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Voltages Seem Too High

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thedahn

Registered
Joined
May 10, 2010
Location
Evansville, IN
I've been fiddling around with overclocking for a couple weeks now, and I decided to run through the tutorial on this site again. I successfully overclocked to close to 4.0GHz (190x21).

My vCore voltage for 190x21 is 1.425, and the VTT is 1.3625. Looking at others' systems with similar overclocks, they are all running much lower voltages. One example I came across on the net shows someone running vCore 1.375 and VTT 1.2375. I understand that every chip is different, but something seems very wrong here.

As far as temps, my 190x21 is running upper 70s, sometimes getting up to 82. When I tried 4.2 (200x21), I put my vCore up to 1.5125 and it still is not running stable! The temps got up to 93 before I cut it off.

Please help!

Mobo: ASUS P7P55D PRO LGA 1156 Intel P55 ATX Intel
CPU: Intel Core i5-750 Lynnfield 2.66GHz LGA 1156
RAM: CORSAIR XMS3 4GB (2 x 2GB) DDR3 1600 (9-9-9-24)
VGA: EVGA GeForce GTX 260 Core 216 Superclocked
HDs: Western Digital Caviar Black 500GB 7200 RPM SATA (x2 RAID1)
Cooling: XIGMATEK HDT-S1283 with Arctic Silver 5
 
See if these settings work for you at 4.2GHz...
Code:
[B][U]A1 Overclock Tuner[/U][/B]
A1 Overclock Tuner Mode......:[Manual]
Cpu Ratio Setting............:21
Intel(R) SpeedStep(TM) Tech..: [Disabled]
Intel(R) TurboMode Tech......: [N/A]
Xtreme Phase Full Power Mode.: [Enabled]
BCLK Frequency...............:200
PCIE Frequency...............:102
DRAM Frequency...............: 1600
QPI Frequency................: [Auto]
Channel Interleave...........:6
Rank Interleave..............:4

[b][u]DRAM Timing Control Sub Menu[/u][/b]
[u]1st Information[/u]
CAS#  Latency (tCL )...............:9
RAS# to CAS# Delay (tRCD ).........:9
RAS# PRE Tine (tRP)................:9
RAS# ACT Tine (tRAS)...............:24
RAS# to RAS# Delay (tRRD)..........: 4
REF Cycle Time (tRFC)..............:60
WRITE Recovery Tine (tWR)..........:8
READ to PRE Time (tRTP)............:4
FOUR ACT WIN Tine (tFAW)...........:[auto]25
[u]2nd Information[/u]
Timing Mode (CMDR).................:1N
Round Trip Latency on CHA (RTL)....: [Auto]55
Round Trip Latency on CHB (RTL)....:[Auto]58
[u]3rd Information[/u]
WRITE To READ Delay(DD)(tddWrTrd)..:[Auto]8
WRITE To READ Delay(DR)(tdrWrTrd)..:[Auto]8
WRITE To READ Delay(SR)(tsrWrTrd)..:[Auto]18
READ To WRITE Delay(DD)(tddRdTwr)..:[Auto]8
READ To WRITE Delay(DR)(tdrRdTwr)..:[Auto]8
READ To WRITE Delay(SR)(tsrRdTwr)..:[Auto]8
READ To READ Delay(DD)(tddRdtRd)...:[Auto]7
READ To READ Delay(DR)(tdrRdtRd)...:[Auto]6
READ To READ Delay(SR)(tsrRdtRd)...:[Auto]4
WRITE To WRITE Delay(DD)(tddWrTWr).:[Auto]7
WRiTE To WRITE Delay(DR)(tdrWrTWr).:[Auto]7
WRITE To WRITE Delay(SR)(tsrWrTWr).:[Auto]4

[B][U]Dram Driving & SlewRate Control Sub Menu[/U][/B]
CMD Driving Up Ctrl................:13
CMD Driving Down Ctrl..............:13
DQ Driving Up Ctrl.................:13
DQ Driving Down Ctrl...............:13

CLK SlewRate Ctrl A................:13
CLK SlewRate Ctrl B................:13
CMD SlewRate Ctrl .................:13
CTRL SlewRate Ctrl.................: 13
DQ SlewRate Ctrl ..................:13

[B][U]Dram Skew Control Sub Menu[/U][/B]
Address Floating Control ..........:[Auto]
DRAM CLK Delay Patch Location .....:[Auto]

DRAM ODTO Delay on Channel A ......:[Auto]
DRAM CLKO Delay on Channel A.......:[Auto]
DRAM CMDA Delay on Channel A ......:[Auto]
DRAM WDQS0 Delay on Channel A......:[Auto]
DRAM TXDQO Delay on Channel A .....:[Auto]
DRAM RXDQSO Delay on Channel A ....:[Auto]

DRAM ODTO Delay on Channel B ......:[Auto]
DRAM CLKO Delay on Channel B.......:[Auto]
DRAM CMDA Delay on Channel B ......:[Auto]
DRAM WDQS0 Delay on Channel B......:[Auto]
DRAM TXDQO Delay on Channel B .....:[Auto]
DRAM RXDQSO Delay on Channel B ....:[Auto]

[b][U]A1 Overclock Tuner Continued[/U][/b]
CPU Differential Amplitude.........:1000mv
CPU Clock Skew.....................: 1300ps
CPU Voltage Mode...................: Manual
Voltage............................: 1.4125v
IMC Voltage........................:1.2875v
DRAM Voltage.......................: 1.65v
CPU PLL Voltage....................: 1.90v
PCH Uoltaqe........................: 1.05v
DRAM DATA REF Voltage on A.........:[Auto] 
DRAM CTRL REF Voltaqe on A.........: [Auto]
DRAM DATA REF Voltaqe on B.........:[Auto] 
DRAM GIRL REF Voltaqe on B.........:[Auto]
Load Line Calibration..............:[Disabled]
CPU Spread Spectrum................: [Disabled]
PCIE Spread Spectrum...............:[Disabled]
[b][u]CPU Settings[/u][/b]
CPU Ratio Setting..................: 21 
C1E Support........................:  [Disabled]
Hardware Prefetcher................:  [Enabled]
Adjacent Cache Line Prefetch.......:  [Enabled]
Max CPUID Value Limit..............: [Disabled]
Intel (R) Virtualization Tech......:  [Disabled]
CPU TM Function....................:  [Enabled]
Execute-Disable Bit Capability.....:[Disabled]
Active Processor Cores.............:  [All]
A2OM...............................:  [Disabled]
Intel(R) SpeedStep(TI1) Tech.......:  [Disabled]
InteI (R) TurboMode  Tech..........:  [Disabled]
Intel® C-Start Tech ..............: [Disabled]
 
I appreciate that, let me try. On another note, when I received the CPU from newegg, it was in an open box. I didn't ORDER an open box, but I got one. I'm thinking some other overclocker got their paws on this CPU before I got it. =Þ
 
I tried those settings, and it failed to post. I think I may have to RMA this chip. Does anyone have experience RMAing a CPU through newegg? I called them 3 weeks ago to initiate an RMA since the CPU came in an open box, but my coworkers talked me into trying the chip before sending it back. Now it has Arctic Silver 5 on it. Is the open box still a sufficient reason to RMA, or should I tell them that it doesn't overclock well?
 
Under DRAM Timing Control, leave all of the sub-timings on Auto, except for the four primary timings (9-9-9-24) and Timing Mode (CMDR / Command Rate) - 2N. Also change DRAM Driving and SlewRate Control to Auto.

Edit: You could also try using a XMP memory profile. Depending on the RAM, Profile #1 should adjust the DRAM timings and voltage accordingly at DDR3-1600.
 
Last edited:
Those are the settings I was using for the overclocking when I got the high voltages and temps, except I was using manual instead of XMP.

I started by lowering my CPU multiplier to 12x and RAM multiplier to 2:6 and increasing bclck until I hit 200 with a stable VTT. Then I increased the RAM multiplier so I was running 1600. I ran Prime95 with those settings (12x200) and 1600MHz RAM for an hour with no problems. That was with vCore Auto and VTT 1.3625.

Then I reduced the bclck to 140 and increased the multiplier to 21x. I increased the bclck by increments of 10 and vCore by increments of 0.025 to remain stable. Around 21x180 was working decently at lower voltages. When I got to 21x190, I was using a 1.425V vCore, and Prime95 only ran stable for 15 minutes reaching 83C. Those numbers seem WAY too high.
 
From my experience so far, I can suggest running the Xiggy north south instead of east west, for me this yielded better temps. Also in the countless times I've installed this heatsink, I've always had the best results spreading the TIM across the heatsink, filling in the gaps, and putting two small lines across the non-copper part of the heatsink. The Xigmatek I have is kind of funny if I don't do this, temps vary a lot.

Also, you should try running the 20 multiplier, it could be that your chip just doesn't run well at the 21 multiplier. I realize some other people have had more success with odd multipliers, particularly with i7's, but you should try out 200x20. I've also had more luck with LLC on, but that's a toss up for most people.
 
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