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Intel D945G and DDR2 800MHz aka PC2-6400

post #1 of 10
Thread Starter 
Yep, I am a newbie to overclocking, so please bear with me.

I am planning on purchasing an Intel motherboard with the D945G chipset, specifically BOXD945GNTLR. Out of the box it supports DDR2 667MHz. I would like to try to use Kingston's HyperX module, KHX6400D2K2/2G which is a kit of two 1GB DDR2 800MHz modules. I know attempting to that RAM would invlove overclocking the board.

I have no idea what is involved, how complicated it would be, and if it is even possible. Anybody else out there have any experience getting DDR2 800MHz memory to work in Intel boards with the D945G chipset?

-Mike
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750GB (RAID) Sony DVDRW XP Pro SP2 21in IBM Trinitron 
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post #2 of 10
Well, first off, if you want to overclock, you will not want that board. Intel boards do not OC well as most BIOS options are locked, or severly limited.

If you want to OC a 945 chipset, check out the P5LD2 from ASUS.


Usually you can use faster RAM and it will just underclock itself to the default of the board, which is fine, gives you room for tighter timings.


And welcome to the forums!!!!

post #3 of 10
Thread Starter 
Thumper,

Thanks for your reply. I am set on this board. We use Intel boards at work and I am a very big fan of their rock solid stability. It's really not a question of whether or not I buy the board, but whether or not I buy the RAM or play it safe.

If someone could tell me what BIOS settings to look for, I could monkey around with one of the systems we build at work to see if it has those options.

-Mike
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750GB (RAID) Sony DVDRW XP Pro SP2 21in IBM Trinitron 
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Pentium 4 631 3.0GHz BOXD945GNTLR ATI x800 All-In-Wonder 2GB DDR2 667MHz 
Hard DriveOptical DriveOSMonitor
750GB (RAID) Sony DVDRW XP Pro SP2 21in IBM Trinitron 
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post #4 of 10
It'll either be under Advanced CMOS settings or something similar. pauldovi, has said they allowed some overclocking options in some of the newer BIOS revisions for the 925XE chipset.

If you really are serious about getting into this hobby (more like addiction), you'll really want a better MOBO. ASUS's P5WD2-E Premium is one of the best for Intel CPUs. I don't think you can go wrong with ASUS, ABIT, DFI, or any of the other major manufacturers.

Your RAM will run at whatever speed your CPU is rated for at stock. On Intel's they are usually 200 MHz from the start. As you overclock your FSB, your RAM will follow suit. What I'm trying to say is even though the MOBO says it supports DDR667, it'll accept any speed of RAM as long as it's DDR2.
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post #5 of 10
Thread Starter 
Quote:
If you really are serious about getting into this hobby (more like addiction), you'll really want a better MOBO. ASUS's P5WD2-E Premium is one of the best for Intel CPUs. I don't think you can go wrong with ASUS, ABIT, DFI, or any of the other major manufacturers.
I'm really not interested in making overclocking a full time hobby. If I devote anymore time to my computer than I already do, my girlfriend will leave me. I understand that other MOBO's have better overclocking features, but I am pretty much dead set on that Intel board.

Quote:
Your RAM will run at whatever speed your CPU is rated for at stock. On Intel's they are usually 200 MHz from the start. As you overclock your FSB, your RAM will follow suit. What I'm trying to say is even though the MOBO says it supports DDR667, it'll accept any speed of RAM as long as it's DDR2.
Well, out of the box the FSB is 800MHz. So are you saying I don't need to do anything and my board will run the PC2-6400 at 800MHz? I thought FSB and Memory frequencies were two totally seperate things?

Quote:
It'll either be under Advanced CMOS settings or something similar. pauldovi, has said they allowed some overclocking options in some of the newer BIOS revisions for the 925XE chipset.
I took a look at the BIOS of another system running this board and wrote down a few things from the Advanced menu. I don't know if any of you can decipher this, but I ususally don't mess with this section so I have no clue what most of this means.

I can set Memory configuration to "Manual-User Defined" and it opens up these options:

Frequency: 400, 533, or 667
SDRAM tCL: 5, 4, or 3
SDRAM tRCD: 2, 3, 4, 5
SDRAM tRP: 2, 3, 4, 5
SDRAM tRASmin: 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, or 15

That last one, tRASmin seems to depend on the other 3 options. Whatever is set for tCL, tRCD, or tRP determines what you can set for tRASmin. Sometimes it only allows you to go up to 13, other times it is locked at 4, etc.

There is also something called Burn-in Mode with these options:

Host Burn-in Mode Type: Positive or Negative

Host Burn-in Mode Percentage: 0,1,2,3, or 4

PCI Burn-In Mode: Default or 40.00MHz

PCI Express Burn-in Mode: Defualt, 101.32MHz, 102.64MHz, 103.46MHz, 105.28MHz, 106.6MHz, 107.92MHz, or 109.24MHz

The thing that caught my attention the most was the RAM frequency can only be set to 400, 533, or 667 which would lead me to believe there is no way to get the board to run PC2-6400 at 800MHz. Unless of course tweaking one of those other settings gets around that.

-Mike
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Pentium 4 631 3.0GHz BOXD945GNTLR ATI x800 All-In-Wonder 2GB DDR2 667MHz 
Hard DriveOptical DriveOSMonitor
750GB (RAID) Sony DVDRW XP Pro SP2 21in IBM Trinitron 
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My System
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CPUMotherboardGraphicsRAM
Pentium 4 631 3.0GHz BOXD945GNTLR ATI x800 All-In-Wonder 2GB DDR2 667MHz 
Hard DriveOptical DriveOSMonitor
750GB (RAID) Sony DVDRW XP Pro SP2 21in IBM Trinitron 
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MS Office Keyboard Antec SmartPower SP-450 Antec P160W MS Trackball Explorer 
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post #6 of 10
The frequency you see is the divider setting, i.e. FSB: DRAM is how your dividers are usually laid out. FSB at 200MHz and DRAM at 200MHz (DDR400) is a 1:1 setting since 200:200 equals 1:1. FSB at 200 and DRAM at 266 (DDR533) is a 3:4 and so on.

Don't be confused on what your CPUs FSB is. It is actually 200 MHz and then your MOBO "quad pumps" the speed to get your FSB. 200Mhz x 4 = 800MHz.

Also with your RAM the speed your DRAM is set for is multiplied by 2 to get your DDR rate. In my case 247Mhz x 2 = 494Mhz or DDR494.
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post #7 of 10
Thread Starter 
Ok, well based on the BIOS options I listed, does it look I'll be able to do what I want to do?
My System
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CPUMotherboardGraphicsRAM
Pentium 4 631 3.0GHz BOXD945GNTLR ATI x800 All-In-Wonder 2GB DDR2 667MHz 
Hard DriveOptical DriveOSMonitor
750GB (RAID) Sony DVDRW XP Pro SP2 21in IBM Trinitron 
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MS Office Keyboard Antec SmartPower SP-450 Antec P160W MS Trackball Explorer 
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My System
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CPUMotherboardGraphicsRAM
Pentium 4 631 3.0GHz BOXD945GNTLR ATI x800 All-In-Wonder 2GB DDR2 667MHz 
Hard DriveOptical DriveOSMonitor
750GB (RAID) Sony DVDRW XP Pro SP2 21in IBM Trinitron 
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MS Office Keyboard Antec SmartPower SP-450 Antec P160W MS Trackball Explorer 
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post #8 of 10
Quote:
Originally Posted by mike72278
Ok, well based on the BIOS options I listed, does it look I'll be able to do what I want to do?
You will be able to run the ram just fine. NOT at 800mhz because the mb wont let you. Set it to 667 and tighten the timings up from stock. I have some 1000mhz ram that runs at 5-4-4-9 at 1000mhz...it will also do 3-3-3-7 at 667 mhz. Because the ram is rated for faster than your mb will support just means it is capable of faster speeds and tighter timings than you can get, but it will run just fine. As others have said....if you want to get the full 800mhz out of it, you will need a different mb.
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post #9 of 10
Thread Starter 
Ahh, Ok thanks Busa. I just needed someone to beat it over my head for me in plain English. Sorry I'm such a n00b lol.

-Mike
My System
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CPUMotherboardGraphicsRAM
Pentium 4 631 3.0GHz BOXD945GNTLR ATI x800 All-In-Wonder 2GB DDR2 667MHz 
Hard DriveOptical DriveOSMonitor
750GB (RAID) Sony DVDRW XP Pro SP2 21in IBM Trinitron 
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MS Office Keyboard Antec SmartPower SP-450 Antec P160W MS Trackball Explorer 
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My System
(13 items)
 
  
CPUMotherboardGraphicsRAM
Pentium 4 631 3.0GHz BOXD945GNTLR ATI x800 All-In-Wonder 2GB DDR2 667MHz 
Hard DriveOptical DriveOSMonitor
750GB (RAID) Sony DVDRW XP Pro SP2 21in IBM Trinitron 
KeyboardPowerCaseMouse
MS Office Keyboard Antec SmartPower SP-450 Antec P160W MS Trackball Explorer 
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post #10 of 10
Thread Starter 
By the way, even though I don't plan on diving head first into the Overclocking world, I have been perusing some of the forums and guides and there's a lot of good information on this site. I'll probably be sticking around.

Thanks again all!

-Mike
My System
(13 items)
 
  
CPUMotherboardGraphicsRAM
Pentium 4 631 3.0GHz BOXD945GNTLR ATI x800 All-In-Wonder 2GB DDR2 667MHz 
Hard DriveOptical DriveOSMonitor
750GB (RAID) Sony DVDRW XP Pro SP2 21in IBM Trinitron 
KeyboardPowerCaseMouse
MS Office Keyboard Antec SmartPower SP-450 Antec P160W MS Trackball Explorer 
  hide details  
Reply
My System
(13 items)
 
  
CPUMotherboardGraphicsRAM
Pentium 4 631 3.0GHz BOXD945GNTLR ATI x800 All-In-Wonder 2GB DDR2 667MHz 
Hard DriveOptical DriveOSMonitor
750GB (RAID) Sony DVDRW XP Pro SP2 21in IBM Trinitron 
KeyboardPowerCaseMouse
MS Office Keyboard Antec SmartPower SP-450 Antec P160W MS Trackball Explorer 
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