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Help to get Phenom 9950 BE over 3 GHz

post #1 of 21
Thread Starter 
Ok, first off, thanks for reading and I apologize in advance if my English is not as good as one would expect.
I should probably confess I've been working with computers over the past 10 years but my area of expertise is software, not hardware. This would actually be my first overclocking and could use some help. Before posting I've read tons of guides and posts all over the internet but just can't get over 2.9 GHz.

Ok, here's my current "stable" config:
  • Processor: Phemom 9950 BE (140w)
  • Motherboard: Asus M3A32-MVP Deluxe
  • RAMs - Kit #1: 2x2GB OCZ 1066 MHz DDR2 PC2-8500 (2.1-2.2v / CL 5-5-5-18)
  • RAMs - Kit #2: 2x2GB OCZ 800 MHz DDR2 PC2-6400 (1.8v / CL 5-6-6-18)
  • CPU Cooler: Zalman 9900 MAX
  • Graphics: ATI Radeon HD 5770 (GPU: 400 Mhz - Mem: 1200 MHz)
  • PSU: Thernaltake 600w (let me know if you need for info on the PSU)

Temp on full load (Prime95) goes up to 45 ºC.

In order to get to 2.9 GHz (from 2.6 GHz) I just raised the multiplier to x14.5 (originally x13) and left the VCore at stock value: 1.3v.

No matter what I do I just can't get a stable system when raising the multiplier to x15. I've even went as far as 1.5125v for VCore to no avail.

Closest "stability" I've achieved so far on full load is: VCore @ 1.3625v (about 4 min) and VCore @ 1.4375v (1 1/2 hours running Prime95). About the latest, the system did not crash, but after a reboot Windows will not boot (BSOD).
Tried to keep raising the VCore but even at 1.5125v the system was still unstable.

I've tried several other things, such as: HT Link @ 2.2 GHz, HT voltage @ 1.36 (while VCore @ 1.4v), CPU-NB multiplier x11 and NB voltage @ 1.2v.
Nothing. Still can't get an stable system.

One thing to point out is that I've not yet tried to change the RAM settings. Mainly because I'm using two different kits with different speed and timings. I'm not so sure how to handle this kind of situation.

What can I do? Any suggestions?

Any help would be greatly appreciated! So, thanks in advance!
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post #2 of 21
800Mhz 5-6-6-18?
You might want to take out this generic RAM to get the best result, mixing different RAM with different ratings/ICs is sure to screw things up
post #3 of 21
I might be wrong but try doing your overclock without the two different kits, first try with the 2x2 DDR2 800 and see what you can do.


Edit: instead of just upping the multiplier try doing some FSB overclocking. Make sure you also have adequate cooling on your VRM's, toasty VRM's can cause instability in high overclocks.
Edited by Kratthew D. Kraids - 3/5/11 at 11:02pm
    
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post #4 of 21
Thread Starter 
Alright, first of all. Thank you both for posting.
I've done as you said and took out the 800 MHz memory kit.

Started with x14.5 multiplier and VCore 1.3v.
Now I'm at x15 multiplier and VCore 1.3750v.

Still unstable. Should I keep going or should I try with the other kit?
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post #5 of 21
It could just be because the Phenom I series of chips were terrible overclockers and you'd be very,very lucky if you got a 400mhz OC out of em.
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post #6 of 21
With SB600, you're not going to see much of an overclock at all. To effectively overclock Phenom, you need a motherboard with Advanced Clock Calibration or ACC- a feature only included in motherboards utilizing SB710/SB750. You will probably hit a wall fairly early. Instead of overclocking just with the multiplier, try adjusting the FSB. Keep an eye on your NB, HT Link, and RAM frequencies though since everything is tied to the FSB.

Anyway, don't be afraid to throw volts at it. It's 65nm, and you will run into temperature problems before you risk damaging the chip from overvolting. These chips can take 1.6v+ and beg for more. Even the Phenom II, which is 45nm (and inherently less tolerant to voltage) can take around 1.5v for 24/7 usage with no degradation. Just keep pushing and see how high you can go! You may also want to increase your CPU-NB voltage a good bit, around 1.3v-1.35v for 2 sticks, and around 1.4v-1.5v if you want to try running all 4 sticks.
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post #7 of 21
3GHz is not going to be easy. Possible, but it depends on your chip and board. I only got ~200MHz out of my old 9850.
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post #8 of 21
Thread Starter 
Quote:
Edit: instead of just upping the multiplier try doing some FSB overclocking. Make sure you also have adequate cooling on your VRM's, toasty VRM's can cause instability in high overclocks.
I've tried that. Several times. But even a slight increase of +1 would give me a BSOD. I hate Windows. But is much better when it comes to overclocking than Linux.
Besides, I've read somewhere that Phenom I are meant to be OC'ed by upping the multiplier rather than the FSB.
My MOBO has VRM's dissipators and I've done some cable management and replaced 3 case fans. Cooling should not be a problem.

Quote:
Originally Posted by hyujmn View Post
It could just be because the Phenom I series of chips were terrible overclockers and you'd be very,very lucky if you got a 400mhz OC out of em.
Yeah, I've read that. For that matter, I also have a Phenom II x4 955 BE and easily went from 3.2 to 3.7 just by raising the multiplier at stock voltage.

However, I've read posts about people getting it up to 3.2/3.4 GHz.
My current target is 3.0, probably will try up to 3.1 GHz if my cooler can take it.
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post #9 of 21
I'll be trying to get my 9750 to 3.0ghz in a few days
post #10 of 21
Quote:
Originally Posted by pablo.santiago View Post
I've tried that. Several times. But even a slight increase of +1 would give me a BSOD. I hate Windows. But is much better when it comes to overclocking than Linux.
Besides, I've read somewhere that Phenom I are meant to be OC'ed by upping the multiplier rather than the FSB.
My MOBO has VRM's dissipators and I've done some cable management and replaced 3 case fans. Cooling should not be a problem.



Yeah, I've read that. For that matter, I also have a Phenom II x4 955 BE and easily went from 3.2 to 3.7 just by raising the multiplier at stock voltage.

However, I've read posts about people getting it up to 3.2/3.4 GHz.
My current target is 3.0, probably will try up to 3.1 GHz if my cooler can take it.
Just because it's a black edition doesn't mean you should only overclock via multiplier. Experienced overclockers are able to fine tune memory and NB frequencies that way. If you stick on 200 FSB you are very limited in what you can run for those. Also, you can typically achieve a higher CPU OC by using FSB + multiplier adjustments as opposed to just sticking with the multiplier.

As you can see, the first gen Phenom processors are able to be overclocked via the FSB:



This was on a single stage, so don't expect hitting anywhere near that on air lol I'm not sure why you would blue screen on upping it to 201, maybe give it another go with just 2 sticks of RAM...
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