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Overclocking Phenom II x4 955 BE - Page 4

post #31 of 41
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if this info was for me this is an image of my mobo where are those VRMs and what kinda coolers do i need to cool'em down ?
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AMD Phenom II X4 955 M5A88-M  Asus Radeon HD 7850  Kingston  
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AMD FTW!!
(12 items)
 
  
CPUMotherboardGraphicsRAM
AMD Phenom II X4 955 M5A88-M  Asus Radeon HD 7850  Kingston  
RAMHard DriveHard DriveOptical Drive
Kingston  Seagate Barracuda  Seagate Barracuda  Samsung TSST corp CDDVDW 
CoolingOSMonitorPower
CoolerMaster Hyper 212 EVO Microsoft Windows 8 Pro Asus vx23 Cougar CMX 700w 80+ Bronze 
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post #32 of 41
i had the same problem when my nb was @2600mhz my cpu would not increase at all
post #33 of 41
Quote:
Originally Posted by Alyx89 View Post

one thing i find very weird, is that i can get the nb to 2.5k - 2.7k pc would boot go into windows no instability but core temp becomes 64c + after 2 mins of prime stress testing. i only saw that kinda heat when i had my cpu @ 4.2 - 4.3 and had to go down until i get a better cooler. how does this even adds heat to the core/cpu temps??
all i want from this chip is 4.2. also since i oc'ed my nb should i also oc the ram to 1600 "originally its 1333 but kingston said it'll work @ 1600" or the current 1400 would do?

The "CPU NB" is actually the integrated memory controller. Running it at a higher speed will make it run hotter, and it is on die and will contribute to overall CPU temps. Getting your RAM to 1600 will be a bit iffy. The integrated memory controller on Phenom 2 doesn't necessarily play well with higher frequency RAM, and it may affect how high you can push your CPU/CPU NB. I'd recommend getting everything settled first, and then seeing if you can push any more out of the RAM.
post #34 of 41
Quote:
Originally Posted by ice445 View Post

The "CPU NB" is actually the integrated memory controller. Running it at a higher speed will make it run hotter, and it is on die and will contribute to overall CPU temps. Getting your RAM to 1600 will be a bit iffy. The integrated memory controller on Phenom 2 doesn't necessarily play well with higher frequency RAM, and it may affect how high you can push your CPU/CPU NB. I'd recommend getting everything settled first, and then seeing if you can push any more out of the RAM.

My ram runs at stock 1600 Mhz with a 2600 Mhz NB. The CPU/NB voltage is 1.275v, but my ram runs at loose timings of 11-11-11-28 at 1T. I think the imc is capable of running 1600 Mhz with an overclocked NB just at looser timings.
post #35 of 41
Quote:
Originally Posted by VitalShot View Post

My ram runs at stock 1600 Mhz with a 2600 Mhz NB. The CPU/NB voltage is 1.275v, but my ram runs at loose timings of 11-11-11-28 at 1T. I think the imc is capable of running 1600 Mhz with an overclocked NB just at looser timings.

It's extremely chip dependent. My old c2 955 needed 1.3V on the CPU-NB to run the RAM at 1600CL9 with the NB at 2600MHz. The fact that it could even run with those settings at all was pretty astounding to me.
post #36 of 41
Quote:
Originally Posted by ice445 View Post

It's extremely chip dependent. My old c2 955 needed 1.3V on the CPU-NB to run the RAM at 1600CL9 with the NB at 2600MHz. The fact that it could even run with those settings at all was pretty astounding to me.

Still pretty good for a C2 =D. I haven't tried tighter timings though, I just run it at auto which is DDR3 1600 Mhz 11-11-11-28 with a command rate of 1T.
post #37 of 41
Then crank it to CL9, there's a notable difference. It should still be stable.
post #38 of 41
Quote:
Originally Posted by ice445 View Post

Then crank it to CL9, there's a notable difference. It should still be stable.

Would I need over 1.5v on the memory?
post #39 of 41
Potentially, but probably not much more than 1.6V.
post #40 of 41
I might do it when I have time.
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