am2+ limited to 1 stick of 1066 ram per channel ?

Lately I have not had any problems running 8gb at 1066mhz in my system, seems bios updates fixed the problems.although on rare occasions it bsod and restarts. but really really rare for me.


just make sure all you memory is the same, same brand, same timings, same verything..

my memory is Kingston Hyperx Memory

I did not have to increase voltage for my memory.

I noticed with memory, its cross your figures and hope it works

 

Database updated.
(thanks kicker75, dsbig)

Code:

[B]ASUS[/B]
[I]AMD Chipsets[/I]
M3A32-MVP Deluxe
M3A78-EM
M3A78-T
M3A79-T Deluxe
M4A79 Deluxe

[I]nVidia Chipsets[/I]
M3N-HT Deluxe
M3N-72 Deluxe
[B]
MSI[/B]
MSI K9A2
MSI DKA790GX
MSI KA790GX


[B]DFI[/B]
LP DK 790FXB-M2RS

[B]ASRock[/B]
K10N780SLIX3

[B]Foxconn[/B]
Destroyer 780A

[B]Gigabyte[/B]
GA-MA770-DS3 r1


Crosshair II Formula


**DOESN'T WORK**
M3A78-T (further testing and verification pending)

@ heliman: (first, thanks!) Now, your M3A78-CM has 2 yellow banks (which is a channel) and 2 black banks (which is a channel) - for Dual-Channel support, you need to fill both the yellow, *OR* both the black (ASUS has done wonders with their memory controller support, allowing you to achieve Dual-Channel with either channel 1 or channel 2 instead of being limited to just 1)
To answer the second question, you should be able to fill all 4 slots and get 1066MHz, as long as all the sticks are 1066MHz, *and* you can still overclock some, just not as much as you could with only 2 banks populated.
Last, the mem multiplier that you're thinking of is the NB and/or HT speeds. I'm not familiar with your BIOS, so I can't tell you how it reads, but should say something like HT Frequency 2000MHz (or 2GHz), and the NB is usually always shown as a multiplier (10x).
They're both actually multipliers, it's just that ASUS (and many other motherboard manufacturers have chosen to show the HT as it's DDR speed rather than it's multiplier like the NB)
Both the NB and HT's multipliers have a default that's set by the CPU that's in the socket - in the Agena cores (9850BE in your case), the default is 2.0GHz (2000MHz)
Now, it's not necessarily up to the CPU to cap out when raising the NB or HT, it's up to your motherboard...so you *may* be stable at up to 2600MHz NB and 2600MHz HT, but I can't tell you what's going to be stable and what isn't - just remember that your HT *MUST* be equal to or less than the NB (HT = < NB) and that BOTH of them are still multiples of your FSB (i.e. NB Multi 10x * 200FSB = 2000MHz, or HT Freq. 2000MHz = 10x * 200FSB...same thing even though it shows different in BIOS) - so, as you increase the FSB, you also are increasing the NB and HT frequencies...watch this as it will throw you off real quick.

Last thing for you, Bro, is to know that you're not going to achieve the full 5200MT/s...most boards and CPU combos simply don't do it, but don't feel like you're missing anything...overclocking the NB and HT by huge amounts really won't help you gain any frames per second in games, so really, I just don't even think about it anymore.

Good luck!!

Psychlone

 

Sorry for being a little off topic, but i don't understand some claims from manufacturers, according to my mb manual, in order to "boot succesfully" it has to have slot 1 populated.
The problem is that i have an aftermarket cooler that obstruct the first slot, so i used slot 3 and 4 and is working perfectly on memory recomended tight timings, low voltage, dual channel and all, exactly as it worked with slots 1&2 populated with stock cooler.
Looks like some of those claims are to prevent legal issues when someone fall in the bad percentage of probable failure to run.

 

Psychlone,
You ARE an AMD Guru with a mountain of patience. Thanks for the info, now that I know what to look for im going to tinker. I guess Ill mainly just try to get my mem to run 1066. The Patriot mem stated on the website that it supposidly was 1066 mem & so it downclocked for my M2N which would only do 800MHZ. All 4 dimms are the same ones so thats a plus. Will they really do 1066? Thats the real question I guess. Thanks again very much.
Dave

 

@ Markgpl: I seriously have no idea why they feel they have to say things like this - perhaps it's to cover their butts in case someone tries and it doesn't work for some reason, but I do know that ASUS isn't the only motherboard manufacturer that has conquered the idea of running Dual-Channel in different ways...I think ASUS was just the first.

@ heliman: (thanks!) On your new M3A78-CM board, they should, since the board is 1066 compliant and capable, whereas the M2N wasn't.

MOST, if not all, motherboard manufacturers had to have the standard AMD disclaimer that 1066MHz isn't doable with more than 2 banks populated, but as I've shown here, that's certainly not the case (I don't have an authority problem, I simply won't be led like most of the sheeple out there! )

All it really takes is manually entering the speed, first 4 or 5 latencies and the RAM's voltage...this is common with all the boards that are capable of running more than 2 banks at 1066, and to date, there's still only the one board that was proven to not pull it off.

I'd say your chances are at least 95%...so I'd say good luck, but you probably don't need it!

Oh...almost forgot - running in UNganged is going to be faster and still works (perhaps even helps force) with Dual-Channel modes.
If you think about it this way:
You've got 128 lanes on a freeway that all the traffic moves in one direction until it all reaches it's destination, then turns around and goes back.
Or, you've got 64 lanes on a freeway, going both directions at the same time.

This is a simple analogy of Ganged vs. UNganged. Ganging the memory is a single 128 lane freeway, where the cars (data) has to queue and jockey for position, and UNganging is 64 lanes going in each direction at the same time.
To date, there are no multithreaded benchmarks that correctly show the benefits of UNganged memory (even the newest SiSoft Sandra only pushes a single thread), so there's no way to quantify with Empirical Evidence that UNganging is faster and better for our AMD IMCs (Integrated Memory Controllers), but that day will come, and you can say you heard it first!

Good luck! (oh yeah, you're probably not going to need it)

Psychlone

 

Psychlone,
After using your advice my sys mem is from 400MHZ(800MHZ) to now 533MHZ(1066MHZ) as shown in Asus PC Probe 2 now in windows and is rock stable so the Patriot is ok mem for 1066 speed. You can add the Asus M3A78-CM to the M/B list if you wish. I have all 4 banks filled to 8 gigs also by the way as you said could be done.
Dave

 

I've some issues with 4 sticks of 1066mhz ram in a M3N-HT, I posted a thread about it here. I see that you put the M3N on the list of able boards, so could I just be unlucky and have a bad board? Or should I sulk and just go back to 800mhz?

Oh... I just read the above post by psychlone... I'll have to try that when I get home.

 

Was able to pass a memtest86+ test with the RAM set to the extremely conservative default settings, 5,7,7,24, but at 1066mhz speed nonetheless...
Apparently there's an issue if I use the "Enable SLI memory - Optimal" setting, or input the EPP settings of 5,5,5,15 @ 2.1v ... even with just 2 sticks :|

 

just tried 4 sticks of 1066mhz in the biostar ta790gx 128m , it will not boot @ 1066mhz but will @ 800mhz . so no 8gb of 1066mhz for me on this mobo , mind you it will not run with my 2x 3870x2's either . this board is a total letdown

 

Almondman:

I got an M3N72-D with 4x1gb of corsair dominator 1066mhz and it works perfectly.

My cpu is oc from 2300 to 2932.
HT is oc from 1800 to 2040.
Memory is running at 1020.

Here is my bios settings:

Memory Voltage: 2.313V
1.2V HT Voltage: 1.425V
NB CHIP Voltage: 1.409V
CPU-NB Mult: 8x
CPU-NB Voltage: 1.40V
CPU Multiplier: 11.5x
CPU Frequency: 255
PCIE Clock: 100

SLI-Ready Memory is set to Optimal with CPUOC set at 0%, AMD Virtualization, CPU C1E Support, Live! and Cool'n'Quiet are disabled.

DRAM is configured as

Tcl 6
Trcd 6
Trp 6
Tras 18
Trc 23
Twr Auto
Trrd 5
Trwt Auto
1t/2t Memory Timing: 2T
DRAM Ganged Mode: Disabled
Memory Hole Remapping: Enabled.

The system runs in a thermaltake element-g casing paired with the thermaltake big typhoon vx huge heatsink/fan..

It can runs Everest stress test until i get tired of it, so far i let it for +/- 1 hour with no problems.

And countless hours of street fighter 4 gaming!

Pretty happy with this system so far, upgraded from a athlon x2 6000 with an msi k9n-sli, with 2 gb of ddr667. Video card is still the same tho, geforce 8800gts 640 mb.. still does the job in most game at 1920x1200 with highest details. Althought the latest batch of games, i'm starting to have to lower the res to either 1680x1050 or 720p resolution.

 

kicker75:

That seems like a very high memory voltage setting? The "factory" specs for 1066 5,5,5,15 for these is 2.1v, and 800mhz is 1.8... so seems like a rather hefty overvolt?
I haven't been doing any overclocking lately, don't really need to as I'm down to a single 8800GT and the X3 720 is plenty for that.

Thanks for your reply, though. I'll see if it's worth giving a try. I had the M3N72D at first, but I turned it in after I read that the 750A chipset apparently didn't support the 4 1066mhz sticks. I wish I'd seen this thread before spending more on this 780 board...

 

Almondman: Well it sure is some voltage on these sticks, but i've started at 2.1v and it wasnt 100% stable, then raised to 2.2v, and it was almost stable, and at 2.3v it seems to be. The ram is set to 800, but runs at 1020mhz because of the bus speed. Also, with 2 sticks in, i can run at the same overclock with the ram set to 2.1v, but since i wanna have the whole four of them, i had to raise a few voltage here and there. CPU-NB, 1.2V HT, and MEM Voltages... as well as raise the memory timings a little to 6-6-6-18, instead of what you said, 5-5-5-15 (i can run at this latency settings with 2 sticks).

Hope you can make it work too on your board.

PS: Take a look tho at the thermaltake element-g if you dont have a picture of it in your head Even at this voltage settings, i'm running at a breezy, 29C CPU Cores TEMP at idle, reaches in the 40s when loaded. And the memory is warm to touch, but they got such big heatsinks and the huge top fan of the element-g blows air straight on them, I guess it helps alot.

 

kicker75, cooling is not an issue in my case idle my CPU cores sit at 26degrees, Zalman Cu9700Cnpsc, and there's a 250mm fan in the side of my case blowing directly at the RAM.
I'll post an update when I get round to playing with the RAM, won't be this weekend though.

 

Still getting bluescreens running at the conservative settings :| not sure if it helps not using sleep mode, but sleep is so damn awesome. Waiting for the PC to boot is out of the question now.
Maybe I'll just clock them down to 800mhz and be done with it :|

 

K, bluescreening at 800mhz "SLI" settings... I guess it's the motherboard that's bad.

 

AAAARRRRRRRRRG! NOOOOOOOOOOO!
Now, there's no reason to be brash and jump to conclusions here!!

Ditch those SLI settings and test...all that crap does is force some lower latencies that may account for the instability problems. Besides, like forcing AA/AF in drivers and in game at the same time, it's entirely possible that one is canceling out the other.

Perhaps we should start over - howz about this: Go make a new post here in the AMD section, call it X3 720/M3N-HT Overclocking, and we'll start this thing from scratch. It's entirely possible that there's some other conflicting setting that's being problematic here, because we have confirmation that 4 populated banks in the M3N-HT is possible at 1066.
We'll tear your BIOS apart and see just wtF is happening here!

Just to keep this thread's continuity, let's keep posting up boards that are known to run at 1066 with more than 2 sticks, or boards that can't, and you and I will continue this from a clean slate and get it figured out.

Take care,
Psychlone

 

Psychlone - First off, humbly, I bow to your generous attitude and applaud you for teaching the rest of us!
I must PROTEST that you have an M3N72-D on your chart of functional 4-Dimm 1066 mobos, but I (owner of one) have evidence to the contrary. Also, the owner of the supposed working board (in this post - robotechzd I think?) does NOT actually confirm the use of 4 DIMMS, unless you and he talked privately.
This is just a short post (at work now). I will be returning tonight to post system stats, what I've tried, what DOESN'T work haha, and to learn more about this entire process.

Psychlone - PLEASE keep this thread alive. Just talking to friends, I have found this to STILL be a huge problem, as many of us are AMD fanboys/girls.

 

Ok all, my system stats are filled in. NOTE - OCZ2RPR10664GK is the same as OCZ2RPR10662G - the 4GK was the 2x2Gb package.
I have used all of the successful settings reported by others, I believe.

RAM Timings: (I have since started to mess with tWR, tRRD, and tRWT to try and see if uber-specific settings like these have an impact - so far no)




CPU-Z reads everything correctly @ 2Gb, shown here.



I have run 4Gb for a couple of days now, bluescreen once, locked up everything twice.
So I am NOT stable even w/2 DIMMS.
Have used 2.108 and 2.255 for voltage without success. Haven't fudged NB voltage at all, although I am hearing some positive results about this tweak lately.
Absolutely can't run all 4 DIMMS at 1066. Can do fairly well with all 8Gb @ 400Mhz, but that's not why I bought DDR21066 RAM lol.

So please, everyone! I would hate to be the guy to prove a motherboard incapable of 4 DIMMS @ 533Mhz.
Anything you can think of - even if I've already tried it - I'll try it again. I AM DESPERATE!
Hopefully someone will respond soon. Thanks everyone!

p.s. - I think I'm on to something - going to check it out tonight. Perhaps ASUS 20+4 pin motherboards are the culprit? I see (online, other forums) so far that 20+8 pin boards seem to have 0 issues, but I haven't verified this against "The List". Will start researching this tonight.
My theory - unstable power frequencies/ratios to NB when running AM2+ processor on AM2/AM2+/AM3 boards with 20+4 pin power connectors make 4xDIMM population impossible.

 

That is a good theory - I have to admit that I've never thought much about the pinouts and the extra 4pins by the CPU as bring a culprit, but it does make a little sense.

I do vaguely remember having personal dialogue with robotechzd via PM, but can't remember the context and have long since deleted those PMs (my inbox fills quite quickly).

So, just so I'm clear, you've:
**Installed the RAM in the same channel (i.e. banks 1 and 3, or same colored slots, be they the first OR the last on the board)
1) Manually set 1066MHz
2) Manually set the first 4 latencies (usually 5,5,5,15, but should be the manufacturer's recommended latencies, and the CMDR at 2T)
3) Manually forced UNganged mode
(all of which your BIOS screenshot definitely shows...just making sure)

So, you say that you've run 4GB for a couple days, yet unstable. I'm assuming that you've run them at DDR2-800MHz, correct? Of so, what I'm getting from that is either you have a bad stick, or you are unstable for another reason (overclocking, undervolted, etc.)
If you haven't already run Memtest86+ on each stick individually, I would do so at your earliest convenience (perhaps while you sleep, considering the time involved?)
...now obviously, this isn't going to correct the inability to run 4GB at 1066MHz, but it will be a good indicator of why you're not stable at 800MHz (if that's the case) - failing a stick would make all the difference in the world on your instability.

After determining the instability problem, we can work further on determining if you can indeed run 1066 with those 4GB of RAM.

Take care, and sorry for the late reply - I've been *very* busy with my computer repair business lately.

Psychlone

 

Psychlone!
Great ideas all - sound troubleshooting. After quite an extensive round of testing, sure enough, one of the matched pairs (of 2) I bought are bad. What was REALLY screwing me up, when I was complaining that I couldn't even run 2 DIMMs with stability, I had mixed up the pairs; was running 1 bad stick and 1 good stick LMAO. Didn't notice I had mixed them up.
SO - now, I have been running with the GOOD pair, dual-channel, unganged, 5-5-5-15, CR 2T, @ 2.055V, and LIFE IS GOOD! No crashes or BSOD, memtest showed 1 20bit error on test 7 after 6 1/2 hours of testing. 1 error. When I asked several friends about this, they predicted that "if you run memtest long enough, you'll get an error of SOME kind". Looking up the test results, the error was a "move" function that missed 20 bits out of 4096K of data, so proportionally speaking, that is acceptable to me

SO NOW! I await my RMA for the bad pair, and we will pick up where I left off.
I am in the computer repair business myself (Desktop Support in a corporate environment), so I COMPELTELY relate with *very* busy - holidays and all that.
Thanks for your time Psychlone - talk to you all soon.