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Have I hit a memory performance wall? 3.85GHz OC

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  • Memory
  • Performance
  • Overclocking
Last response: in Overclocking
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April 5, 2010 6:19:24 PM

I'm new to OC'ing, but have read everything I can get my hands on to learn. I have successfully OC'd my 2.8GHz Intel E6300 Wolfdale on a Gigabyte GA-EP45-UD3P motherboard to be stable at 3.85GHz as far as my Prime95 results. I don't do games, but I do render video via Adobe AfterEffects. This took rendering a 5 minute motion graphics video project from 7 min. 39 sec. to under 5 minutes. Everything I've read, this processor seems to be pretty consistently OC'd to +4GHz. I think I've hit a wall with my potentually concervative/poor choice of lower performance memory (G.SKILL 4GB (2 x 2GB) 240-Pin DDR2 SDRAM DDR2 800 (PC2 6400). That allowed me to stable OC to 3.83GHz. I have since replaced my RAM with Patriot Viper PC2-8500 1066MHz 4GB(2 x 2GB) Kit (5-5-5-15) PVS24G8500ELKR2. I don't know the nuances to tweak the bios settings to realize optimum performance that would yield OC performance past 3.85GHz. Suggestions would be greatly appreciated. I'm kind of on a quest to prove to myself that I can successfully OC this chip/config. to +4GHz.

Here's my current config. followed by my current bios settings:

Intel Pentium E6300 Wolfdale 2.8GHz LGA 775 65W Dual-Core Processor Model BX80571E6300

GIGABYTE GA-EP45-UD3P LGA 775 Intel P45 ATX Intel Motherboard

(current RAM) Patriot Viper PC2-8500 1066MHz 4GB(2 x 2GB) Kit (5-5-5-15) PVS24G8500ELKR2

(replaced this with the Patriot Viper above) G.SKILL 4GB (2 x 2GB) 240-Pin DDR2 SDRAM DDR2 800 (PC2 6400) Dual Channel Kit Desktop Memory Model F2-6400CL5D-4GBPQ

ECS N9500GT-512MUL-F GeForce 9500 GT 512MB 128-bit DDR3 PCI Express 2.0 x16 HDCP Ready SLI Support Video Card

Cooler Master Silent Pro M1000 Modular 1000-Watt ATX Power Supply

ARCTIC COOLING Freezer 7 Pro Rev.2 92mm Fluid Dynamic CPU Cooler

LITE-ON CD/DVD Burner - Bulk Black SATA Model iHAS124-04

Western Digital Caviar Black WD7501AALS 750GB 7200 RPM SATA 3.0Gb/s 3.5" Hard Drive

COOLER MASTER HAF 932 RC-932-KKN1-GP Black Steel ATX Full Tower Computer Case

Microsoft Windows 7 Professional 64-bit

****BIOS Settings*****

Under Advanced BIOS Features
CPU Enhanced Halt (C1E) [Disabled]
C2/C2E State Support [Disabled]
CPU EIST Function [Disabled


Under MB Intelligent Tweaker (M.I.T)

Robust Graphics Booster [Auto]
CPU Clock Ratio [10 X]
Fine CPU Clock Ratio [+0.5]
CPU Frequency 3.85GHz ( 367x10.5)

********** Clock Chip Control **********
>>>>> Standard Clock Control

CPU Host Clock Control [Enabled]
CPU Host Frequency(MHz) [367]
PCI Express Frequency(MHz) [100]
C.I.A 2 [Disabled]

>>>>> Advanced Clock Control

Advanced Clock Control [Press Enter]
(note: no parameters have been adjusted here, but these are the current settings under [Press Enter])
CPU Clock Drive [800mV]
PCI Express Clock Drive [900mV]
CPU Clock Skew [ 0ps]
MCH Clock Skew [ 0ps]

********** DRAM Performance Control **********

Performance Enhance [Standard]
Extreme Memory Profile(X.M.P.) [Auto]
(G)MCH Frequency Latch [333MHz]
System Memory Multiplier (SPD) [2.00B]
Memory Frequency(MHz) 1066 734
DRAM Timing Selectable (SPD) [Manual]
>>>>> Standard Timing Control
CAS Latency Time 5 [4]
tRCD 5 [4]
tRP 5 [4]
tRAS 15 [14]

>>>>> Advanced Timing Control
Advanced Timing Control [Press Enter]
(note: no parameters have been adjusted here, but these are the current settings under [Press Enter])

tRRD 4 [Auto]
tWTR 4 [Auto]
tWR 8 [Auto]
tRFC 68 [Auto]
tRTP 4 [Auto]
Command Rate(CMD) 0 [2]

>>>>> Channel A
Channel A Timing Settings [Press Enter]
Channel A Driving Settings [Press Enter]

>>>>> Channel B
Channel B Timing Settings [Press Enter]
Channel B Driving Settings [Press Enter]

********** Mother Board Votlage Control **********
Voltage Types Normal Current
----------------------------------------------------------
>>> CPU
Load-Line Calibration [Enabled]
CPU Vcore 1.28750V [1.39375V]
CPU Termination 1.200V [Auto]
CPU PLL 1.500V [Auto]
CPU Reference 0.760V [Auto]
>>> MCH/ICH
MCH Core 1.100V [1.200V]
MCH Reference 1.760V [Auto]
MCH/DRAM Reference 0.900V [Auto]
ICH I/O 1.500V [Auto]
ICH Core 1.100V [Auto]
>>> DRAM
DRAM Voltage 1.800V [2.100V]
DRAM Termination 0.900V [Auto]
Channel A Reference 0.900V [Auto]
Channel B Reference 0.900V [Auto]

More about : hit memory performance wall 85ghz

a b K Overclocking
April 5, 2010 7:21:54 PM

As long as you keep a 1:1 memory ratio, the 800 ram would have been fine with a 10.5 multiplier. The memory isn't the problem. You need to tweek other voltages.
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April 5, 2010 7:24:57 PM

RJR said:
As long as you keep a 1:1 memory ratio, the 800 ram would have been fine with a 10.5 multiplier. The memory isn't the problem. You need to tweek other voltages.


Great, I can always return the memory. What voltages do I need to tweek? Like I said, I'm new, and thought that I had the CPU Vcore as high as I can safely set according to the Intel spec.
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a b K Overclocking
April 5, 2010 7:33:30 PM

You are going for a rather high OC on your chip, it may be one or a combination of a few you need to set.

You should look at MCH, CPU Term and GTL ref voltages to begin with, then take most of the other voltages OFF auto.

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April 5, 2010 7:59:45 PM

RJR said:
You are going for a rather high OC on your chip, it may be one or a combination of a few you need to set.

You should look at MCH, CPU Term and GTL ref voltages to begin with, then take most of the other voltages OFF auto.

Great, but I unfortunately have not idea what to set the other voltages to. I've looked everywhere and I cannot find any forums on this chip and/or board combination that talk about what to set these voltages to. How to I methodically go about tweeking these? All at the same time? In isolation? How do I know how high I can safely go? I don't want to fry my board or chip obviously. Sorry if I'm seeming dense, but I'm searching for specific handholding I guess.
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April 6, 2010 4:18:48 AM

RJR said:
The first place to start is here:

http://download.intel.com/design/processor/datashts/313...

That way you know all the recommended and max voltages and temperatures.

OMG thank you. I've looked all over Intel's site trying to find this, but for whatever cockpit error of a reason, I couldn't find it. Thank you so much. I'll be back for more beatings soon ; - D
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a b } Memory
a c 197 K Overclocking
April 6, 2010 11:18:11 AM

There is also a good chance that you have reached the limits of your particular CPU.
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