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04-21-2008, 09:07 PM #1
Manually Setting Your Memory Timings and Voltage!!
I just wanted to ensure that everyone has their RAM voltages set correctly in the BIOS. RAM voltages differ from manufacture to manufacture so be sure to check with them to find the proper settings. If your voltage is too low you can and most likely will run into issues. On the other hand if it is too high you risk damaging your RAM.
Last edited by XFX Tech; 08-04-2008 at 10:22 PM. Reason: Adding PDF
04-22-2008, 10:16 PM #2htmldesign Guest
could it possibly cause a no startup when other devices (such as HD) is plugged in?
06-24-2008, 08:39 AM #3harry Guest
I had OCZ ddr3 mem rated at 1.8 volts, and the 790i mobo comes standard with 1.5 Volt settings.
The undervoltage protection prevents the system to start.
Drove my nuts at the start. computer seems normal, but no signal to HD and graphics.
The weird thing is that you cannot enter bios to alter the voltage settings, unless you use some cheap 1.5volt memory.
Hope this helps you a bit.
08-04-2008, 11:30 PM #4
I posted a PDF in the first message. I need to grab screens of every BIOS we have but the two main ones are in there, the Intel AWARD BIOS and the AMI AMD BIOS.
Last edited by XFX Tech; 09-08-2008 at 04:37 PM. Reason: Typo
10-06-2008, 08:16 AM #5B007Cyber Guest
SLi Memory Settings
Joined the forum today as I recently got a new XFX Mobo and found your site to provide some good support info. Hope you could help.
Just installed the XFX 780i 3-way SLi Mobo with OCZ Fatality DDR-1066 memory (4x 1GB sticks). The BIOS (P0 main screen shows the SLi ready status of memory as "Disabled" and according to manual it then has detected SLi ready RAM. It does however not allow me to "Enable" this setting and I have to manually set the RAM speed to 1066 (set as Linked and divider of 5:4).
Your advice will be great.
10-06-2008, 02:19 PM #6
You should start your own thread with this issue.Viper: Intel I7 3960X | TT Extreme Water 2.0 Cooler | Asus Sabertooth X79| NVIDIA GTX680| 32GB GSkill RAM | 512GB Crucial M4 SSD | 2TB Seagate | Asus DVD-RW | TT 1200Watt Power Supply | Dell 2707 Monitor | Logitech Z5500 Digital Speaker | Logitch G15 Gaming Keyboard | Logtiech MX Wireless Mouse | Windows 7 64 Ultimate |
10-06-2008, 05:13 PM #7
That is normal for four sticks. EPP only stores a two stick profile. You will always have to set your settings manually with fours sticks.
10-06-2008, 06:43 PM #8markymark Guest
i have the xfx 790i ultra sli and am running 4x1gig sticks of ocz ddr3 2000mhz sli ram, are these settings in the pdf doc relevant for my ram??? tnx for starting this thread as it will help a few people im guessing??
10-06-2008, 06:52 PM #9
The screens for the AWARD BIOS are from the 780i so the timings will be lower since it uses DDR2. For the 790i 2GHz DDR3 you are probably talking more like 9-9-9-28 2T and 1.9-2.0v. It will depend on the chips that were used on the sticks by the manufacturer. If you haven't already than be sure that you update to the latest BIOS for the board.
10-06-2008, 07:23 PM #10markymark Guest
02-26-2009, 03:48 AM #11lucafett Guest
Could this prevent you from using multiple sticks?
Ok, I have a XFX X58i and im running into problems with it not posting when there are more than 1 sticks of DD3 1333 memory in it... now my question is, could the undervoltage be preventing my motherboard from posting when more than 1 stick is in it, meaning, will changing the voltage maybe help in making the motherboard boot and recognize all 6gb of ram? funny thing is it posted ONCE with all 3 sticks in it, but then never again... thanks for your prompt reply, im going nuts here...
02-26-2009, 05:44 AM #12lucafett Guest
Nevermind, doesnt work
Well, found out my memory works with 1.5V, changed that in Bios to force it, installed the other 2 dimms (the ones that are not working) and it will not post, so sorry for the question, and in case anyone else was wondering... Changing your voltage will not fix the X58i problem of not posting with more than 1 2gb pc 1333 stick in it...
02-26-2009, 10:13 AM #13
More ram = more stress. More power compensates for more stress.
CPU : 2.66Ghz Q9450 Yorkfield (775 Pin) @ 3.20Ghz/400/1600FSB/1.23V
CPU Cooler : ZALMAN 9700 | Mobo : ASUS P5E Deluxe - x48 - Bios ---
Ram : Corsair Dominator 4GB (2 x 2G) DDR2 1066 5-5-5-15/T2/3:4/2.1V
HardDrives : Raid-0 2x Seagate Barracuda ES.2 250GB - Backup Raid-0 Western Digital Caviar Green 1TB
PCI-e 1x : Creative Sound Blaster X-Fi Titanium Fatal1ty Professional | Graphics Card : EVGA GTX295 Superclocked 1792MB
PhysX Card: EVGA 9600GSO 1GB | Case : Cooler Master Cosmos S
Fans : 1x CoolerMaster 200mm Fan, 6x 120mm Fans
PSU : Silverstone ST75F 750w | Floppy : Deleted | Drive 1 : PHILIPS 20X DVD±R DVD Burner
Windows XP PRO 32bit.
Monitor One : SAMSUNG T260HD TOC r25.5" | Monitor Two : SAMSUNG T220 TOC 22" | Speakers : Altec Lansing 2.1 FX6021
Headset : Sennheiser Pc156 | Keyboard : Logitech UltraX | Mouse Logitech G7 | Tablet : WACOM intuos3 6x11
03-11-2009, 06:27 PM #14towerelect Guest
OK Gang just posted my support ticket request today. OCZ Platinum 3x2GHz sticks of PC3 12800 bandwidth 1600 Mhz hand matched set. Only slots 1 and 2 'work' giving me 4Gb Max on the X58i Motherboard. Most memory bios settings are greyed out and I can not access them. I see no way of getting the other 4 slots to 'see' the other 2gb board. Error codes are 88 and nothing (most common) or advance to d4 and halt before POST finished (When more than slots 1 and 2 are in use).
I have not enough information from the manufacture's web site to set up this DIMM using the few settings that I can access in Bios, which I have updated from the Intel site to the latest. Just woot is now called 'over clocking' but everything else is the same and as I say most memory settings are grey and I can not go there.
05-06-2009, 10:37 PM #15Teej2009 Guest
I followed the PDF from the initial post, however, in my JustWoot, some of the options don't allow me to choose the posted setting.
Just for example, the Tras in the screenshot is set to 18, but my highest option might be 15. I found this with at least two of the settings.
Also on page 5, it says "Set your DRAM Voltage Control as instructed".
As instructed where??!!!!
I am working with the 750a mobo and am trying to get my system to recognize the 1066 speed of my RAM. It is registering as 800 with Nvidia System Tools.
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