A bit lost (i7 920)

Ovr

Ovr

Ovr

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Hmmm,

Well not to be one of a million i7 threads but I've lost my mind a little here guys!

Before beginning I'd like to point out that memory is confirmed fine in memtest86 @ all the speeds I've been trying.

Ok, here's the problem!

My i7 D0 default volts is 1.2875 and at 4ghz, I can run it happily with auto settings on all voltages apart from Vcore of 1.3V, QPI at 1.355, and Dram at 1.66V (natch.)

This is with 6gb of Dominator C9, QPI at 32x, Uncore at 16x, and ram at 8x.

However, I get random crashes when opening say, a JPG after a few days uptime - very annoying! OCCT will do a full loop one day, and fail after 10mins on another which made me think voltages.

Hoooook, so I put the CPU Pll to 1.88 as a matter of fact and tried again - same results. Next step, Increase the IOH core to 1.14, still no change...doh!

So in the end I tried these:

Vcore 1.3025 (increased just as a gasp at stability)
QPI 1.355
Pll 1.88
PCIE 1.5
QPI Pll 1.14
IOH Core 1.14
ICH I/O 1.5
ICH Core 1.14

This is all at 190x21 (turbo always on) running on a UD5 Gigabyte board. Can anyone see anything CRAZILY wrong? I mean it's *almost* 100% stable with everything on auto except for QPI, VDIMM and VCORE, surely I'm missing something so rudimentary it's ridiculous? The PSU should be fine too as it's a Corsair TX650.

Apologies if this post is all over the place, using an iPhone isn't the easiest method of typing anything out in this kind of form :D Any help is simply invaluable.

Many thanks,

Matt xoxo
 
Sorry for the bump guys but just left it overnight on small FFTs and it passed, but OCCT Linpack is still failing :( so confused that nothing seems to make it stable :(
 
What Frequency is your RAM?

You need minimum of DDR3-1600

Rules and relations:
BCLK (Base Clock – default 133.33 MHz, range: 100-500)
CPU Frequency = BCLK x CPU Multiplier (CPU Ratio)
DRAM Frequency = BCLK x Memory Multiplier
UCLK Frequency = BCLK x Uncore Multiplier (Options: 1600-5600 MHz)
QPI Frequency = BCLK x QPI Multiplier (Options: 4800/5866/6400 MHz @ BCLK 133 MHz)
Uncore Multiplier (frequency) ≥ 2 x Memory Multiplier (frequency)
Uncore Multiplier (frequency) : QPI Multiplier (frequency) ~ 8 : 9 for best stability
Click to expand...

I would set all yout voltages back to AUTO except the Vcore and QPI voltage.
 
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yarr a higher base clock would mean ram running faster.

I think my ram runs at 1603mhz @ 20x200 (asus board tho)

He states dominator slowest of which i think is 1600
 
found this if it helps:


Gigabyte X58 Overclocking

CPU Clock Ratio [20x]

Advanced CPU Features [Press Enter]:
CPU Clock Ratio [20x]
Intel(R) Turbo Boost Tech [Enabled]
CPU Cores Enabled [All]
CPU Multi Threading [Enabled]
CPU Enhanced Halt (C1E) [Enabled]
C3/C6/C7 State Support [Disabled]
CPU Thermal Monitor [Enabled]
CPU EIST Function [Enabled]
Virtualization Technology [Disabled]
Bi-Directional PROCHOT [Disabled]

Uncore & QPI Features [Press Enter]:
QPI Link Speed [x36]
Uncore Frequency [x16]
Isonchronous Frequency [Enabled]

Advanced Clock Control [Press Enter]:
standard clock control
Base Clock (BCLK) Control [Enabled]
BCLK Frequency (MHz) [200]
PCI Express Frequency (MHz) [AUTO]
C.I.A.2 [Disabled]

advanced clock control
CPU Clock Drive [ 700mV]
PCI Express Clock Drive [ 700mV]
CPU Clock Skew [ 0ps]
IOH Clock Skew [ 0ps]

Performance Enhance [Turbo]
Extreme Memory Profile (X.M.P.) [Disabled]
System Memory Multiplier (SPD) [x8]
DRAM Timing Selectable (sPD) [Manual]

Channel A

CAS Latency Time 8 [9]
tRCD 8 [9]
tRP 8 [9]
tRAS 20 [24]

Channel B

CAS Latency Time 8 [9]
tRCD 8 [9]
tRP 8 [9]
tRAS 20 [24]

Channel C

CAS Latency Time 8 [9]
tRCD 8 [9]
tRP 8 [9]
tRAS 20 [24]

Advanced DRAM Features [Press Enter]:
Performance Enhance [Turbo]
Extreme Memory Profile (X.M.P) [Disabled]
System Memory Multiplier (SPD) [AUTO]
DRAM Timing Selectable (sPD) [Manual]


Advanced Voltage Control [Press Enter]:
Load Line Calibration [Enabled] (Whats peoples views on this?)
CPU Vcore 1.15v [1.28125v]
QPI/VTT Voltage 1.150v [1.280v] (Tried from 1.28v-1.36v with no change in how long it takes to BSOD)
CPU PLL 1.800v [AUTO]

MCH

PCIE 1.500v [AUTO]
QPI PLL 1.100v [AUTO]
IOH Core 1.100v [AUTO]
ICH I/O 1.500v [AUTO]
ICH Core 1.1v [AUTO]

DRAM

DRAM Voltage 1.500v [1.66v]
DRAM Termination 0.750v [AUTO]
Ch-A Data VRef. 0.750v [AUTO]
Ch-B Data VRef. 0.750v [AUTO]
Ch-C Data VRef. 0.750v [AUTO]
Ch-A Address VRef. 0.750v [AUTO]
Ch-B Address VRef. 0.750v [AUTO]
Ch-C Address VRef. 0.750v [AUTO]
 
Hmm ram is 8multi so around~1550, is that a problem? Wouldve thought under clocked wouldve been fine?

Also I notice the 700 skews, currntly on optimised which is iirc 700/800, so these make a huge difference? Don't really understand what they're doing which I'd why I'm slightly weary! Thanks for all the advice though chaps!
 
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Depends what RAM you have. What RAM do you have?

You can easily find the correct memory multiplier based on the maximum speed of the RAM... Lets say your BCLK is 190MHz.. and you have DDR3-1600

max mem speed / BCLK = mem mult
1600 / 190 = 8.4

use the nearest available multiplier available, in this case 8

The uncore multiplier should be 2x memory multiplier so 16 so the UCLK Freq should be 3040MHz.


Oh, you have disabled Turbo Boost becuase this will automatically increase the CPU multiplier.
 
I'd definitely set your PCI-E frequency to 100MHz, leave Load Line Calibration enabled (at least for now anyways), Try setting your vcore just over 1.3v and the QPI/vtt just over 1.3 as well. Also set Performance enhance to Standard. Those are my settings anyways so it might be worth a shot if your chip is similar to mine. My cpu multi is x21 by the way.
 
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