Question about Intel D875PBZ Motherboard

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Memory upgrade I do a lot of video rendering and gaming on my system so I just purchased corsair xms 2gb 400(pc3200) which I just realized is 2.75 volts and the specifications for my mobo say 2.5 only. Will I have problems? Thanks for your help. Chris

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  • cchrisgates Sep 11, 2008

    This is great. My current sdrams (CMX 512 3200LLPRO) I think prefer a higher voltage I'm going to try it our while I wait for my new one to arrive. I've been plagued by the BSOD and this may be a possible reason. Thanks, Chris

  • cchrisgates Sep 11, 2008

    O.K. umm I'm not a master overclocker guy. So you lost about the fifth word in. I had the CMX on my gigbyte board that went out and I replaced it with the intel. So I just used the memory I already had. I think I might have gone a little too aggressive with the corsair xms 2gb (2x1gb). Which setting should I back down; Mem refresh cycle time, R/W Delay, or R/W timing? Current 12,2,6. Thanks again, Chris

  • cchrisgates Sep 12, 2008

    I had the Gigabyte board but then it took a dump on me and I replaced it with the Intel D875PBZ. Thee manual states 2.5v (only)but I think that's because the bios did not support hanging that before. The new bios does and gives options like 2.5, 2.67, 2.75 or something like that. I bought the Corsair XMS 2gb (2x1gb) from new egg and on the web site you puncc in your board and it gives you a list of ram. So I bought it but I cannot find on Intels web site a list of approved ram. I think it will be fine but if I open the package and it does not work I gotta sell the ram on ebay and hope to recover some money. The ram will not be here until Sat or Sun so I have time to research. My processor is Pent 4 3.2 Hyperthreading 800mhz 478. Thanks for all your help, Chris

  • cchrisgates Sep 12, 2008

    Thanks for all the info. I'll post when I get the new ram up and running.I just noticed, after running a benchmark program, that the two rams I have currently are not exactly the same. They have slight differences in the name extensions. Consequently they are runnung at different latencies, one slower than the other. Could this be slowing my system down or causing some BSOD problems I experience from time to time? If you have any thoughts please post, thanks

  • cchrisgates Sep 13, 2008

    I installed my new ram and she runnin beautifully. I'm taking baby steps but theres no problems and it been running for about 24 hrs. I've done minor video work, music, and dvd burning. Thanks for all your feedback. I'll checkout those websites you recomended and start puttin the pedal to the metal. Thanks again, Chris


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When you startup and access the bios setup screens you should be able to nudge the voltage of the Ram to 2.75.

I have a similar board as this on one of my PCs and have the same ram as you installed. I had to massage the bios setup for the Ram to get that PC to boot. I changed the voltage and refresh timings especially the last one to a value of 15.

Let me know how you make out.


Posted on Sep 10, 2008

  • 3 more comments 
  • Glenn Rogers
    Glenn Rogers Sep 11, 2008

    If you have any spread spectrums active turn those off and back down your CPU clock a hair. I know the spread spectrum is the demise of any over clocking, So, I suggest you back down the CPU clock and slow down the memory timings and you should get away with it. The CMX Pro from Corsair was built to deal with these problems. But, having RAM modules on the recommended list for your board maker is critical and one RAM chip over another maker can make the world of difference. Mine is an Asus designed for an AMD CPU so this is the only difference.

    Let me know how you make out.


  • Glenn Rogers
    Glenn Rogers Sep 11, 2008

    If you can apply across the board settings by choosing categorically, Normal, Optimal, Agreesive and Expert; I would apply Optimal.

    I have and have used Gigabyte boards and I have a love hate relationship with them. I prefer Asus simply because of their no questions asked RMA policy and yes there are times when motherboards are shipped DOA; or have early fatigue failures.

    Now, the memory timings vary from board to board but generally they don't go up and down across the chip. Usually, these are consistent. I.e., 2,2,10. To set conservatively I would suggest 5,5,5 12 or even 15.

    Spread Spectrum was a technology to correct electrical noise that interfers with some devices on a board. Rather than being helpful. The technology has failed miserably since it was rolled out, although there are a few environments where its nice to have, but a home or office environment is not one of them.

    What RAM do you have ordered? And, is this in the approved list of vendors and part numbers at Gigabyte?


  • Glenn Rogers
    Glenn Rogers Sep 12, 2008

    If you used a Memory Selector you should be fine. Just so you know, you can buy Corsair Memory from Corsair.

    I also like to buy Crucial ram because of the same reasons, life time warranty, no questions on returns. They make the ram for Micron branded which is the ram of choice for the Defense Department and Govt. Agencies (same reasons). Their Crucial branded is the same ram without the redundancies of the other, such as buffered and asynchronous.

    My new gaming rig has a dual core running at 2.5GHz with a meg of L2 on each core and I have Crucial ram in that one and it runs Windows X64. Its wicked fast and I can be playing Doom 4 and burrning a DVD that has ten episodes of Perry Mason or 1955 Gunsmoke for example. The board never coughs under those conditions. As to AMD vs Intel on the Dual Core, its now a toss up. But, the build to have is a quad core and I like the Phenom CPU. So thats my next build. I just buy parts one at a time and save the CPU for last and then the RAM. I have a laptop with Vista that took me four days to make useable, but as a tech I had to have Vista on something so I could troubleshoot problems people like you get and have eventually. I don't reccommend it at all. I'm on the early input community for Windows 7 and MS is pretty serious about not having another 7 billion dollar mistake on their hands. Most of us want MS to make selectable serveral profiles for the OS during install, so you can profile the OS for gaming, accounting, surfing, etc.

    Keep me informed if you wouldn't mind on how you make out. Any information I can get from real users is priceless to me/us for our own internal Knowledge base.

    Good luck on your Ram arriving as spec'd, but as you stated your bios update makes it overclockable so have fun with that.

    Two good sites to get into forums is and (for great ontopofit information that's not influenced by Ad Placement and its forum I worked in their Free Clinic for years until it got tiresome.

    Cheers, Mate

  • Glenn Rogers
    Glenn Rogers Sep 13, 2008

    So long as you use the Expert Mode (or another that gives you full control over the settings for the RAM) in Bios Setup pages where you can tweak the ram timing and set these timings to be all the same vs using the SPD chip you will be fine. With that ram on an Asus AMD board and with a nvidia northbridge chipset, I used 5,5,5,15 and that settled the RAM down so it was happy. I wasn't though. I'll be replacing the board out of my gaming rig and put it in another PC build I'll use as a loaner when I have a customers PC in the shop for well over a week awaiting parts etc. I could easily do what you are doing and replace the RAM, which is an option. The board I have has a GFX PCIe onboard video display adapter, a PCIe slot, and I currently have a PCI Display Adapter a MX400. I'm using that display adapter until I get hold of a DX10.3 PCIe Card in the Nvidia 8800 GTX flavor for a decent price. Ultimately, I want to have three LCD panels running at the same time for working on up to four PCs on my bench as the same time. I've been doing this with a KVM switch for several years now and it is convenient to have this setup with everything networked together.

    I encourage you to utilize the MaximumPC forums. These people are much like FixYa, but not such a wide range of experience. The MaxPC forums are for hard core power users. I use to gain feedback on systems and parts that are more suitable than others for overclockers.


  • Glenn Rogers
    Glenn Rogers Sep 15, 2008

    I'd do a goggle search for Hiren's BootCD. You can download this as an ISO file and burn it to a CD using Nero Burning ROM. Then insert into your primary CD/DVD drive tray and bootup. You'll get a prompt to boot from the Hard Drive or the BootCD. Boot to the CD and you'll see some testing programs which will help you find the comfort zone for your minor overclocking attempts. Just be aware that the best over clockers only step up a notch or two before you're BSOD to death.

    The trick is in the North bridge's ability to handle the timings of the CPU to the RAM so there's no bumping and banging of data bits, which give you the BSOD. BTW, the error codes in these screens are of little to no use and are best ignored.


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