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I finally achieved 4GHz [1100T] but I cheated. - Page 2

post #11 of 14
Quote:
Originally Posted by hansbehrends View Post
With 6 cores, even at 4200 Mhz system boots fine and seems stable, until I run Prime95 or OCCT

this goes for anything above around 3.7

still stumped
My overclocks become more and more stable as i increase CPU/NB voltage, if i have it at 1.35V, 2.8Ghz NB, i can achieve 4ghz with a lower CPU voltage. buy about .05V
post #12 of 14
Quote:
Originally Posted by odin2free View Post
OP
It might also be because prime sometimes ramps up volts when it seems fit...
i was watching my cpuid and prime95 for about an hour...
watched the volts spike from 1.35..to 1.42...
i was only clocking minimal
It might be prime being lame and crashin it


THAT List is exactly what you need print it put it over your monitor and know what code it is to fix it helps so much
That's the motherboards load line calibration kicking in, that's the board and nothing to do with prime.

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post #13 of 14
Thread Starter 
I NOTICED
that CPU-Z will show CPU as being "140W" when I have ALL SIX CORES overclocked to settings that are prone to crash/freeze PC.

I.E. HT reference 260 * 15.5 (4030 MHz) [ANY VOLTAGE]
regardless of CPU-NB speed: 2000 MHz or 2600 MHz [2600 @ 1.25V - 1.3V)

As the CPU nears 4000, CPU-Z shows the CPU as a 140W CPU
that's when I'm in trouble zone

now with 3 cores CPU-Z shows a 125W CPU @ 4200

perhaps a different board (ASUS Crosshair IV, ASRock 890 Extreme, whatever)
might allow me a stable overclock near 4000 with six cores. OK bash away at the MSI board I got.
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red bastard
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WD Velociraptor 300GB [soon in 4X RAID] ASUS SATA multi-recorder Windows 7 64-bit ViewSonic VA702w 27" 1080p 
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post #14 of 14
Thread Starter 
As the title says.
3 cores go to 4200 (and possibly higher - I might get a 1000 MHz overclock)
4 cores will go 4004 (I tried 4125 and that would not go)
6 cores will not go beyond ~ 3700. At any voltage. Regardless of temps.

For the 3 and 4 core OC's, 1.48V was the lowest I could go without errors from IntelBurnTest (20 runs)

After CPU overclock confirmed stable in IntelBurnTest,
I add a juicy CPU-NB overclock, as well as a memory overclock.

Final (at least for now):

HT reference speed (286) * 14 = 4004 on 4 cores @ 1.48V (min), up to 1.5V under load.
CPU-NB 2860 MHz @ 1.28V
G.Skill RipjawsX CL9 memory 8GB kit (2 x 4GB) @ 1907 MHz, 9-9-9-24-33-1T
HT Link speed is something like 1957 MHz.

Still open to suggestions ... I never messed with PCI-E reference speed (100MHz) or voltages other than CPU VDD and CPU-NB VDD.

Great fun
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WD Velociraptor 300GB [soon in 4X RAID] ASUS SATA multi-recorder Windows 7 64-bit ViewSonic VA702w 27" 1080p 
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red bastard
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CPUMotherboardGraphicsRAM
1100T Stepping 0/Rev PH-E0 MSI 890FXA-GD65 Rev3 DUAL BartsXT @ 900/1050 [RIPJAWS X] 7-7-7-20-1T 
Hard DriveOptical DriveOSMonitor
WD Velociraptor 300GB [soon in 4X RAID] ASUS SATA multi-recorder Windows 7 64-bit ViewSonic VA702w 27" 1080p 
KeyboardPowerCaseMouse
Sidewinder X4 Corsair TX750 V2 Rosewill ARMOR red bastard Sidewinder X5 
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