i7 920 D0 - DFI UT X58-T3EH8 prime95/linx stability ?

cstkl1 · 09-04-2009, 10:38 PM

hey i can post now.

hey eva can u post a 2000mhz CL7 prime 95 2 hours or 10 runs of linx/ibt 5gb
it allways hangs and requires more vtt voltage than memtest hci.
the problem seems to be the pwm frequency

anyway here is a d0 stepping confirmed ibt stable 20 rounds tested prior at stock voltage 4.2ghz ht off

eva2000 · 10-04-2009, 04:06 AM

SWEET D0! But normal for linx and Prime95 (blend especially) to require more CPU VTT

i edited your post to change IMG to IMGFS tags to make it easier for folks on smaller width screens.

Screenshot Tip:

Smaller sized screenshots retaining image quality (PNG): Method 1, Method 2
IMGF/IMGFS/URLF custom bbcode tags for i4memory.com forums

As to my settings

bios settings

Code:

Genie BIOS Setting

CPU Feature
Set VR Current Limit Max: Enabled
Thermal Management Control: Disabled
EIST Function: Disabled
CxE Function: Disabled
Execute Disable Bit: Disabled
Virtualization Technology: Disabled
TDC Enable: Disabled
x TDC Limit: 0
TDP Enable: Disabled
x TDP Limit: 0

***** Logical Processor Setting *****
Intel HT Technology: Enabled
Active Processor Cores: All

DRAM Timing
Channel Interleave Setting: AUTO
Rank Interleave Setting: AUTO
Memory LowGap: 1536M

DRAM Command Rate: AUTO/1N/2N etc
CAS Latency Time (tCL): 7
RAS# to CAS# Delay (tRCD): 8
RAS# Precharge (tRP): 7
Precharge Delay (tRAS): 20
REF to ACT Delay (tRFC): AUTO
Write to PRE Delay (tWR): AUTO
Rank Write to Read (tWTR): AUTO
ACT to ACT Delay (tRRD): AUTO
Row Cycle Time (tRC): AUTO
Read CAS# Precharge (tRTP): AUTO
Four ACT WIN Time (tFAW): AUTO

Voltage Setting
O.C. Shut Down Free: Enable O.C.S.D.F
CPU VID Control: 1.3500v
CPU VID Special Add Limit: Enabled
CPU VID Special Add: Auto
Vcore Droop Control: Enabled
DRAM Bus Voltage: 1.650v
DRAM PWM Switch Frequency: Nominal
DRAM PWM Phase Control: 2 Phase Operation
CPU VTT Special Add: AUTO
CPU VTT Voltage: 1.4v
VTT PWM Switch Frequency: Nominal
VTT PWM Phase Control: 2 Phase Operation
CPU PLL Voltage: 1.80v
IOH/ICH 1.1V Voltage: 1.11v
IOH Analog Voltage: 1.10v
ICH 1.5 Voltage: 1.5v
ICH 1.05V Voltage: 1.05v
DIMM 1/2 DQ/DQSTB Bus VREF: -00.0%
DIMM 3/4 DQ/DQSTB Bus VREF: -00.0%
DIMM 5/6 DQ/DQSTB Bus VREF: -00.0%
ADDR/CMD VREF Control: Disabled
x DIMM 1/2 ADDR/CMD Bus VREF: 110
x DIMM 3/4 ADDR/CMD Bus VREF: 110
x DIMM 5/6 ADDR/CMD Bus VREF: 110
CPU QPI Drive Strength: Normal
IOH QPI Drive Strength: Normal

Exit Setup Shut down: Mode 2
O.C. Fail Retry Counter: Enabled
O.C. Fail CMOS Reload: Disabled

PPM Function: Enabled
Turbo Mode Function: Disabled
1 core Max Turbo Ratio: 22x
2 core Max Turbo Ratio: 21x
3 core Max Turbo Ratio: 21x
4 core Max Turbo Ratio: 21x
CPU Non-Turbo Clock Ratio: 19x

* BCLK/UCLK/QPI Controller Settings *
QPI Control Settings: Enabled
QPI Link Fast Mode: Enabled
QPI Frequency: AUTO
CPU Base Clock (BCLK): 200 Mhz
Boot Up CPU Base Clock: AUTO
PCIE Clock: 100 Mhz
DRAM Frequency: 10x Memory multipliers
UnCore Frequency: 20x Uncore multipliers (optimal to keep Uncore at 2x DRAM Frequency)

CPU Spread Spectrum: Disabled
PCIE Spread Spectrum: Disabled

cstkl1 · 10-04-2009, 04:20 AM

hmm my voltages are different
wondering how whether its the psu

if i set 1.65v i get 1.63v, i need 1.64v for my gt's so set at 1.665v
ioh/ich set 1.15 gets 1.13v
vtt set 1.45v gets idle 1.43 load 1.45v

but as before with my c0 same problem
ure linx ure stressing only 4 cores.. ( can tell from the completion time 255 secs. full 8 threads is less around 200s for 5.4gb) testing now lowered to 3.8 HT ON.

btw thanks for the screenshot guide

cstkl1 · 10-04-2009, 04:29 AM

eh nope same problem even at 3.6ghz, 3.8ghz ht on linx stress like ures
hangs..

any advice??tested even cl9 same issue.

althought memtest hci passes even up to 2000%
but no go for prime95 and linx whenever i use ram 2000mhz for blend.

eva2000 · 10-04-2009, 04:37 AM

Yes psus will effect the different discrepancies between what set in bios versus what is measured real or with SG app.

My Corsair HX1000 over volts ever so slighty less for real vdimm than my Silverstone OP1200.

i.e.

1.635v vdimm HX1000 = 1.6355v real DMM and 1.64v SG
1.635v vdimm OP1200 = 1.6359v real DMM and 1.64v SG

could of sworn it was 100% cpu load stressed with 0.5.6

By cstkl1

eh nope same problem even at 3.6ghz, 3.8ghz ht on linx stress like ures
hangs..

any advice??tested even cl9 same issue.

althought memtest hci passes even up to 2000%
but no go for prime95 and linx whenever i use ram 2000mhz for blend.

Not sure how D0 behave for memory/cpu vtt relationship, but all I know and tips are here. So playing with VCORE/VDIMM/CPU VTT balance is probably what you need to do. Also don't underestimate the improvement just playing musical chairs with each memory module tried in a different combination in same dimm slots

With C0 stepping results i've seen and experienced myself, it can be a fine balance so far come across 4 types of core i7 cpus from my rounds on forums and my own experience

Type 1 - core i7 cpus that need high to very high cpu vtt to overclock for memory and bclk.

Type 2 - core i7 cpus that like low-medium low cpu vtt to overclock for memory and bclk and scale with cpu vtt and memory voltage

Type 3 - core i7 cpus that only like low-medium low cpu vtt to overclock for memory and bclk BUT DO NOT scale for either cpu vtt and memory voltage or both

Type 4 - core i7 cpus that like cpu vtt close to vcore so you may find the cpu needs high vcore for lower clocks due to cpu vtt requirement for those clocks.

low cpu vtt = 1.3-1.35v
medium cpu vtt = 1.35-1.5v
high cpu vtt = 1.5-1.55v
very high cpu vtt = >1.55-1.65v

Now no idea where your D0 falls in or if it's totally a different beast in terms of CPU VTT behaviour.

Since you have GT memory modules, also check out Elpida 50nmm Hyper IC thread at Core i7/x58 - Dealing with Elpida 50mm Hyper ICs and overclocking could be related to your issue ?

cstkl1 · 10-04-2009, 04:42 AM

nah think the stress test on the cpu doesnt matter
its the vtt voltage
linx ram at 1200mhz and 1600mhz pass ( CL6 no issue so the elpidas are fine)
2000mhz even at cl9 wont. even though memtest hci tested up to 5000 % ( yup left it for around 15 hours)
no clue as to why linx/prime blend will hang.
gaming no issue . benchies no issue.

eva2000 · 10-04-2009, 04:51 AM

definitely take a read of Core i7/x58 - Dealing with Elpida 50mm Hyper ICs and overclocking particularly ADDR/CMD Bus VREF tweaks and memory module musical chairs for testing all combinations for the 3 modules in same dimm slot

cstkl1 · 10-04-2009, 05:02 AM

actually that one i already tested also .
no difference
tested from 80 - 125 and vdimm from 1.665v set to 1.72v no diff
i did suspect it was a vtt issue
cause this issue is similar in RE
when the cmd/clk/ctl clock to dram nb and dram channel A/B vtt came to play. the linx hang was similar.

also weird part was memtest hci pass is actually set 1.65v

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