8500CL5D-4GBPK with GA-EP35-DS3L -- 8GB unstable

[anthony]

I just added a second pair of 8500CL5D-4GBPK, but I can't get 8GB to run at 1066 MHz. With 4GB, everything runs fine -- 1066 MHz at 5-5-5-15, with either the old or new sticks. I've tried adjusting the BIOS settings following the instructions in the Installation Guide, but nothing seems to work. Any ideas?

Thanks in advance.

GA-EP35-DS3L, F6 bios
F2-8500CL5D-4GBPK (4DIMM)
E7200 at 2.53GHz (266x9.5)

[Dumaine]

might have to raise the CPU voltage a tick or so, MC to around 1.4 and tRFC (try around mid 80s might get it up around 88 or so) and might have to give the memory itself a lil voltage bump as well, also set Command Rate to 2T

[anthony]

Dumaine -- thanks for the quick response.

Overall, much better, but I am still having failures in memtest86+, Test #5.

I set tRFC to 88. I've got +0.3V on the RAM, giving ~2.1V; I also added +0.1V on FSB and +0.1V on MCH. Bumping the CPU Vcore seemed to make things worse. Will keep trying....

[Tradesman]

I'd raise the FSB to 333, which is native for the mobo, to do so may require a little more voltage in the vCore

[anthony]

I can't get past Test #2 at 333. For now, I've dumbed things down to 4-4-4-12 at 800MHz at normal voltages. Thanks!

[anthony]

OK, I'm at 333 FSB, but 1066 MHz doesn't work (5-5-5-15, tRFC ~ 88, Vddr ~ 2.1V, Vcore bumped a bit); I get thousands of errors, versus hundreds at 266 FSB, 1066 MHz. The interesting thing is 333 FSB, 1000 MHz works great (5-5-5-15, Vddr ~ 2.0V), even with "turbo" setting (whatever that is). That's not a big jump, 1000 to 1066, but I've crossed some line.

Thanks for the help!

[Dumaine]

I would leave it there untill Tman or GSkill Tech get a chance to respond......My thoughts are to increase the FSB a tad more to get the memory back to 1066 (wich you might also have to add another tick or 2 on the CPU voltage) then you will have to also keep the MC and DRAM voltages in line to compensate as well..so now it sounds like a trial and error thing ( tinker,,,,test,,,,tinker,,,,,test)

[GSKILL TECH]

MCH Core 1.40V is necessary for 2.10V VDIMM.

If you continue to have issues after that, post up your complete settings or screen shots of it, and I will be able to immediately spot the issue.

Thank you
GSKILL SUPPORT

[anthony]

Thanks, GSkill Tech. Just to be sure, by setting MCH Core to 1.4V, do you mean G(MCH) to [+0.2V]? I don't have a way to know what actual FSB and MCH voltages are. My present settings below (GA-EP35-DS3L w Award Bios Rev F6):

Robust Graphics Booster [Auto]
CPU Clock Ratio [ 8 X]
Fine CPU Clock Ratio [+0.0]
CPU Frequency 266GHz(333x8)
CPU Host Clock Control [Enabled]
CPU Host Frequency(Mhz) [333]
PCI Express Frequency(Mhz) [Auto]
C.I.A.2 [Disabled]
System Memory Multiplier(SPD) [3.00]
Memory Frequency(MHz) 800 1000
Performance Enhance [Turbo]
DRAM Timing Selectable (SPD) [Manual]
CAS Latency Time 5 [5]
DRAM RAS# to CAS# Delay 5 [5]
DRAM RAS# Precharge 5 [5]
Precharge Delay(tRAS) 15 [15]
ACT to ACT Delay (tRDD) 3 [Auto]
Rand Write to READ Delay 3 [Auto]
Write To Precharge Delay 6 [Auto]
Refresh To ACT Delay 52 [ 88]
Read to Precharge Delay 3 [Auto]
tRD 4 [Auto]
tRD Phase Adjustment 0 [Auto]

System Voltage Control [Manual]
DDR2 OverVoltage Control [+0.2V]
PCI-E OverVoltage Control [Normal]
FSB OverVoltage Control [Normal]
G(MCH) OverVoltage Control [Normal]
CPU OverVoltage Control [1.15000V]
Normal CPU Vcore [1.13750V]

Vcore 1.124V
DDR18V 2.000V

[GSKILL TECH]

Robust Graphics Booster [Auto]
CPU Clock Ratio [ 8 X]
Fine CPU Clock Ratio [+0.0]
CPU Frequency 266GHz(333x8)
CPU Host Clock Control [Enabled]
CPU Host Frequency(Mhz) [333]
PCI Express Frequency(Mhz) [Auto]
C.I.A.2 [Disabled]
System Memory Multiplier(SPD) [3.20B]
Memory Frequency(MHz) 800 1066
Performance Enhance [Standard]
DRAM Timing Selectable (SPD) [Manual]
CAS Latency Time 5 [5]
DRAM RAS# to CAS# Delay 5 [5]
DRAM RAS# Precharge 5 [5]
Precharge Delay(tRAS) 15 [15]
ACT to ACT Delay (tRDD) 3 [Auto]
Rand Write to READ Delay 3 [Auto]
Write To Precharge Delay 6 [8]
Refresh To ACT Delay 52 [ 88]
Read to Precharge Delay 3 [Auto]
tRD 4 [Auto]
tRD Phase Adjustment 0 [Auto]

System Voltage Control [Manual]
DDR2 OverVoltage Control [+0.3V]
PCI-E OverVoltage Control [Normal]
FSB OverVoltage Control [Normal]
G(MCH) OverVoltage Control [+0.3V]
CPU OverVoltage Control [1.15000V]
Normal CPU Vcore [1.13750V]

Thank you
GSKILL SUPPORT

[anthony]

Nope.

I made the changes EXACTLY as above -- I get hundreds, even thousands, of errors (memtest86+). I also tried bumping Vcore without success. So I am back to DDR1000 at 5,5,5,15 -- but I'm not complaining. I get ZERO errors with these settings, and the computer seems very crisp and very stable.

I'll keep trying, if you've got more ideas, but I'm not losing sleep over 1000 MHz versus 1066 MHz, even though it's supposed to work. Thanks for your help getting things working again!


P.S. I think I'll put a turbocharger in the minivan next....

[tbeacleay]

I have the same board and same memory and I can't even get video if I put in more than 2 sticks(any 2).