Can I Use DDR2-533 (PC2 4200) ?

2x Kingston HyperX 2GB KHX4200S2LL/2G DDR2-5300 (PC2 4200)

Kappy wrote:
PC2-4200 RAM is not PC2-5300 RAM. The former is DDR2 533 MHz and the latter is DDR2 667 MHz. You cannot use the former if your computer requires the latter. Your model requires DDR2 667 MHz PC2-5300 RAM, not PC2-4200.
Actually it should work but with what should be an obvious performance penalty. I've tried it (used PC2-4200) myself on my late 2007 model when I was bored and had access to some PC2-4200 modules from another computer that was upgraded. I've read the Intel chipset datasheets, and they've always had backwards compatibility in mind. The MacBook4,1 designation is for the last of the Intel chipsets. I'd also take a wild guess that the NVIDIA chipset versions might work with PC2-4200, although it's been reported that they work with PC2-6400.
If PC2-5300 is mixed with PC2-4200, it should read as DDR2 533 in system profiler. The default when speeds are mixed is to run both at the same speed. I tried all sorts of combinations including 2 GB (PC2-5300) + 512 MB (PC2-4200), 2x512MB PC2-4200, 512 MB (PC2-4200) + 512 MB (PC2-5300).
Apple doesn't exactly tout this as a feature, but in my experience it will work. It's not an ideal solution and frankly I wouldn't go out of my way to get PC2-4200. However - I've tried it myself out of curiosity and found that it did work - at least in my machine.

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Is it possible to use ddr2-533 memory in Satellite M40-101 ?

now in my notebook is installed 512Mb ddr pc2700. i want to upgrade to 1Gb. is it possible to use ddr2-533 in this notebook?

i didn't write that i will use different modules. i just asked if it is possible to use ddr2-533 in this notebook.
why did you write only these three ? i found much more in the specs:
1024MB (1GB) Memory PC2700 DDR SODIMM (333MHz) PA3313U-2M1G
1GB PC2-4300 DDR2 Memory PA3411U-2M1G
1GB PC2-4300 DDR2 Memory PA3411S-2M1G
256 MB PC2-4300 DDR2 Memory PA3389U-2M25
256 MB PC2-4300 DDR2 Memory PA3389S-2M25
256MB Memory PC2700 DDR SODIMM (333MHz) PA3311U-2M25
512 MB Memory Expansion PA3312U-1M51
512 MB Memory PC2700 DDR SODIMM (333MHz) PA3312U-2M51
512 MB Memory PC2700 DDR SODIMM (333MHz) PA3312S-2M51
512 MB PC2-4300 DDR2 Memory PA3412U-2M51
512 MB PC2-4300 DDR2 Memory PA3412S-2M51
So as i understand i can use ddr2-533 in m40-101 ?

Can I use DDR2/667 ram in a machine wants DDR2/533 ram?

I searched all over these forums, googled my eyes out, read the dev note for my machine and could not find a definitive answer...
The scenario is this: I have a PowerMac G5 (Late 2005) M9590LL/A, that is spec'd for DDR2/533 or PC2-4200.
I have a friend who just bought a 24" Intel iMac and upgraded the ram to 2 GB, thus he has 2 pieces of 512 mb DDR2/667 that are unused.
He will sell them to me at a very good price. Will they work in my machine? Can you use FASTER ram and will it clock down to the proper speed in a machine that is looking for slower ram?
Right now in almost all places online the DDR2/533 chips are MORE expensive than the DDR2/667 chips.
Right now my machine still has the stock of 512 mb of DDR2/533 ram (2 pieces of 256 mb).
Another friend told me to just put the chips in and see if they will work, I do not want to do this if there is some minor voltage difference that will either damage the motherboard or the DDR2/667 chips or both.
I know in the PeeCee world, you can use PC133 ram in systems that need PC100, and DDR/333 ram in systems that need DDR/266, and likewise DDR/400 in systems that are looking for DDR/333, but I remember reading that DDR2 ram is more sensitive to BUS speed and voltage than DDR(1) ram.
Any ideas?
Please help me :>
Thanks!
Dual-Core 2.0 ghz -M9590LL/A Mac OS X (10.4.8)

Welcome to Apple Discussions!
Even if you found a similar form factor module with a
higher spec than Apple's official, I would not put it
in the machine. Mac OS X can be very particular
about the kind of RAM that is installed, and panic if
the wrong kind is installed, or cause problems such
as unexpectedly quitting applications. Follow the
specs to the letter. See my FAQ:
http://www.macmaps.com/Macosxspeed.html#RAM
So you are basically saying that higher-clocked ram will not spec down to run slower?
Thanks for the info. I will give a good read to the link here to your FAQ.
:>

Can I use DDR2 800 with Normal Athlon 64 (no X2) on K9NU NEO m/b ?

In manual saying that " Memory Support**DDR II 400 / 533 / 667 / 800 (DDRII 800 is only for Athlon 64 X2)"
Currently;, I have DDRII 800 with Alhlon 3000+ 64 (1 core)
The doubt is. If I'd like to use DDRII 800 with this normal Athlon 3000+64(not x 2) Will be any probelm happen ?

Currently;, I have DDRII 800 with Alhlon 3000+ 64 (1 core)
The doubt is. If I'd like to use DDRII 800 with this normal Athlon 3000+64(not x 2) Will be any probelm happen ?
I know what you're asking in the last question but this post makes no sense considering what you said. (what I highlighted in green)
My question is are you using it now or not?

Can I use DDR2 in my Powermac g5 2.5 Dual?

I have a Powermace G5 2.5 Dual It is the first generation of the 2.5 that came out and seems to have come with 2 sticks of 256mb DDR Ram. I have a pile of DDR2 5300 ram and was wondering if these ram sticks will work in my computer. Thanks in advance.

Hello! Look at THIS article. Looks like it's pc3200. Tom

Santa Rosa MacBook - PC2-4200/DDR2 533 works

Checked it out myself. I read the Intel PM965/GM965 (Santa Rosa) spec, which says both "667 and 533 MHz" DDR2 memory is supported, and that if memory speed is mixed in separate slots that it will revert to the slower speed. I know Apple only recommends PC2-5300, but I thought I'd report back my experiment.
I tried it out myself with one 512 MB Hynix PC2-5300 module (factory installed in my MacBook) along with a 512 MB Samsung PC2-4200 module (from a PC notebook), and System Profiler identifies both modules as DDR2 533MHz.
I used to also believe that for true "dual channel" operation, you would as much as possible to be identical. The Santa Rosa datasheet says that only capacity is critical for full dual-channel operation, and that partial dual-channel operation is possible if the modules aren't matched for size. Also - dual-channel apparently doesn't mean full parallel operation, but that they can be "interleaved" such that one channel can be accessed (read or write requested) in advance while the other channel is still accepting/outputting data - sort of pipelining read or write requests. It's not exactly the same as having a full 128-bit memory bus, which is what I used to think was the case.
I'm not sure if this holds true for the previous generation of MacBooks, but I wouldn't be surprised if it were.

Hyde244 wrote:
So basically as long as it is all at the same bus speed, different RAM brands can be interchanged without any effect?
That's my impression from reading the Intel datasheet.

I have an IMac4,1 intel Core Duo 1.83 GHz 667 MHz purchased in Feb. 2006. Can I use 4GB (2x2GB) 200-Pin DDR2 SO-DIMM DDR2 667 (PC2 5300) Laptop memory

I have an IMac4,1 Intel Duo 1.83 GHz 667 MHz (Bus.) purchased in February 2006. Can I upgrade my memory with 4GB (2x2GB) 200-Pin DDR2
SO-DIMM DDR2 667 (PC2 5300) Laptop memory?

That memory specification is correct, but the maximum memory configuration for your iMac is 2 GB.
iMac: Memory specifications and upgrades

[915 Series] 915G-Combo with OCZ-DDR2-533/4200 no post - help!

I was hoping one of you wonderful experts on this board might be able to help. I just bought a pair of OCZ DDR2-RAM and am having trouble getting the system to recognize it. Here are the specs:
RAM specs:
- 533MHz DDR2, unbuffered CL 3-3-3-8
- 1GB (2X512) dual channel optimized gold kit
- 1.8V 240pin DIMM
- 2.2V EVP - OCZ's unique Extended Voltage Protection feature allows PC2-4200 modules to handle voltages up to 2.2V ±5%
- OCZ part number:-OCZ25331024ELDCGE-K
System specs:
* CPU model and rated speed:-Intel Socket775 2.8GHzE
* Not Overclocked
* Motherboard and revision:-MSI 915G-combo
* Motherboard Bios rev:-1.7 (latest)
* Video card:-ATI X800XL
* Power supply:-450W
* Operating System:-XP Pro SP2
My current Crucial DDR-400 PC3200 CT6464Z40B 2x512MB RAM runs without problems installed. When I switched out the Crucial RAM and installed the OCZ DDR2-533 PC4200 RAM in the appropriate DDR2 slots (1 and 3), no go. The system won't even post and I can't get into the BIOS. I tried using even just one of the 512MB sticks, alternated sticks, and even tried just one stick in DDR2 in slot3 instead of slot1 - no go. My boot drives don't get accessed either as I had even placed a Memtest bootdisk in the floppy hoping it might be able to access that.
I've been working over the last 24hrs with the very helpful OCZ folks but we havn't been able to get anywhere. I realize that OCZ isn't technically on the 'tested and verified' DDR2-list for the 915G-combo board, but OCZ is a good name brand (up there with Crucial) and I went for the higher-end Gold-series (CAS3) so I figured it wouldn't be a problem.
I've tried clearing the CMOS (no effect except to wipe out my bios settings). I have a D-Bracket2 installed and it hangs when the upper right light is green with the rest red (according to the D-bracket guide, that means 'Memory Detection Test - will hang if the memory module is damaged or not installed properly'. I can't imagine the RAM is bad - I have 2 matching ones to test (neither seem to work when installed by itself), and just got it brand new from Monarchcomputers yesterday evening in their retail box unopened.
Per OCZ's advice, I was unable to manually set a CAS of 4 with my Crucial DDR installed (I could only manually set it to a max of 3), so I also test-tried a manual set of the BIOS memory timing to 3-4-4-10 while the Crucial DDR RAM was installed and then retried the system with only the new DDR2 installed in their appropriate slots (Crucial DDR of course removed). Still no luck - the system won't get to bios and hangs at the Memory Test per D-Bracket2. It won't even get to a point where it tries to access/boot from floppy so that I can't run MemoryTest from disk.
Would anyone else out there recommend trying something else, short of going out and shelling out $140 for an ABit AA8-925X mboard that OCZ actually lists as compatible with their RAM? My MSI 915G-Combo board has been flawless for me up to now and I'd hate to part with it just because it won't work with good OCZ DDR2 ram. One thing I havn't tried is attempting to use an older BIOS version - I had flashed to the latest v1.7 bios prior to installing the DDR2 ram, so I've never actually tried any of the older versions. Does anyone think this would be worth a shot?
Cheers
- James

Thanks... I tried that.... still no go...
I just got an email from OCZ techsupport (they had requested that I email them directly).
"we have identified a problem with the PC4200 Gold DDR2 dimms, we need to get you a pair with reprogrammed SPD info on them. So we need to swap your kit out"
They were very apologetic about it, and from what I can tell I don't think this happens a lot with OCZ ram...
So that hopefully will be the solution to my problem.. I'm processing an RMA with them right now.. will let you know how it goes.. it's a 'relief' to find out that it most likely isn't my MSI-915G board's fault after all...
Kudos to OCZ at least for getting back to me so quickly, even though it does suck to have my memory delayed again.. I'll post again when I get the replacement RAM and let you all know how it goes... at least they've identified a problem and are willing to take care of it rather than leaving me hanging...

Help -PC2-4200 DDR2 SDRAM in a 1.33GHz ? (RAM compatability)

Hello all -
I'm planning on purchasing a new 15" PowerBook. I'd like to use the 512MB chip out of this machine in my older 1.33GHz 12" PowerBook.
Can a PC2-4200 SDRAM chip be put in a machine that was originally spec'ed to hold PC2700 SDRAM chips?
Thanks!

DDR2 is not compatible with systems designed for DDR memory. It will work for the most recently introduced PB's just a few days ago, that is, if the DDR2 is on a notebook memory stick and speced to work with the Apple PB.

Can I use ddr3 memory in a macbook runing ddr2 memory

I have a macbook pro running 1067 Mhz DDR3 4GB and just updated to 8GB. Can I use the old DDR3 4GB in my old macbook which runns DDR2 memmory?
Any advise would be great.
Thanks

No. They won't fit.
(61220)

I have a mac OS x version 10.4.11 2 GHz Intel Core 2 Duo 1 GB 667 MHz DDR2 SDRAm. Can I use Crucial 2 x 1 GB 667 MHz DDR2 SDRAN to upgrade memory?

I have a mac OS x version 10.4.11 2 GHz Intel Core 2 Duo 1 GB 667 MHz DDR2 SDRAm. Can I use Crucial 2 x 1 GB 667 MHz DDR2 SDRAN to upgrade memory?

The downloads are probably .dmg files (disk images). You would open the disk image (double-click it) to find the application or an installer. If it's the application itself, you then drag the application to your Applications folder to "install" it. If it's an installer, double-click the installer to run the installer that installs the application.
NOTE: If you iMac is Intel, it's not a PPC G5.

Do you have to use the Apple RAM with the heatsink? Or can you use any 667 MGz DDR2 RAM?

I'm sprucing up my MacPro 2 x 2.66 GHz (hard drives, video card, & RAM) and would like to know if I have to use Apple's RAM with the heatsink on it.
Meaning, the RAM I end up purchasing, does it HAVE to have the heat sink on it? Or can I use any regular DDR2 667 MHz dimms?
I've been asking/researching and am getting mixed answers.
Thanks for the help!

You MUST use RAM with both the large Apple-specified Heatsink AND the Apple approved Temperature Sensor. These are "tuned" to the airflow inside a Mac Pro. Modules must also be ECC modules, 72 data bits wide.
If you decide not to, the internal fans may not work properly, the modules will get too hot and will fail prematurely
The best way to solve this pronlem is to deal with a Vendor that knows Macs and can tell YOU which modules work in your Mac -- guaranteed or your money back if it does not work for any reason. And a lifetime warranty -- if it ever fails and still has their sticker on it, they will replace it, free.
There are a few one-off deals out there that may be a little cheaper, but the cost of dealing with reputable Mac-oriented Vendors does not add substantially to the price. And you do not get stuck with "you buy it, you own it" modules that do not work in your Mac.

Can i use 533 ram ??

can i use 533 ram with my board : msi 865pe pls ??????????

Most suitable PSUs for any system will be like Antec TruePower 480w, Enermax Noisetakers 470w, Enermax 465watts, PowerPC 550watts, OCZ 550watts etc.
Like I said, 533MHz RAMs are meant for o/c'ing so there'll be no official statement that it'll be 100% supported as the highest stable for a FSB 800MHz CPU is DDR 400MHz RAMs which are reconisged by Intel and anything higher than that is considered for o/c'ing purposes.
If you die die wants to buy the DDR 533s, I recommend Kingston or Geil Golden Dragon series. You may want to check out what other users are using for their RAMs vs Mobos.

Can I use extra MBP RAM in a G5?

I haev an extra 512MB PC2-5300 DDR2 module left over from my Intel MacBook Pro.
Can I install it in a friend's G5 iMac?
I know the specs are different but I thought if it is faster/better it would work.

The RAM you mentioned will only fit an iSight G5 iMac.
Rev A -
iMac G5
2 GB PC3200 (400)
unbuffered DDR,
184-pin 64 MB
DDR
SDRAM 2
iMac G5 (Ambient Light Sensor)
2 GB PC3200 (400)
unbuffered DDR,
184-pin 128 MB
DDR
SDRAM 2
iSight:
1. PC2-4200
2. unbuffered
3. nonparity
4. 240-pin
5. 533 MHz

Can I use faster memory in Mid-2007 iMac?

I currently have factory spec (1 GB) memory in my 20" (Mid-2007) iMac. Specs for memory in this machine say I need pc2-5300, unbuffered, non-parity, 200-pin, 667MHz DDR2 SDRAM. I noticed my hardware has an 800 Mhz bus.
1) Can I use 800 Mhz RAM that is otherwise the same spec?
2) How important is CAS Latency (e.g., the installed memory is spec'd as CL=5, the 800 Mhz RAM all seems to be CL=6)?
Any help is greatly appreciated!

I totally agree with lenn5! Many folks here in the forum have reported all sorts of problems, everything from kernal panics to won't even boot when they installed the 800MHz ram. You will see a great improvement in performance by adding another 1GB or 2GB module in the empty slot, or max it out with a 2x2GB kit.
http://support.apple.com/kb/HT1423?viewlocale=en_US
Message was edited by: den.thed

Can I Use DDR2-533 (PC2 4200) ?

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