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***The Official Core i7 Overclocking Thread***

twitch said:
I can run constant folding (SMP) and vantage @ 4GHz at 1.25V cpu in bios..

So I think what I will aim for next is 3.8 at the lowest voltage as like you said the last 200 takes just that little more..
Click to expand...

Twitch,

Sounds good. At 3.8, under burntest which is the hottest stress test I have found, my temps never exceeded mid/high 70's. Prime was low 70's. The 8 thread scientific code I have been running for days on end with all 4 cores at 90-100% never sees temps above 68. This is all on air, near silent, with hyperthreading. These i7's are so fast the extra 200 mhz isn't really worth it. Unless you want bragging rights I guess :p
 
sampo said:
Twitch,

Sounds good. At 3.8, under burntest which is the hottest stress test I have found, my temps never exceeded mid/high 70's. Prime was low 70's. The 8 thread scientific code I have been running for days on end with all 4 cores at 90-100% never sees temps above 68. This is all on air, near silent, with hyperthreading. These i7's are so fast the extra 200 mhz isn't really worth it. Unless you want bragging rights I guess :p
Click to expand...


Hello,

Well installed another 5850 :)
Also replaced the 5 Xilence Red Wing 120mm Quiet Fans for Scythe Gentle Typhoon 120mm fans.
Changed the H50 from sucking air in to blowing out of the case in a push pull with 2 of the above..
And what a difference..

Now running 181 x 21 @ 1.235V cpu and qpi/vtt in bios.

All seems good at the moment.
I might even try a 24hr session of prime ;)

3.8.png
 
well im a noob when it comes to overlocking I7 due to the fact that its my first intel i had so could any 1 tell me how to over clock my i7 from stock to 3.8 and which programs would i use to monitor my system and benchmark


My current system thats not watercooled or liquid cool is -
  • Processor: i 7
  • Memory: 6144MB RAM
  • Hard Drive: 2 x 500 GB and 2 x 1T
  • Video Card: XFX ATI Radeon HD 5870
  • Sound Card: Creative SB X-fi Gamers Edition
  • Operating System: Windows 7 Ultimate 64-bit, and Windows XP Professional 32bit
  • Motherboard: AsusTek P6T SE
  • Power suppily 700w


thanks
 
Have had one pass through here that did 4.14Ghz w H/T at 1.275v under a TRUE with sycthe juno 1600rpms and P6T SE with 6GB dominator ram. Really wished i could keep it but client was in next day for it and didn't have any 920s only i5s:( Its virtually silent at 3.6Ghz 1.1v (less in windows) as the fans are detuned to 5v, barely does 65C under intel burn and about 56C in prime. Was topping out at around 83C at 4.1Ghz with fans at full 1600rpm
 
Justintime said:
Have had one pass through here that did 4.14Ghz w H/T at 1.275v under a TRUE with sycthe juno 1600rpms and P6T SE with 6GB dominator ram. Really wished i could keep it but client was in next day for it and didn't have any 920s only i5s:( Its virtually silent at 3.6Ghz 1.1v (less in windows) as the fans are detuned to 5v, barely does 65C under intel burn and about 56C in prime. Was topping out at around 83C at 4.1Ghz with fans at full 1600rpm
Click to expand...

The only reason I asked is because I got a stable 3.9GHz at just under 1.3, turbo mode is still on.. so it's 4.1GHz I just took a screen print, which I will add in a minute, I am just resettings to record the exact settings I put aswell

Also, let me know where to find some good fans.. my case fans seem awful, and the CPU one could do better, I got stock Coolermaster Storm Scout fans, and the Titan Fenrir

CAPTAINBUMFLUFF said:
How much temperature and performance difference does turning hyperthreading off have
Click to expand...

I'm not an expert but it halfs the amount of threads the CPU can do at once, most programs don't support 8.. or even 4, but quite a few games will take advantage of it, and so if you are using it for gaming then I'd leave it on, the temperature and performance drop would most likely be around equal.. but you could probably also lower the voltage, but not too sure..
 
http://aaron146.pwp.blueyonder.co.uk/screen1.jpg

http://aaron146.pwp.blueyonder.co.uk/screen2.jpg

Temperature is the only problem...

BIOS:
Speedstep - Enabled
Hyperthreading - Enabled
Vcore - 1.29375
Vdroop - Disabled (made the voltages go up over 1.4v and the temperature super hot, didn't increase stability noticeable enough because of high temps)
CPU VTT/Uncore - +40mV (I don't know what it actually is, or the default)
PLL - 1.603v (1.8v is default, but people say they get increased stability lowering it, this is the lowest it will go)
DRAM Voltage - 1.61v
IOH - 1.1(default)
Turbo Mode - Enabled
Bclock 195
Memory multipliers are x8 resulting in 1594MHz
System and CPU fans are on smart fan, not full, so the CPU gets hot, then at about 80 degrees it will go really fast

In the picture I used core temp for Intel Burn Test, and then opened Real Temp and Prime95 to show you the difference in highest temperatures and also the CPU voltage in CPU-Z, never goes over 1.29 in CPU-Z, which is the max voltage I set in BIOS

This CPU ran stable at 4GHz on stock CPU voltages under prime for hours, but not Intel Burn Test for 10 minutes

4.2GHz @ turbo mode is stable with just under 1.31v, but I don't want to go that high, also max temperatures go up around 4 degrees

BTW I never overclocked until 3 days ago, took until now to get this stable and I think I'll keep this, even though the temperatures are really hot, it won't get that in any games.. in Crysis warhead it had a max temp of 74

Aegis panel shows all temps 10 degrees lower than the average temperature over all cores, and this is probably why the fan is a little behind.

Will upgrade system fans, maybe CPU fan, maybe CPU cooler in future.. the system fans are weak...

SPECS:

i7 920
Titan Fenrir
Foxconn FlamingBlade GTI
6gb Corsair XMS3 1600MHz
ATi 5850 1gb (powercolor), - also OC'd to 900/1150 stable under 2 stability tests at a time
SB X-Fi Xtreme PCI-E
Coolermaster Storm Scout

Hopefully I didn't forget anything there, but here are my memory settings also.. these were set auto by the system but are lower latency to the ram specs

memory.jpg


Can post 3dmark results if anyone wants?
 
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Bought an i7 D0 retail here a few days ago.

On my H50 however, I get around 40 degrees idle and it shoots up to around 70 on stock settings!

Tried a Zalman Extreme cooler as well and various re-seating but the temps are about the same.

Whats wrong? I'm sad :(
 
xyphox said:
Bought an i7 D0 retail here a few days ago.

On my H50 however, I get around 40 degrees idle and it shoots up to around 70 on stock settings!

Tried a Zalman Extreme cooler as well and various re-seating but the temps are about the same.

Whats wrong? I'm sad :(
Click to expand...

Try turning off vDroop in BIOS and retesting, it is evil for me, and if you check in CPU-Z then you will see the voltage go maybe over 1.4v with vDroop on.. but idle should be around the same with it off, let us know how you get on
 
At least check to see if the voltage is the problem, run a stress test and watch the voltage in CPU-Z, should only take a few seconds, see if it goes above the set voltages

EDIT: Try changing the LLC
 
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Hi guys, I haven't kept up with CPUs since building my current rig about 2 years ago. I am looking to upgrade to a core i7 soon (for my budget the £240 i7 930 seems best choice for cost vs performance.)

I have tried reading through the threads but can't work out what the current best motherboard seems to be to overclock this CPU - I am only looking for the 3.6Ghz not anything really high, and will probably use stock cooling (although the arctic freezer 7 worked well in my current rig...)

Any suggestions regarding a mobo that seems to be reliable for this and overall have good performance for the cost?

Thanks in advance for the help :)
 
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