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The ULTIMATE Sandy Bridge OC Guide + P67A-UD7 Performance Review - Page 66

post #651 of 713
Quote:
Originally Posted by Ichirou View Post

Yeah, I've already read his guide at the front page of this thread. I understood a lot of it, and I do have the patience.
I just want to know of a speed I could probably jump straight to, without really worrying about changing any of the voltages or anything like that.
Is 4.3 GHz a good start, if I'm purely changing the multiplier? If that works I'll probably just with it, since 4.3 GHz is actually quite suitable for me.
And I see. Seems like my RAM's pretty much just going to stay as it is. Alright, no problem about that.
However, my G. Skills are quad-channel though? I heard that the GIGABYTE motherboards can support upping it via dual-channel? How do I use that?

You might be able to achieve 4.3 GHz simply by increasing the multiplier. If the Vcore is left on auto, then the motherboard will increase the voltage as needed. This works up to a certain multiplier after which you have to increase the Vcore even more. That's what DVID is for, and it is activated by setting Vcore to "Normal." You then set the DVID offset to give you more (or less) Vcore than what the auto setting gives you.

For higher overclocks, it helps to use a fixed Vcore when testing for stability. After you have settled on a set of settings that you are happy with, then you switch to using the DVID offset to give you the same Vcore under load. It takes a bit of trial and error to find the right offset, but the results are worth it. Using DVID in combination with EIST and C1e allows the CPU to downclock and reduce voltage when the CPU is not under load.

You have 4 sticks of RAM and 4 slots on the motherboard, but Sandy Bridge only has two channels. Each channel is routed to two slots on the motherboard. You will be perfectly fine filling all of the slots. I only brought it up because I have read that overclocking RAM with all slots filled is a little more difficult. There is a small performance increase going from 1333 to 1600, but that is mostly in programs where the CPU needs fast access to RAM (i.e. folding@home). There is little benefit beyond 1600 since SB processors only have up to four cores anyway.
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post #652 of 713
Quote:
Originally Posted by valvehead View Post

You might be able to achieve 4.3 GHz simply by increasing the multiplier. If the Vcore is left on auto, then the motherboard will increase the voltage as needed. This works up to a certain multiplier after which you have to increase the Vcore even more. That's what DVID is for, and it is activated by setting Vcore to "Normal." You then set the DVID offset to give you more (or less) Vcore than what the auto setting gives you.
For higher overclocks, it helps to use a fixed Vcore when testing for stability. After you have settled on a set of settings that you are happy with, then you switch to using the DVID offset to give you the same Vcore under load. It takes a bit of trial and error to find the right offset, but the results are worth it. Using DVID in combination with EIST and C1e allows the CPU to downclock and reduce voltage when the CPU is not under load.
You have 4 sticks of RAM and 4 slots on the motherboard, but Sandy Bridge only has two channels. Each channel is routed to two slots on the motherboard. You will be perfectly fine filling all of the slots. I only brought it up because I have read that overclocking RAM with all slots filled is a little more difficult. There is a small performance increase going from 1333 to 1600, but that is mostly in programs where the CPU needs fast access to RAM (i.e. folding@home). There is little benefit beyond 1600 since SB processors only have up to four cores anyway.

So if I'm staying with 4.3 GHz, do I need to touch things like DVID or anything like that? Or at 4.3 GHz, the auto voltage is fine as it is?
post #653 of 713
Quote:
Originally Posted by Ichirou View Post

So if I'm staying with 4.3 GHz, do I need to touch things like DVID or anything like that? Or at 4.3 GHz, the auto voltage is fine as it is?

You will have to try it and see. Every CPU is different.
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post #654 of 713
Quote:
Originally Posted by valvehead View Post

You will have to try it and see. Every CPU is different.

Mine is the same as your Silent Screamer II's i7-2600K, except just at stock, and mine is a D2 (not sure about yours).

I use liquid cooling, which should make a bit of a difference. But yeah, I'll test it out and see how it goes out. Thanks a bunch.
post #655 of 713
Just got my UD7. im playing with overclock around 5.0. I keep getting 124 bsod with c1e disabled. With c1e enabled I have no bsod. What is going on here. I have qpi 1.22v because of 16gb x4 4gb dimms at 2133mhz.
Current settings are
1. llc level 6, vcore 1.43v, Multiplier x50, qpi 1.22v, c1e enabled = stable
2. llc level 6, vcore 1.43v, Multiplier x50, qpi 1.22v, c1e disabled = 124 bsod

even with more vcore up tp 1.47v with c1e disabled i bsod with 124 error. Do I need more vtt voltage because of sli and 16gb x4 4gb dimms at 2133mhz it is already at 1.22v ?
 
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post #656 of 713
Thread Starter 
You can just leave C1E enabled, or you can mess with LLC. Try to flash your BIOS, what BIOS are you on?
    
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post #657 of 713
I'm on F9.
I'm wondering why would c1e stablize the OC ? This is opposite of what I seen in the past. What LLC direction should I go towards level 1 or higher levels (right now im on level 6) ?
Does SLI have anything to do with vtt voltage or is it only for ram.
Edited by UNOE - 12/11/11 at 12:07pm
 
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post #658 of 713
hmmm. bump

At this stage I'm at 4.9ghz with llc level 6, vcore 1.435v, Multiplier x49, qpi 1.22v, c1e disabled. Seemed to just need more voltage to get stable without c1e.

I'm still wondering if llc when I get past 5.0ghz should be doing higher llc levels or lower llc levels. And also does sli effect the need for more vtt voltage ?

I had 1.2v on vtt/qpi and my 3dmark scores where low and my GPU overclock was unstable. With 1.22v I get better 3dmark score.
 
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post #659 of 713
Thread Starter 
Sli shouldn't need more voltage.

but LLC will drop more with heavier load, so yea you can use higher level. But yea maybe you need more qpi/vtt even though i don't see how it would help..
    
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post #660 of 713
Thanks, So I can do level 7, level 8 even with high voltage (1.5v) or 5.2ghz.
 
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(16 items)
 
CPUMotherboardGraphicsGraphics
i7 3930K 4.8Ghz offset ASUS X79 Rampage IV Extreme GTX 780 with EK waterblock GTX 780 with EK waterblock 
GraphicsRAMHard DriveHard Drive
GTX 780 with EK waterblock  Samsung 16GB (4x4gb) 2400Mhz 10-12-12-31-1t @ 1... 256GB Samsung 950 Pro 256GB Samsung 840 Pro 
CoolingCoolingOSMonitor
RX360, EX360, EX360, and 480 Rad's XSPC Raystorm CPU Block Dual boot (other unnamed OS) and Win8 Pro QNIX QX2710 27" 2560x1440 @ 112hz 
KeyboardPowerCase
Corsair K90 Corsair AX1200 Corsair 700D Modded w/ External Radiators 
CPUMotherboardGraphicsRAM
Intel i5 3570K GA-Z77X-UD3H 4x R9 290's 8GB 1600Mhz 
Hard DriveOSPowerCase
1TB Hard Drive Win8 Corsair Dual PSU - AX1200 and HX650 Open Case 
Other
Thee 16x Risers and One 1x Riser 
CPUMotherboardGraphicsRAM
i7 3930K 5Ghz Bench ASUS X79 Rampage IV Extreme 3x AMD 7970's w/ EK water blocks Samsung 16GB (4x4gb) 2400Mhz 10-12-12-31-1t @ 1... 
Hard DriveCoolingCoolingMonitor
128GB Samsung 830  RX360, RX240, EX360 XSPC Raystorm CPU Block QNIX QX2710 27" 2560x1440 @ 114hz 
KeyboardPowerCase
Corsair K90 Corsair AX760i Corsair 700D Modded w/ External Radiators 
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