Does Mac Pro 4,1/5,1 support "buffered/registered" ECC memory?

As the spec said, Mac Pro 4,1 & 5,1 use ECC unbuffered memory, but I really do want to know if "buffered/registered" ECC RAM will work on Mac Pro 5,1 with no problem?
I know "Unbuffered and Fully-Buffered" memory are 2 totally different stuff, and cannot use with the other side.
But what about "buffered/registered" memory? Could it use under "unbuffered" mother board like MacPro 4,1 & 5,1? If so, can they mix with others?
I've google and search around the internet but still didn't find the answer...

Mr. Bennet-Alder:
I think you are confusing DDR3 and DDR2 type of memory modules.
DDR2 PC2-8500 were the FBDIMMs that were used in the 2.1 and 3.1 Mac Pro versions (before 2009).
These were 800Mhz or 600Mhz versions. They used serial data channels from one DIMM to the next so the DIMMs had to be clocked very quickly to achieve speeds. Thus, the need for the fully buffered DIMM to pass the data from one DIMM to the next.   Because they were clocked so quickly, they had to have heat sinks to bring the temperature down to the lower fan speeds Apple wanted to use.   The heat sinks kept prices high. So did the fact that few servers adopted the FBDIMM technology.   These also had ECC.
DDR3 PC3-10600 and DDR3 PC3-8500 were used in later MAC Pros, version 5.1 and 4.1 respectively.
PC3-10600 is a 1333Mhz DIMM.   PC3-8500 is a 1066Mhz DIMM.
Both of these are using ECC bits. Thus, there are actually 9 parallel data bits, one of which is for ECC.
Registered/buffered and Unregistered/unbuffered have a different meaning than FBDIMM.
It is better to use the Registered/Unregistered terminology to avoid confusion with FBDIMMs.
Registered DIMMs are sometimes referred to as RDIMMs and Unregistered DIMMs as UDIMMs.
Also one may see an R on the end of the PC3-8500 designation as in PC3-8500R to designate registered memory.
One thing that is for sure, the memory controller in the CPUs has to have uniform memory in the slots for each given processor.   That is, you cannot mix registered memory in one slot with unregistered memory in another slot for the same processor. Apple indicates the computer will not boot in this case. This is because the signal timing differs to each and the memory controller in the CPU is only a homogeneous type.
Apple indicates that registered DIMMs are supported by Mac Pro version 5.1 - 2010 models.
They have not provided the same indication for Mac Pro version 4.1 - 2009 models.
WIth that said, firmware on version 4.1 macs may be able to be upgraded to support RDIMMs.
I suppose this updates the timing issue to suppor the RDIMMs.
Why is this significant -
Used registered DIMMs with ECC are easier to come by due to people upgrading their server computer to more denser memory capacity in the same slot.
Used unregistered DIMMs with ECC are harder to come by.
Accordingly, used registered DIMMs are less expensive on ebay.
My 2 cents.

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I doubted there was anything to be done about the internal graphics, that's why I neglected to give other details.
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Does mac pro need an anti virus or not? please advise thanks

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1. This comment applies to malicious software ("malware") that's installed unwittingly by the victim of a network attack. It does not apply to software, such as keystroke loggers, that may be installed deliberately by an intruder who has hands-on access to the victim's computer. That threat is in a different category, and there's no easy way to defend against it. If you have reason to suspect that you're the target of such an attack, you need expert help.
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The following caveats apply to XProtect:
It can be bypassed by some third-party networking software, such as BitTorrent clients and Java applets (see below.)
It only applies to software downloaded from the network. Software installed from a CD or other media is not checked.
3. Starting with OS X 10.7.5, there has been another layer of built-in malware protection, designated "Gatekeeper" by Apple. By default, applications and Installer packages downloaded from the network will only run if they're digitally signed by a developer with a certificate issued by Apple. Software certified in this way hasn't actually been tested by Apple (unless it comes from the Mac App Store), but you can be reasonably sure that it hasn't been modified by anyone other than the developer. His identity is known to Apple, so he could be held legally responsible if he distributed malware. For most practical purposes, applications recognized by Gatekeeper as signed can be considered safe.
Gatekeeper has, however, the same limitations as XProtect, and in addition the following:
It can easily be disabled or overridden by the user.
A malware attacker could get control of a code-signing certificate under false pretenses, or could find some other way to evade Apple's controls.
For more information about Gatekeeper, see this Apple Support article.
4. Beyond XProtect and Gatekeeper, there’s no benefit, in most cases, from any other automated protection against malware. The first and best line of defense is always your own intelligence. All known malware circulating on the Internet that affects a fully-updated installation of OS X 10.6 or later takes the form of so-called "trojan horses," which can only have an effect if the victim is duped into running them. The threat therefore amounts to a battle of wits between you and the malware attacker. If you're smarter than he thinks you are, you'll win.
That means, in practice, that you never use software that comes from an untrustworthy source. How do you know whether a source is trustworthy?
Any website that prompts you to install a “codec,” “plug-in,” "player," "extractor," or “certificate” that comes from that same site, or an unknown one, is untrustworthy.
A web operator who tells you that you have a “virus,” or that anything else is wrong with your computer, or that you have won a prize in a contest you never entered, is trying to commit a crime with you as the victim. (Some reputable websites did legitimately warn visitors who were infected with the "DNSChanger" malware. That exception to this rule no longer applies.)
Pirated copies or "cracks" of commercial software, no matter where they come from, are unsafe.
Software of any kind downloaded from a BitTorrent or from a Usenet binary newsgroup is unsafe.
Software with a corporate brand, such as Adobe Flash Player, must be downloaded directly from the developer’s website. If it comes from any other source, it's unsafe.
5. Java on the Web (not to be confused with JavaScript, to which it's not related, despite the similarity of the names) is a weak point in the security of any system. Java is, among other things, a platform for running complex applications in a web page, on the client. That was never a good idea, and Java's developers have had a lot of trouble implementing it without also creating a portal for malware to enter. Past Java exploits are the closest thing there has ever been to a Windows-style "virus" affecting OS X. Merely loading a page with malicious Java content could be harmful. Fortunately, Java on the Web is mostly extinct. Only a few outmoded sites still use it. Try to hasten the process of extinction by avoiding those sites, if you have a choice.
Java is not included in OS X 10.7 and later. Discrete Java installers are distributed by Apple and by Oracle (the developer of Java.) Don't use either one unless you need it. Most people don't. If Java is installed, disable it — not JavaScript — in your browsers. In Safari, this is done by unchecking the box marked Enable Java in the Security tab of the preferences dialog.
Regardless of version, experience has shown that Java on the Web can't be trusted. If you must use a Java applet for a specific task, enable Java only when needed for the task and disable it immediately when done. Close all other browser windows and tabs, and don't visit any other sites while Java is active. Never enable Java on a public web page that carries third-party advertising. Use it only on well-known, password-protected, secure websites without ads. In Safari 6 or later, you'll see a lock icon in the address bar with the abbreviation "https" when visiting a secure site.
Follow these guidelines, and you’ll be practically as safe from malware as you can be.
6. Never install any commercial "anti-virus" or "Internet security" products for the Mac, as they all do more harm than good, if they do any good at all. If you need to be able to detect Windows malware in your files, use the free software ClamXav — nothing else.
Why shouldn't you use commercial "anti-virus" products?
Their design is predicated on the nonexistent threat that malware may be injected at any time, anywhere in the file system. Malware is downloaded from the network; it doesn't materialize from nowhere.
In order to meet that nonexistent threat, the software modifies or duplicates low-level functions of the operating system, which is a waste of resources and a common cause of instability, bugs, and poor performance.
By modifying the operating system, the software itself may create weaknesses that could be exploited by malware attackers.
7. ClamXav doesn't have these drawbacks. That doesn't mean it's entirely safe. It may report email messages that have "phishing" links in the body, or Windows malware in attachments, as infected files, and offer to delete or move them. Doing so will corrupt the Mail database. The messages should be deleted from within the Mail application.
ClamXav is not needed, and should not be relied upon, for protection against OS X malware. It's useful only for detecting Windows malware. Windows malware can't harm you directly (unless, of course, you use Windows.) Just don't pass it on to anyone else.
A Windows malware attachment in email is usually easy to recognize. The file name will often be targeted at people who aren't very bright; for example:
♥♥♥♥♥♥♥♥♥♥♥♥♥♥!!!!!!!H0TBABEZ4U!!!!!!!.AVI♥♥♥♥♥♥♥♥♥♥♥♥♥♥.exe
ClamXav may be able to tell you which particular virus or trojan it is, but do you care? In practice, there's seldom a reason to use ClamXav unless a network administrator requires you to run an anti-virus application.
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9. It seems to be a common belief that the built-in Application Firewall acts as a barrier to infection, or prevents malware from functioning. It does neither. It blocks inbound connections to certain network services you're running, such as file sharing. It's disabled by default and you should leave it that way if you're behind a router on a private home or office network. Activate it only when you're on an untrusted network, for instance a public Wi-Fi hotspot, where you don't want to provide services. Disable any services you don't use in the Sharing preference pane. All are disabled by default.

Unable to mount disks: why does Mac Pro think it is NTFS?

We have a 2006 and a 2008 Mac Pro. Each has four internal disk drives. The 2008 one has disk 1 & 2 concatenated as the boot drive and 3 & 4 concatenated as the backup drive. Super Duper was used to make an image backup. Right before we moved, the disk started clicking. Now it doesn't boot.
First I tried the secret keypress at boot time to switch boot disks to the other one with no luck. Then I said to myself, why not just mount the disk using the boot drive from the other mac? So I did. It doesn't mount!
Disk Utility shows the two drives in the bay as "RAID slice" and "disk2". I know they are all HFS+ Mac disks. Why is the error message think it is NTFS?
As confusing as the error message is, any ideas on how I can get the files off this disk? I'm thinking my next try should be Disk Warrior or something like that?
Disk Utility:
Verify and Repair volume “disk2”
** /usr/local/bin/ntfsfix has been disabled because of volume corruption issues.
** If you still want to try fixing your volume, use /usr/local/bin/ntfsfix from the command line...
Error: Filesystem verify or repair failed.
Mac OS X 10.5.8--the 2008 mac has the server version.
We all think the boss should buy us all new Mac Pros with SSDs.

No need to put down $$$ for new, but it is over due time to upgrade to Lion or later, and an SSD is a cheap way to get a huge improvement.
10.5.8 is not being supported. 106.8 still is.
500GB SSD is more than enough for system, 250GB should be fine, prices are $250 and $140 range, and $12 for a sled adapter.
I would not use those drives as concatenated, not for system or backup. And I would not keep data and system on the same volume. One you undo and redo and get more current storage and probably RAM and newer OS you should be fine, a new GPU probably, but all of that is cheaper and doable.
Amazon has FBDIMMs in the $25 2 x 2GB set for 2006-2008, and 16GB makes a nice base system.

How does Mac Pro compare to iMac?

Ok I'm Pisssed!
I just bought a mac pro with AMD FirePro D700 6144 MB to photo editing. I noticed that it's a bit sluggish with my 4k Dell monitor. I figured what I can do I already have the best mac there is guess I'll have to live with it.
And then BAM, the new iMac comes out with AMD Radeon R9 M295X. Will it perform better with photo editing?

Actually you are wrong.
You can change CPU in mac pro, but you cannot fit inside anything better or newer as you are limited to specific TDP and chipset. For instance, putting in new generation of xeon won't give you TB3 support and so on. It can also lead to instability of the system overall. So in basic words: you shouldn't change CPU you already have inside so no CPU upgrade there as well.
Also iMac is much better in single core performance than mac pro and 99% of applications don't use more than 2 cores and even if they do those actions are not so critical (rendering where you can wait or go get one coffee meantime,...) compared to for instance 3D modelling or animation, where you need smooth rendering and good CPU real-time computation.
Also new radeon R9 M290X and M295X is much better supported from AMD side and also in windows. We all know OS X 3D performance is miserable compared to windows and having one year old drivers for mac pro GPU's (13.25 version) compared to newest radeon drivers (14.9).
In addition to all, 4K monitors are very poorly supported on mac pro. For example sometimes when I start OS X half of the screen remains black on my dell UP2414Q and only solution is to restart my computer again. Dell says that they haven't tested with apple hardware and it should be apple to fix this while apple says dell should fix it while customers remain in the dark and with poor support. Thank you dell and apple.
And there is more bad news for apple: adobe has started to shift their support to nvidia and windows system as Illustrator CC2014.2 now supports hardware accelerated graphics rendering with nvidia GPU on windows! And even more, new GTX980 beats any AMD cards on the market and AMD probably won't make anything better because they can't. I never understood apple latest fascination with AMD. AMD is the worst company for GPU's and their support is so bad I'm considering selling my mac pro.
The release of new iMac with 5K was a big slap in the face of professional apple customers who paid big money for their pro machine which can only run final cut pro X in it's full power. Any other software is unable to utilize all that "power" that apple put into mac pro. It's a big shame and a good waste of money to have just a nice room warmer.
Instead of fixing old things apple went and made new version of consumer class PC that is better or at least equivalent to pro class PC's the sell.
What apple need to fix is:
-10-bit support for displays. I don't know why we throw so much money on good displays when computer only outputs 8bit at the end.
-drop AMD and pick up nvidia cards. Apple already supports openCL 1.2 with nvidia cards under OS X and nvidia offers physX and CUDA in addition to only openCL that AMD offers. Also nvidia drivers are much more stable and performance of nvidia cards is better in all aspects.
-give more support to developers like adobe and others to upgrade their software to take advantage of GPU's we throw so much money on. What good is it to have a good computer and then software that can't even use that computer in it full potential except only few operations while majority of operations are still slow and laggy.
-give better support for 3D under OS X. Right now I'm watching like 9-30 FPS in Maya and Unity, and sometimes I even run some games to free my mind. WoW hardly reaches 60FPS on low settings while under windows bootcamp on same hardware I can get easily 60FPS! OS X still only has openGL 4.1, while we have there 4.3 and 4.4 GPU's out.
There has been almost one year since the release of this mac pro and nothing pretty much changed. This "pro" computer is actually pretty slow compared to what competition offers and the only good thing on mac is now the friendliness of OS X, stability and good integration with everything which windows lacks. But overall it's a very slow system to work on. Apple promised much but we got nothing of it except high price tag and a lot of lost nerves!
I'm very very disappointed in apple right now and really considering switching back to normal PC where at least I get latest drivers for everything and things at least runs at normal frame rate I can work with.
And don't even let me start on new Yosemite "flat" look which they obviously copied from windows and it is ugly as ****. Instead of changing icons they should fix old mac problems and give us professionals more to work with. In reality we get slapped and pushed on the edge. Don't try and make professional multimedia computer if you can't support it!

Does Mac Pro come with connecting cables for your add-on SATA drives?

I am buying some Western Digital OEM SATA drives to put in my Mac Pro that I just purchased and is being shipped to me. I realize that OEM drives do not have any connecting cables/hardware. I assume that Mac Pro does have the necessary connecting SATA cables and hardware to attach the drive to the sleds? Or do I have to purchase them separately?
Thanks,
John

Nobody does it better than Apple. For years I was always struggling with cables and hard disk setups and I knew as soon as larger hard drives were available I'd want to replace my 500Gig ones. Once the 750Gig came out I ordered four then found a quick hard drive install video that showed you how to pull out the tray, remove the old drive, insert the new drive and push the tray back in.
It was that easy. Mac machines are so cool.
Tim...
3Ghz Mac Pro w/8GRam, 3TerabytesHD, 2 SupDrives; 13" BlackBook; 80Gig Vid-iPod Mac OS X (10.4.9) 30" Cinema, HPColorLJ Printer, LaCie 600Gig External & LaCie DVDRW/CDRW Drives

Does Mac Pro 4,1/5,1 support "buffered/registered" ECC memory?

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