**Official** Core i7 860/870 overclocking thread

[OC Nub]

Passed blend at 4100mhz.

[PolRoger]

Testing blend tonight. It needed a small bump in vcore from the short linx run I did last night, failed blend at 1.29vcore after about 20 minutes or so. I tested this ram using the same timings at higher speeds with my 860 so I am pretty sure it was just lack of vcore that caused it to fail. Will let this go overnight to see if it is stable enough to move on.

... Batch#?

[OC Nub]

I have no idea why there is a "T" at the end, I have never seen that before. Will try and test some more blend tonight.

[OC Nub]

I got this and the 860 from the same Micro Center. The 860 wasn't as good, required much more vcore and vtt. Have saved all my retail boxes over the past few years and hadn't seen this T before now. I am happy so far with the chip, will test some more when I get time.

[OC Nub]

Thanks, I'm testing 4200mhz blend now. It is warm in the room, the wife is killing my overclocking though with the heat turned way up.

[ovan febriawan]

can only SuperPi 32M test and PCMark Vantage cz the temp so hot

...

[zsamz_]

can only SuperPi 32M test and PCMark Vantage cz the temp so hot...

because your heatsink suks
i never even hit above 85c even with linx

[ovan febriawan]

@zsamz_ : I'm not using HSF, I use TT Prowater 880i
any recomendation for may cooling?

[DragoonXX]

some would probably say upgrading to real watercooling...what kind of budget do you have?

[ovan febriawan]

some would probably say upgrading to real watercooling...what kind of budget do you have?

at this time, I only have $150 for upgrade

[zsamz_]

@zsamz_ : I'm not using HSF, I use TT Prowater 880i
any recomendation for may cooling?

get a coolmaster 212 28 shipped with an xtra fan for push pull 10$=40$
http://www.newegg.com/Product/Produc...olmaster%20212

or get a megahalems 60$ + extra fan=70$
http://www.newegg.com/Product/Produc...Tpk=megahalems
you be good for 4.2

[overclocking101]

ive got one! 860 Batch number L932B709 pack date 10/15/09 how do you find the VID on these chips? have not oc'd at all yet actually havent even fired the m3f and 860 patriot sector 5 2000MHZ and 5770 up yet! just got them just now like 3 mins ago!

[overclocking101]

well here it is guys! right out of the box stock cooler idle temps about 39-42c load about 66c or so not bad right? is this a decent OC?? this is my first time overclocking anything without a FSB since core2 came out lol

[kuchaiii]

Hello guys, I'm newbie here. Glad to join this thread...



Currently limited @ 4.0 ghz, with BIOS Setting as below :
AI Overclock Tuner : Manual
CPU Ratio Setting : 20
C1E Support : Disabled
Intel Speedstep Tech : Disabled
Intel C-STATE Tech : Disabled
BCLK Frequency : 200
PCIE Frequency : 100
DRAM Frequency : DDR3-1600 Mhz
QPI Frequency : 7202

Load Line Calibration : Enabled
CPU Voltage : 1.3500
CPU PLL Voltage : 1.80200
IMC Voltage : 1.29850
PCH Voltage : 1.06000
DRAM Voltage : 1.65625

DRAM Timing Control
CAS Latency : 7
RAS to CAS Delay : 7
RAS PRE Time : 7
RAS ACT Time : 24

Onboard Devices Configuration : Disabled

It's hard pushing beyond 4.0 ghz becaus of the temperature is already too HOT. 1 minute Linpack the temp has reached 82 C. So I shut it down. But with above setting I manage to pass 3DMark 2006, Vantage and SuperPI 32 mb.

[OC Nub]

Your voltages are good for 4ghz, but I would keep pll at 1.80v and dram at 1.65v. What cpu cooler are you using?

[OC Nub]

I rebuilt my loop today, and replaced the gtz water block with and xt. Just got it running after testing for leaks. Running some blend to see how it does.

[kuchaiii]

Your voltages are good for 4ghz, but I would keep pll at 1.80v and dram at 1.65v. What cpu cooler are you using?

It's 1.80v and 1.65v. I use TRUE Black. In my place the ambient temperature is very hot, about 28 -30 C.

[irev210]

Corsair H50 cooler
P7P55D-E Deluxe
G.Skill Ripjaws 2000MHz ram

Results: (after ~8 hours of LinX)
172MHz BCLK
21x mult
3.62GHz CPU speed
2064MHz Memory speed

1.25Vcore
1.35VTT
1.6Vdimm

While nothing extraordinary, this system is dead silent and extremely stable.

[PolRoger]

Corsair H50 cooler
P7P55D-E Deluxe
G.Skill Ripjaws 2000MHz ram

Results: (after ~8 hours of LinX)
172MHz BCLK
21x mult
3.62GHz CPU speed
2064MHz Memory speed

1.25Vcore
1.35VTT
1.6Vdimm

While nothing extraordinary, this system is dead silent and extremely stable.

Can your chip run that overclock with a little more vcore and less vtt... ~1.25v?

[-n7-]

My i5 750 was so easy to OC compared to my new i7 860.

Temps are way higher at similar vcore due to HT, & once again, what's stable in P95 isn't remotely stable in LinX.

For both my i5 750 & the i7 860 in here now, i find P95 useless when using LinX, as P95 (even w/ custom RAM set to 6+ GB) says all is stable & LinX fail in less than 10 passes

I cannot even get 4 GHz LinX stable outta this i7 860 so far .

P95 says all is great @ 4 GHz, but LinX laughs @ me & says nope, even when i upped vcore.

[-n7-]

Well, after much fighting, it's obvious i cannot do 4 GHz LinX stable due as i'd need more vcore than my temps allow for.

Kinda disappointing, as i could do 4.15 GHz LinX stable w/ my i5 750, but i suppose HT is nice to have...

For the i5 750, i could do ~ 200 BCLK @ 1.23vtt.
For the i7 860, it needs at least 1.29vtt for the same, or BSODs during LinX...

Here is as far as i can get with vcore/vtt as low as possible:


Synthetics

[zsamz_]

mannn -n7- them 860s are gettin worse

[RPGWiZaRD]

Not yet, my i7-860 is a very early batch and doesn't do any well.

4GHz (191x21) HT on:

Vcore: 1.4375v (BIOS setting) / 1.408v CPU-Z
VTT: 1.32v

4.1GHz (195x21) HT off:

Vcore: 1.4375v (BIOS setting) / 1.408v CPU-Z
VTT: 1.36v

Temps are 69~72C HT off and 74~76C HT on during LinX. However during LinX CPU-Z shows only 1.36v load. LLC is set to "standard" taking into account Intel LLC standard specs, using level 1 and 2 which are supposed to increase vcore a bit further at load didn't do any good for me but it's prolly the VTT volts that would need increase instead if overclocking a bit further, honestly I have no idea why this cpu needs this much VTT even pre 200 bclck but it's not cuz of the mem, whatever mem multi/setting I use I still need the same VTT for cpu to be stable.

[zsamz_]

Not yet, my i7-860 is a very early batch and doesn't do any well.

4GHz (191x21) HT on:

Vcore: 1.4375v (BIOS setting) / 1.408v CPU-Z
VTT: 1.32v

4.1GHz (195x21) HT off:

Vcore: 1.4375v (BIOS setting) / 1.408v CPU-Z
VTT: 1.36v

Temps are 69~72C HT off and 74~76C HT on during LinX. However during LinX CPU-Z shows only 1.36v load. LLC is set to "standard" taking into account Intel LLC standard specs, using level 1 and 2 which are supposed to increase vcore a bit further at load didn't do any good for me but it's prolly the VTT volts that would need increase instead if overclocking a bit further, honestly I have no idea why this cpu needs this much VTT even pre 200 bclck but it's not cuz of the mem, whatever mem multi/setting I use I still need the same VTT for cpu to be stable.

wow your is bad i got mine early too
i can do 4.2 ht 1.4v

[OC Nub]

@-n7-: Are you running the latest 64bit version of p95? On every board I have, from the 775 quads to these 1156 quads it takes less voltage to pass linx than blend, have seen others post the same thing. Normally if it runs 20 passes of linx max mem it will require a small bump in vcore to pass blend without exception on about 6 different quads and 4 different boards.