Help Overclocking

[bash25]

Dear All,

I am in the need of expert help, as I am overclocking my current pc speced below;

Intel Core i7 920 D0 Stepping (SLBEJ) @ 3.80 GHz
Gigabyte EX58-UD5 Intel X58 Motherboard (Bios F12)
Patriot Viper 6GB DDR3 PC3-12800C8 1600MHz DDR3 Bundle
Coolmaster Cosmos RC1000 case - all fans replaced with Scythe Kaze-Jyun (2000 rpm)
Corsair H50
Asus 6870
OCZ Vertex 2E 60GB
500GB Western Digital Hard Drive
1TB Samsung F1 Hard Drive

I have used the guide http://forums.tweaktown.com/gigabyte/39748-settings-3-8ghz-overclock-i7-920-gigabyte-ex58-ud5-latest-f12-bios.html

However I changed of the settings in order to get my pc stable. But it crashes after 5 mins of prime95.

Room temp: 22.8C
CPU temps @ idle: 36 - 40C
Load temps (after 3 mins are 64 - 72C

I would be grateful if some experts can help go through my settings in order to get it stable. After this I would like to increase my overclock to 4.0 GHz


MB Intelligent Tweaker M.I.T) Settings 1

Advanced CPU Features
CPU Ratio 19x
CPU Frequency
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 Disabled
Virtualization Technology Enabled

UnCore & QPI Features
QPI Clock Ratio x36
QPI Link Speed
Uncore Clock Ratio x17
Uncore Frequency
Isochronous Support Enabled

Advanced Clock Control
Base Clock (BCLK) Control Enabled
BCLK Frequency (MHz) 200
PCI Frequency (MHz) 100
C.I.A.2 Disabled
CPU Clock Drive 700mV
PCI Express Clock Drive 700mV
CPU Clock skew 0ps
IOH Clock skew 0ps

Advanced DRAM Features
Performance Enchance Standard
Extreme Memory Profile (X.M.P) Disabled
System Memory Multiplier (SPD) 8.0
Memory Frequnecy (Mhz)
DRAM Timing Selectable (SPD) Auto
Profile DDR Voltage
Profile QPI Voltage
Channel Interleaving
Rank Interleaving

Channel A, B, C
Timing Setting
Channel A, B, C Standard Timing Control
CAS Latency Time 8
tRCD 8
tRP 8
tRAS 24
Command Rate CMD 1

Advanced Voltage Control
Load-Line Calibration Enabled
CPU Vcore 1.200v
QPI/VTT Voltage 1.355v
CPU PLL 1.880v
PCIE Auto
QPI PLL Auto
IOH Core 1.240v
DRAM Voltage 1.660v
ICH I/O Auto
ICH Core Auto
DRAM Termination Auto
Ch-A Data Ref Auto
Ch-B Data Ref Auto
Ch-C Data Ref Auto
Ch-A Adress Ref Auto
Ch-B Adress Ref Auto
Ch-C Adress Ref Auto

I would be very grateful for any advise given.

Bashy.

 

[bluesouljah]

need to up the vcore thats far too low. I use about 1.4 for 4.2.

Cheers,

Blue

 

[twist3d0n3]

qpi is too high i'd say, i used 1.2v for 4GHz.

vcore, i needed about 1.25v for 4GHz, a lot more for 4.2.

also, i've found on gigabyte boards reducing pll actually improves things, and as such i keep mine at 1.7 (you'll need to experiment here).

qpi pll set to about 1.16/1.18, shouldn't need more, unless you start going for 4.2/4.4

ioh you might as well leave on 1.1 - i found i needed a bit more due to having multiple gpu's.

same goes for ich (if you're loading all of the sata ports with overclocking, up it a tad).

stick pci-e to 101/103, see if that helps with stability also.

 

[bash25]

Thank you bluesouljah and twist3d0n3.

Sorry for the late update. I have now managed to get my overclock stable @ 3.8GHz after running Prime95 for 15 hours and my max temps were 72 - 78C, by changing the below changes;

PCI Frequency (MHz) 101
CPU Vcore 1.225v
CPU PLL 1.700v
QPI PLL 1.16v

Now I would be grateful you can help me to reach 4.0GHz ?

Thanks in advanced.

Bashy.

 

[twist3d0n3]

as said, i needed about 1.25v on the cpu to get it stable at 4, with 1.2v qpi.

have a fiddle with the cpu pll and see if taking it even lower makes it stable with the same voltages as you have now.

it's all about trial and error, so if you up one thing, test it. if it fails, drop that voltage down, and try upping a different one, test again. eventually you'll find either a nudge for one voltage (or a couple) will be all you need for stability.

edit: also, you're getting to the higher end of what i consider operational temps, so ideally you don't want to go over 80 (it's not really an issue, just what i like to keep them under).

make sure also you disable c1e, eist, prochot, and any other thermal settings the cpu has, this will help with stability also.

edit 2: just noticed you're running 200 bclk with 19 multi; try this instead: 21x191 (you need turbo on for that multi)