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Overclocking i7920 D0 to 3.5GHz

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June 27, 2011 7:42:49 PM

I've a few questions. I am overclocking to 3.5 here are the settings. Have I set everything right? Should I increase or decrease any of the voltage? Should I Set Load-Line calibration? Should I disable Bi-Directional PROCHOT. Is my QPI link Speed Safe. Is my Uncore Clock Ratio correct at 2 x System Memory Multiplier +1 =13 or am I getting this formula wrong. As far as my memory should I tighten it up and to what? I’m a noob.
Thanks for all your input.
Gigabyte X58A-UD5 rev.1 motherboard - XMS3 — 6GB Triple Channel DDR3 Memory Kit (TR3X6G1333C9) Corsair DDR3 Memory.SPD Latency: 7-7-7-20
Tested Latency: 9-9-9-24
Memory Type: DDR3
Speed Rating: PC3-10600 (1333MHz)Tested Speed: 1333Mhz
6GB XMS Memory kit for triple channel systems, 1333MHz, 9-9-9-24, 1.5V
2 triple channel kits for 12GB total memory.
Advanced CPU Core Features
Intel Turbo Boost Tech. [Disabled]
CPU Cores Enabled [All]
CPU Multi-Threading [Enabled]
CPU Enhanced Halt (C1E) [Disabled]
C3/C6/C7 State Support [Disabled]
CPU Thermal Monitor [Enabled]
CPU EIST Function [Disabled]
Bi-Directional PROCHOT [Enabled]
Advanced Frequency Settings
CPU Clock Ratio [20 X]
CPU Frequency 3.50GHz(175x20)
QPI Clock Ratio [x36]
QPI Link Speed 6.3GHz
Uncore Clock Ratio [x13]
Uncore Frequency 2275MHz
BCLK Frequency(Mhz) [175]
Memory Frequency(Mhz) 1066 1050
PCI Express Frequency(Mhz) [100]
CPU Clock Drive [700mV]
PCI Express Clock Drive [700mV]
CPU Clock Skew [0ps]
IOH Clock Skew [0ps]

Motherboard Voltage Control
Load-Line Calibration [Auto]
CPU Vcore 1.23750V [1.25000V]
Dynamic Vcore (DVID) 0.00000V Auto
QPI/Vtt Voltage[1.195V] 1.175V [1.195V]
CPU PLL 1.800V [Auto]
PCIE 1.500V [Auto]
DRAM Voltage 1.500V [1.500V]
DRAM Termination 0.750V [Auto]

Advanced Memory Settings
System Memory Multiplier (SPD) [6.0]
Memory Frequency(Mhz) 1066 1050
Performance Enhance [Turbo]
Dram Timing Selectable (SPD) [Auto]
Profile DDR Voltage 1.5V
Profile QPI Voltage 1.75V
Channel Interleaving 6 Auto
Rank Interleaving 4 Auto
Timing Settings Timing Control
CAS Latency Time 8 9
tRCD 8 9
tRRD 8 9
tRAS 20 24
a b B Homebuilt system
June 27, 2011 9:00:20 PM

Looks like you have the right idea.

vcore looks a bit low
your ram is 1333Mhz 7-7-7-20? and you have it 1066Mhz 9-9-9-24? You shouldn't have issues running it at it's factory timings.

The best way to test stability is to run prime 95 over night and see if it gives you any errors and adjust from there. Everyone's cpu is different and what works for some might not work for you. It really comes down to trial and error and figuring out what overclock brings about stability.
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June 28, 2011 1:09:07 AM

If your system is unstable the first thing I would decrease is your QPI. I have had a few finicky 920's that setting the QPI back to 4800 allows the chips to bump 400-500 extra MHZ. If heat becomes an issue you can disable hyper threading also.

As a side note the 920 should be able to run at 3.5 all day. I actually run mine at 4.0 on air without any problems, but each system is different.
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June 28, 2011 11:25:07 AM

So adjust the timings from 9-9-9-24 to 7-7-7-20 and leave at 1.5v?
thanks the noob.
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June 28, 2011 2:35:14 PM

How do I decrease the qpi? thanks the noob
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June 28, 2011 2:37:36 PM

Would someone post their settings for 3.8Ghz and 4.0Ghz
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June 29, 2011 12:00:43 AM

The 920 has a 4.8ghz QPI by default yours is running at 6.3ghz. As long as its stable then it shouldn't make a difference, but if you would like more cpu clocks just decrease the multiplier for your QPI from 36 to something that keeps you under under 5.5ghz, then inch up your fsb and test.

All of your dram voltages are fine, but you can increase the multiplier by one of two as that memory is rated at 1333, and you are running it at 1066.

Everyone's settings for their overclocks are different depending on their motherboard manufacturer model revision and bios. Posting my settings would not really help you overclock your system.

Additionally every board and chip react differently, so even with the same part numbers and same CPU stepping, we could get very different results.
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