amount (lke say, 1.25v) from 1.45v while I'm in the BIOS. It seems like if I wait for this moment, then set the multiplier, I have a better chance of a succesfull overclock. I could be doing this all wrong, but this is what I'm going for the 4.3GHz:

CPU Frequency: 43 (x100)
CPU vCore: Voltage: 1.435v
Dyynic vCore Boltage: 0000
QPT/vtt Voltage: 1.050v
System Agent Voltage : 0.920v
Graphics Core: 1.800v
DRAM: 1.50V
DRAM.: .075v
DRAM.: 0.75v
Cha-A Data Vref .75v
Cha-B Dara Vref: .75v

Under my RAM settings, I have the memory at 1887MHz
Internal Graphics Clock: 3000
Performance Enhance: Extreme
DRAM Timing Selectabe: Expert

Channel Interleaving: Enabled
Bank Interleaving: Enabled

I've read a few posts about people using this same style of setup to achieve 45, but it didn't work for me. I dunno if I'm not adding enough voltage, adding too much voltage, or just messing with the wrong settings.

Anyone have any comments or suggestions? They're ll welcome. Oh and one last thing about the board, it does this weird thing where it'll keep rebooting (under certain curcumstance) forcing you to remove the CMOS battery and put it back in. Luckily I've only had to do that once. Now if I can just hit 4.5GHz....
Edited by plunx - 8/14/11 at 10:47am
Rostok
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post #2 of 14
Quote:
Originally Posted by plunx View Post
Performance Enhance: Extreme
Set it to Standard while trying to overclock, when you're stable try to set it to Turbo then Extreme.

Also follow this link to fill in your system specs. And I don't think you have an 1GB hard drive.
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post #3 of 14
Thread Starter 
Set all of my RAM settings and timings to auto/default and it's still doing the same thing, it'll work at 43 but not 44 or 45.
Edited by plunx - 8/14/11 at 10:47am
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post #4 of 14
First, read the link below. There is a ton of info on basic OC settings for the Sandy's

I read as much info as I could before touching mine, I've since got it the the sig rig specs without issues really. Didn't really have to do to much tinkering. I'm going to try and hit 5Ghz Tuesday when I get back from vaca. Anyhow, read the link below, do some research, then try to OC with the info you've gathered.


http://www.overclock.net/intel-cpus/...post-your.html
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post #5 of 14
Thread Starter 
I'm reading that link as we speak, but something I wanted to ask earlier.. I can set my vCore to no matter what, if I go into Prime95, it drops to 1.128v, then usually crashes (no surprise there).

What do you do to set your vCore higher and HAVE IT STAY LIKE THAT?
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post #6 of 14
Thread Starter 
Now I'm really not understanding this and I'm sorta getting frustrated. I set the voltage in the BIOS all the way to 1.5v and CPUz/Prime95 still told me 1.128 the whole time.

What is it that you have to do to get the vCore to raise that high and stay like that? All of the good overclocks I've seen are between 1.2xx and 1.5xx, but I can't even break 1.128v.

Am I missing something here completely?
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post #7 of 14
I share my setting with you.

Load line Calibration: set to level 5
CPU Frequency: 45 (x100)
CPU vCore: Voltage: 1.355v - 1.42v depends on your chip.
QPT/vtt Voltage: 1.120v
System Agent Voltage : 1.050v
CPU PLL: 1.75V

CPU PLL overvoltage: Enabled
CPU Real Time OS: Disabled
CPU turbo: Disabled
all the other features within the cpu tweaking leave it the way it is.
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post #8 of 14
Thread Starter 
Call me completely naive, but where are these found:


CPU PLL overvoltage, Enabled
CPU Real Time OS: Disabled
CPU Turbo: Disabled


???
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post #9 of 14
Quote:
Originally Posted by prtuc2 View Post
I share my setting with you.

Load line Calibration: set to level 5
CPU Frequency: 45 (x100)
CPU vCore: Voltage: 1.355v - 1.42v depends on your chip.
QPT/vtt Voltage: 1.120v
System Agent Voltage : 1.050v
CPU PLL: 1.75V

CPU PLL overvoltage: Enabled
CPU Real Time OS: Disabled
CPU turbo: Disabled
all the other features within the cpu tweaking leave it the way it is.
No no no, do NOT change System agent voltage! Leave it 0.920 or 0.925, whatever it is in BIOS, don't touch it.

PLL overvoltage is *generally* only needed at multis 47x+ , this was true for me, though some report having random multis where they need to DISABLE this option, even at high multis like 50x.

General range for 45x is 1.280 - 1.32, though some need 1.35,,,, 1.42+ is overkill and I feel sorry for anyone that needs that much but yeah don't start that high, try 1.31.

Quote:
Originally Posted by plunx View Post
Call me completely naive, but where are these found:


CPU PLL overvoltage, Enabled
CPU Real Time OS: Disabled
CPU Turbo: Disabled

???
Not familiar with the board but those are probably on the same page as CPU vcore.

CPU Turbo voltage should be enabled.

Also C1E and EIST should be ON.

Better yet dude, instead of asking people here, get the best info from here: Sandy Stable Club
    
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post #10 of 14

Keep it simple watch the video, you should able get it to work. Even though the motherboard is not the same model, but the BIOS layout should be the same regardless.

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