Memory Voltage and timings issue

Sola1280 · 04-24-2008, 09:53 PM

i have 2GB corsair twinx-2048-PC6400 (matched pair) ddr2 800mhz ram and it comes with a second profile set @ 4-4-4-12 @ 2.1V default is 5-5-5-18 @ 1.8v. anyway when i set the bios to use the second profile the pc will not boot. the ram itself according to corsair was tested and confirmed to work at said timings. it does boot @ lower volatges so far up to 1.96 and is stable. kinda curious why it wont boot @ 2.1.

My motherboard is an intel D975XBX2 and from i have read it should support the second profile. im not really sure what the deal is. any help is welcomed

ScuzziOne · 04-25-2008, 07:57 PM

Excessive ground bounce maybe... LOL! Total system noise floor is beyond the control of the memory manufacturer...

**specmike** · 06-17-2008, 11:02 PM

Quote:

Originally Posted by Sola1280

i have 2GB corsair twinx-2048-PC6400 (matched pair) ddr2 800mhz ram and it comes with a second profile set @ 4-4-4-12 @ 2.1V default is 5-5-5-18 @ 1.8v. anyway when i set the bios to use the second profile the pc will not boot. the ram itself according to corsair was tested and confirmed to work at said timings. it does boot @ lower volatges so far up to 1.96 and is stable. kinda curious why it wont boot @ 2.1.

My motherboard is an intel D975XBX2 and from i have read it should support the second profile. im not really sure what the deal is. any help is welcomed

Sorry I missed this post. Have you resolved this?

INVALiD · 06-18-2008, 01:19 AM

Curious, I seem to be stuck at 5-5-5-15
On a DG965OT intel board with Corsiar DDR2 1.8v

**specmike** · 06-18-2008, 01:28 AM

Check the manual or with Intel to see if that MOBO offers any OCing options in the bios. If not, you cannot change these settings. If you have an ongoing issue, it's best to start your own thread since this thread deals with a different MOBO, chipset, memory, different issue, etc etc.

Sola1280 · 09-15-2008, 12:03 AM

Quote:

Originally Posted by specmike

Sorry I missed this post. Have you resolved this?

actually , no i havent figured it out yet. tried different bios versions, tried with only modified ram timings and all other settings @ default. seems as though the max voltage i can boot with at the lower timings is 1.96v. dont know what i am missing

ATINUT · 09-15-2008, 08:01 AM

I've got the same D975XBX2 motherboard, and it would really help to know what bios revision you are running. I'm running bios revision 2831, and I can set the memory voltage to 2.1 volts for my memory if need be and still boot.

It could be possible, that the memory let you go beyond 1.96 volts. I would just set the memory to 1.96 volts and use the lower timings and be done with it, rather than worrying, and end up with a lot of headaches in the end.

Sola1280 · 09-15-2008, 05:08 PM

Quote:

Originally Posted by ATINUT

I've got the same D975XBX2 motherboard, and it would really help to know what bios revision you are running. I'm running bios revision 2831, and I can set the memory voltage to 2.1 volts for my memory if need be and still boot.

It could be possible, that the memory let you go beyond 1.96 volts. I would just set the memory to 1.96 volts and use the lower timings and be done with it, rather than worrying, and end up with a lot of headaches in the end.

i have the same revision as you. But have still not been able to boot @ 2.1V. I have it set at the lower timings @ 1.96V so im not really worried about it. just curious thats all. just trying to get the maximum amount of performance i can.

zapionics<alt> · 09-15-2008, 06:59 PM

How do you know the board is delivering the voltage it says in the BIOS anyway? I've often found that I need to increase or decrease the vdimm slightly to get stability... I've had this happen on various vendors boards over the years...
so that 2.1 may in reality be more or less... for all we know...

ATINUT · 09-15-2008, 08:24 PM

Quote:

Originally Posted by Sola1280

i have the same revision as you. But have still not been able to boot @ 2.1V. I have it set at the lower timings @ 1.96V so im not really worried about it. just curious thats all. just trying to get the maximum amount of performance i can.

In that case, I wouldn't worry as long as the memory is working fine and stable, with it's EPP timings as it is more commonly known at 1.96 Volts.

The memory I have, which is seen in my signature from Mushkin, runs fine and is stable with the EPP timings at the default voltage of 1.8 volts.

Sola1280 · 09-16-2008, 03:28 PM

hey some good news, i rolled back the bios and then re-flashed it with the current revision and bam boots fine @ 2.1V. not sure why the first bios update didnt go so well, i did not get any errors when i updated it the first time. but all is well now.

04-24-2008, 09:53 PM	#1
Sola1280 Registered User Join Date: Mar 2008 Location: Delaware Posts: 28	Memory Voltage and timings issue i have 2GB corsair twinx-2048-PC6400 (matched pair) ddr2 800mhz ram and it comes with a second profile set @ 4-4-4-12 @ 2.1V default is 5-5-5-18 @ 1.8v. anyway when i set the bios to use the second profile the pc will not boot. the ram itself according to corsair was tested and confirmed to work at said timings. it does boot @ lower volatges so far up to 1.96 and is stable. kinda curious why it wont boot @ 2.1. My motherboard is an intel D975XBX2 and from i have read it should support the second profile. im not really sure what the deal is. any help is welcomed Last edited by Sola1280 : 04-24-2008 at 10:10 PM.
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04-25-2008, 07:57 PM	#2
ScuzziOne Registered User Join Date: Jan 2008 Posts: 25	Re: Memory Voltage and timings issue Excessive ground bounce maybe... LOL! Total system noise floor is beyond the control of the memory manufacturer...
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06-18-2008, 01:19 AM	#4
INVALiD Registered User Join Date: Jun 2008 Posts: 65	Re: Memory Voltage and timings issue Curious, I seem to be stuck at 5-5-5-15 On a DG965OT intel board with Corsiar DDR2 1.8v
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06-18-2008, 01:28 AM	#5
specmike Yes, Yellowbeard Join Date: Oct 2002 Location: Metro Atlanta, GA. Posts: 2,621	Re: Memory Voltage and timings issue Check the manual or with Intel to see if that MOBO offers any OCing options in the bios. If not, you cannot change these settings. If you have an ongoing issue, it's best to start your own thread since this thread deals with a different MOBO, chipset, memory, different issue, etc etc. __________________ OFFICIAL CORSAIR TECH SUPPORT
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09-15-2008, 08:01 AM	#7
ATINUT Just Plain Crazy! Join Date: Apr 2002 Posts: 3,251	Re: Memory Voltage and timings issue I've got the same D975XBX2 motherboard, and it would really help to know what bios revision you are running. I'm running bios revision 2831, and I can set the memory voltage to 2.1 volts for my memory if need be and still boot. It could be possible, that the memory let you go beyond 1.96 volts. I would just set the memory to 1.96 volts and use the lower timings and be done with it, rather than worrying, and end up with a lot of headaches in the end. __________________ Intel D975XBX2 Intel Core 2 Duo E6600 8GB's of Mushkin HP2 6400 memory(DDR2 800) Visiontek Radeon 3870X2 videocard HT Omega Claro(Cmedia 8788HD chip) 120GB&200GB&320GB Western Digital harddrives LG DVDROM & LG DVDBURNER HP Deskjet 920C Logitech X-540 speakers Viewsonic VG2030wm 20inch Widescreen LCD Windows Vista 64 Ultimate Who'se the fool that approved the design for this place. - The Dwarf, Sacred Underworld.
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09-15-2008, 06:59 PM	#9
zapionics<alt> <unknown level> Join Date: Dec 2002 Location: AUSTRALIA Posts: 2,846	Re: Memory Voltage and timings issue How do you know the board is delivering the voltage it says in the BIOS anyway? I've often found that I need to increase or decrease the vdimm slightly to get stability... I've had this happen on various vendors boards over the years... so that 2.1 may in reality be more or less... for all we know... __________________ "To Boldly Go..."
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09-16-2008, 03:28 PM	#11
Sola1280 Registered User Join Date: Mar 2008 Location: Delaware Posts: 28	Re: Memory Voltage and timings issue hey some good news, i rolled back the bios and then re-flashed it with the current revision and bam boots fine @ 2.1V. not sure why the first bios update didnt go so well, i did not get any errors when i updated it the first time. but all is well now.
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