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Getting RAM past 1600mhz on a 890GX (AM3) and a 955BE.

post #1 of 6
Thread Starter 
So I got some 2133 RAM, I know that the Phenoms are limited stock to 1600 (well on my mobo, I have the ability for 800/1066/1333/1600 by stock). Is there anyway to get this ram up to 1866 or even 2133? I do not care if it's only minor performance in increase, I just want to see if I can get my system stable at 1866 (or hell, even 2133). I'm out of ideas and I don't feel like frying my board in an effort to get this done when I have access to a knowledge base such as these forums. I have my camera at the ready to take pics of all BIOS options. Any help is appreciated.
post #2 of 6
I've had difficulty getting my Deneb stable with high memory frequencies, and ran t at ~ 1420MHz for a long while. recently, after having 4 GHz stable for a long time, I decided to play with the memory settings again. I'm now running 1779MHz, but I haven't prime tested it yet, And I have had some niggles of coming out of sleep mode.

What I did, was loosen the timing right off manually - so if it can do 9-9-9-24 try setting it at 10-10-10-27 or summat. set the command rate to 2T. Up your NB voltage a little (remember to keep it under your Vcore voltage) and raise the speed. See if you can get it stable like that. If not, try a little more NB voltage, and Ram voltage.Once you have it stable, then you can play with the timings, and see how low you can go. just change one at a time.

I've used CPU Tweaker to play with the timings - though you can't set the CL or tWR in the GUI - it has to be done in the BIOS.

That's what I would try to start with. you may get lucky. But I've heard Deneb's struggle to be stable above 1600MHz.
post #3 of 6
Thread Starter 
My major issue is I can't set the command rate in the BIOS for some reason. I'll try as you suggest, I'm just saying 2T is a no-go for some odd reason.
post #4 of 6
yeah, I had that problem on my board to, couldn't find the setting for it. The unfortunate thing is, it tends to help with the higher frequencies. frown.gif

Still, have a play with the other stuff, and see what happens. Oh and be prepared for lots of BIOS resets etc. In fact, if you have to option to save your current BIOS settings first, I'd do that, it may make it easier to reset your settings, rather than doing it manually.
post #5 of 6
CPU/NB volts help.
Most setups like that will do 1580-1920-ish Mhz
maybe a little NBv too;I use 1.26
Maybe you could change command rate with memset or something?
 
Thuban Powah!
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Thuban Powah!
(14 items)
 
 
CPUMotherboardGraphicsRAM
Xeon X5650 Asus P6X58D-E Sapphire HD 7950 G.Skill Trident-X 2600 CL10 
Hard DriveCoolingPowerCase
Samsung 840 pro Bong cooler / RASA waterblock Rosewill Capstone Gold 750 None 
MouseMouse PadAudio
cheap! Newegg box panel ibeats with onboard. 
CPUMotherboardGraphicsRAM
AMD Phenom II X6 1075T w/2 cores locked @ 4.2+ M4a89GTD-Pro XFX Radeon HD 5870 8gb Samsung ddr3 1600 11-11-11-28@ 8-8-8-24 
Hard DriveHard DriveOptical DriveCooling
OCZ Agility2 40gb WD Blue 500GB Lite-On RASA waterblock 
OSMonitorKeyboardPower
Windows & Linux Samsung 1080p 2 ms Dell Thermaltake TR2-800 
CaseMouse
Cooler Master Elite 330 (was) cheap 
  hide details  
Reply
post #6 of 6
hehe! My CPU-NB voltage is 1.31V at the minute! wheee.gif And my Vcore is 1.49V in the BIOS, but sits about 1.488 accrding to CPUz, unless under load. Prime takes it up to 1.504v, peaking at 1.52v.

I needed that to get 4GHz out my chip. And being on a 95W board probably doesn't help. biggrin.gif
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Overclock.net › Forums › Components › Memory › Getting RAM past 1600mhz on a 890GX (AM3) and a 955BE.