Post your LOW VOLTAGE Sandy Bridge overclocks! (4.2 @ 1.21V here)

[996GT2]

Here's a little change of pace. Instead of feeding ridiculous voltages through your SB chip to get 5+ GHz, let's see what kinda of overclocks you guys have gotten with a low voltage

When reporting the voltage, don't use CPU-Z since it reports inaccurate voltages for many P67 boards. Use the voltage that is set in BIOS or the voltage reported by your board's tuning utility (i.e. Gigabyte Easytune).

Here's mine: 4.2 GHz @ 1.212V (1.24v in BIOS), 20 passes Linpack stable using all RAM. Load temps never go over 53C For some reason, Core #1 runs about 5C hotter than the other 3 cores even after re-seating the heatink and doing the 3-strip method of applying TIM to a HDT cooler, but oh well.

 

[Dice144]

Could you tell me what idle watts you are getting with that low volts? And load? I am on the fence about going SB over my X6 1090. Mine sucks 85 watts plus when at stock and over 120 idle when OC (at 4.00 Ghz atm).

 

[996GT2]

Could you tell me what idle watts you are getting with that low volts? And load? I am on the fence about going SB over my X6 1090. Mine sucks 85 watts plus when at stock and over 120 idle when OC (at 4.00 Ghz atm).

HWMonitor says CPU draws about 5-6W idle and about 84W during Linpack. However, I'm not sure how accurate the measurement from HWMonitor is.

 

[Bryf50]

Voltage is 1.208 at load. Its 1.25 in the bios. Its been stable through 20 runs of LinX.

 

[BTRY B 529th FA BN]

How is the IPC on SB vs an i7 920 or same speed vs same speed?

 

[mclaren777]

I like the purpose of this thread!

I plan to eventually OC to 4.2GHz so I'm curious to see what voltage people are using.

 

[moonbogg]

I'm at 4.3 using default offset voltage. Under load it pegs around 1.26-1.27v and max temp under prime 95 loading hits 59-60c. I like offset voltage because the chip voltage drops to .9 to 1.0v while idle. I love it.
I did hit 4.5 easily but the voltage needed was around 1.3 and I didn't like that. I want something that I can use without worrying about stability degradation and im comfy enough with 1.26-1.27.
Actually, its so damn fast anyways, maybe i'll back it down to 4.2 get get even less voltage.

 

[pm]

Similar to Moonbogg, I'm at 4.3 using the default offset voltage in the BIOS - I never set a voltage, I let Asus do it. LLC is on - I think - in offset mode. And similar to him, vcore edges up to 1.26V under load and max temp is around 59-60C under both IBT and Prime95. Haven't tried Linx yet. Not sure how stable it really is at 4.3GHz at 1.25V but it was certainly easy. Just slide the ratio bar up and hit "apply".

Core i7 2600K, Asus P8P67, 8GB (2x4GB) Gkill Ripjaw DDR3-1600, Cooler Master Hyper 512 heatsink/fan, Antec Earthwatts Green 380W power supply
all voltages at default, all power-saving settings on, BIOS settings all at default except 2-3 that let you adjust ratios in the OS

 

[djshortsleeve]

Here's a little change of pace. Instead of feeding ridiculous voltages through your SB chip to get 5+ GHz, let's see what kinda of overclocks you guys have gotten with a low voltage

When reporting the voltage, don't use CPU-Z since it reports inaccurate voltages for many P67 boards. Use the voltage that is set in BIOS or the voltage reported by your board's tuning utility (i.e. Gigabyte Easytune).

Here's mine: 4.2 GHz @ 1.212V (1.24v in BIOS), 20 passes Linpack stable using all RAM. Load temps never go over 53C For some reason, Core #1 runs about 5C hotter than the other 3 cores even after re-seating the heatink and doing the 3-strip method of applying TIM to a HDT cooler, but oh well.

Can you post what settings you played with in the BIOS to achieve? Great thread...

 

[devilchrist]

on autoset with my MSI P67-ud4 I get 4.2 and see my voltage spike to 1.35 on coretemp. CPUz says no more than 1.25

 

[Lagittaja]

Quite an old thread but w/e

With my 2500K I can run 4.5 with 1.272v
4.0 goes with 1.152 but haven't yet tried how low I can go.
I have a Gene-Z mobo from Asus

Sent from my HTC Desire using Tapatalk

 

[grkM3]

Quite an old thread but w/e

With my 2500K I can run 4.5 with 1.272v
4.0 goes with 1.152 but haven't yet tried how low I can go.
I have a Gene-Z mobo from Asus

Sent from my HTC Desire using Tapatalk

is that intel burn test with avx enabled stable?

 

[Lagittaja]

Yeah, I've done couple of runs with it every now and then for a quick test but I mainly use prime..
The 4.5Ghz @ 1.272v is 13hrs Prime95 custom blend 6500Mb memory load stable.

Haven't yet tested the 4Ghz setup much..
Prime95 custom blend with 1792k FFT using 4096mb memory load and it was all fine.
Going to see if I could go even lower.
I'll do a proper 12hr+ run of prime95 blend@6Gb memory load after I've found the lowest vcore for 4Ghz.

Would LOVE to see 1.1v @ 4Ghz lol but I don't see that happening
I'll guess=1.12 or 1.13 could be the lowest but I could be wrong.

 

[86waterpumper]

I left my 2500k and asrock pro-3m @ stock voltage settings. At 4.2ghz running intel burn test cpuz shows 1.288 volts under load, and coretemp shows 1.3611? I don't put alot of stock in coretemp though since it doesn't even show my cpu stepping down to 1600 properly. It just always shows it at 3300, while cpuz shows the true idle mhz.

 

[Lagittaja]

don't look at core temp. it doesn't work.
use cpu-z

 

[Idontcare]

I left my 2500k and asrock pro-3m @ stock voltage settings. At 4.2ghz running intel burn test cpuz shows 1.288 volts under load, and coretemp shows 1.3611? I don't put alot of stock in coretemp though since it doesn't even show my cpu stepping down to 1600 properly. It just always shows it at 3300, while cpuz shows the true idle mhz.

CoreTemp, and RealTemp, are showing you the VID - this is the pre-programmed register value stored in your CPU which your CPU is telling the BIOS it needs to apply as the Vcore.

CPUz tells you what the BIOS actually thinks it is applying to the CPU - which will be different from VID because of Vdroop, Vdrop, and LLC reasons.