EP45-UD3P+Q9550 Fine Tuning My OC, Need Some Help

[LiamSR]

Hi all,

My system now 24hr Prime stable. My purpose is to lower my Vcore and keep it stable @ 3.82GHz
Any ideas ?

**MB Intelligent Tweaker(M.I.T.)

Robust Graphics Booster ...............:[Auto]
CPU Clock Ratio .......................:[8]
Fine CPU Clock Ratio...................:[+0.5]
CPU Frequency .........................:3.82GHz (450x8.5)

**Clock Chip Control 

Standard Clock Control
CPU Host Clock Control................: [Enabled] 
CPU Host Frequency (Mhz) .............: [450]
PCI Express Frequency (Mhz) ..........: [100]
C.I.A.2 ..............................: [Disabled]

**Advanced Clock Control [Press Enter]

CPU Clock Drive........................: [800mV]
PCI Express Clock Drive................: [900mV]
CPU Clock Skew (ps)....................: [0ps]
MCH Clock Skew (ps)....................: [0ps] 


**DRAM Performance Control

Performance Enhance....................: [STANDARD]
Extreme Memory Profile (X.M.P.)........: [Disabled]
(G)MCH Frequency Latch.................: [Auto]
System Memory Multiplier ..............: [2.00D]
Memory Frequency (Mhz) .....1066.......: [900]
DRAM Timing Selectable ................: [Manual]

**Standard Timing Control

CAS Latency Time........................: [5]
tRCD ...................................: [5]
tRP'....................................: [5]
tRAS....................................: [15]

**Advanced Timing Control

tRRD...................4....................: [3]
tWTR...................4....................: [3]
tWR....................8....................: [6]
tRFC...................68...................: [52]
tRTP...................4....................: [3]
Command Rate (CMD) ....0....................: [Auto] 


**Channel A

All Auto

**Channel B

All Auto

**Motherboard Voltage Control

CPU
Load-Line Calibration.......................: [Enabled]
CPU Vcore.............1.25000V..............: [1.38125V]  CPU-Z: Idle 1.36v Load 1.344v-1.36v
CPU Terminatio........1.200V................: [1.240V]
CPU PLL...............1.500V................: [1.570V]
CPU Reference.........0.760V................: [Auto]


MCH/ICH
MCH Core..............1.100V...............: [1.200V]
MCH Reference.........0.760V...............: [Auto]
MCH/DRAM Reference....0.900V...............: [Auto]
ICH I/O...............1.500V...............: [1.570V]
ICH Core..............1.100V...............: [1.200V]

DRAM
DRAM Voltage .........1.800V...............: [2.100V]
DRAM Termination .....0.900V...............: [Auto]
Channel A Reference ..0.900V...............: [Auto]
Channel B Reference ..0.900V...............: [Auto]

Advanced Settings
Limit CPUID Max. to 3........................: [Disabled]
No-Execute Memory Protect....................: [Disabled]
CPU Enhanced Halt (C1E)......................: [Disabled]
CPU Thermal Monitor 2(TM2) ..................: [Disabled]
CPU EIST Function............................: [Disabled]
Virtualization Technology....................: [Enabled]

My system

CPU: Q9550 [email protected] 57c@load
CPU Cooling: Scythe Yasya
Memory: G.Skill 2x2GB DDR2-1066 CL5
GPU: Sapphire Radeon 4870 512MB DDR5
MB: Gigabyte GA-EP45-UD3P rev 1.1 Bios ver F10
HDD: Samsung F3 1TB x2+Seagate ST3500320AS 500GB
PSU: SeaSonic M12II-620W Bronze
Case: TT Armor Plus MX
Display: Hanns-G HG281DPB 28"
OS: Windows 7 Ultimate 64bit

[kick]

Re: EP45-UD3P+Q9550 Fine Tuning My OC, Need Some Help

wot can i tell ya.
If your happy with your overclock the cpu v isnt that high now.

My Q8400 is probably providing more performance than your Q9550

http://forums.tweaktown.com/f69/q8400-q8200-overclock-ep-45-ud3-high-fsb-37179/

but for near max performance q9550 check out posts by Conners and his search for 500fsb and beyond like a stable 4.1 Ghz on q9550 on the ud3p.
450 fsb(cpu ref) you should be able to use a multiplier other than 2:00 for your memory,to get max bandwidth/minimum latency.
If you do find conner's posts and get like 480-490 cpu ref you will get higher performance than me I would hope.

[Lsdmeasap]

Re: EP45-UD3P+Q9550 Fine Tuning My OC, Need Some Help

I bit more Vtt might allow you to lower your vcore a notch or three

[LiamSR]

Re: EP45-UD3P+Q9550 Fine Tuning My OC, Need Some Help

wot can i tell ya.
If your happy with your overclock the cpu v isnt that high now.

My Q8400 is probably providing more performance than your Q9550

http://forums.tweaktown.com/f69/q8400-q8200-overclock-ep-45-ud3-high-fsb-37179/

but for near max performance q9550 check out posts by Conners and his search for 500fsb and beyond like a stable 4.1 Ghz on q9550 on the ud3p.
450 fsb(cpu ref) you should be able to use a multiplier other than 2:00 for your memory,to get max bandwidth/minimum latency.
If you do find conner's posts and get like 480-490 cpu ref you will get higher performance than me I would hope.

I can get to 4.25GHz stable, when the ambient temp below 25c, but now it's summer and the ambient temp is above 30c so I prefer keeping my oc below max.

I bit more Vtt might allow you to lower your vcore a notch or three

I'll try it... Thanks

Something weird happed (before I changed the Vtt), I got BSOD on bootup although the oc is 24hr prime stable and the temp is good.

[Lsdmeasap]

Re: EP45-UD3P+Q9550 Fine Tuning My OC, Need Some Help

Have any luck yet?

[LiamSR]

Re: EP45-UD3P+Q9550 Fine Tuning My OC, Need Some Help

Unfortunately not, It seems that my OC isn't stable as I thought, It passes 24hr prime but when I try to watch HD movie my system hangs (works fine without oc).

Any ideas ?

[Lsdmeasap]

Re: EP45-UD3P+Q9550 Fine Tuning My OC, Need Some Help

That could just be caused by a bad GFX Driver, are you using the latest?

Since it is fine at stock that may not be the issue though, you say Prime95 stable but how about other tests such as Memtest86+ or LinX/Intel Burn Test?

Might just need 1.24 or so MCH Core voltage. Can you check with Memset what tRD you are getting using auto, it might be set too low.

Get it here, the setting is called Performance Level in Memset
Tweakers.fr

[LiamSR]

Re: EP45-UD3P+Q9550 Fine Tuning My OC, Need Some Help

I have the latest driver, I tried to reinstall it but no joy.

I did a Memtest check it's all ok. It passes 20 LinX loops without any errors.

Here is the Memset info (tRD set to '9') -



Thanks for the help

Edit:

You were right it is program related, I removed the ATI driver and the Codecs (K-Lite) and now it works ok... I'll try to install ATI driver again to see if that is the cause.