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AMD® Phenom™ II Overclocking Thread

Just thought I'd encourage people to keep tweaking those memory timings and overclock the northbridge.

World in Conflict on very high details is one of those titles where, at first glance, the i7s trounce Phenom II. Minimum framerate on i7 is typically double that of a Phenom II.

But wait - in this rather old article - Tomshardware seems to have taken a Phenom II x3 710 and taken it to roughly i7 levels of performance by overclocking the northbridge and tweaking RAM timings.

http://www.tomshardware.co.uk/amd-cpu-overclock,review-31664-8.html

There's a comparison article here for i7 performance. Resolution isn't the same but I suspect mimimum framerate will be similar as it's clearly CPU limited.
http://www.legitreviews.com/article/1199/9/

It's a shame we don't see more pro reviews of AMD chips clocking the northbridge. Surely AMD are missing a trick here? If those speeds are easy enough to attain on newer CPUs, why not put out a chip with a nb clock of say 2600MHz at stock?
 
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I dunno Uriel? . . . maybe they will? . . . . I found a worthwhile increase by upping the CPU-NB frequency too . . . maybe we just got better samples and perhaps a few people may find they can't raise the CPU-NB without heaps of extra juice? . . . I'm still finding all this AM2+/AM3 stuff like the Wild West, probably take me another few months to feel I know what is actually going on here! :D
 
My 955 overclocked to 3.6GHz with good temps
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Nice results the-tazs! :) . . . can I ask you open another copy of CPU-z and show the [Memory] tab please (you can open multiple CPU-z no problem), also don't forget to include your name somewhere in the screenie, happy clocking! :cool:
 
Hello Big.Wayne,

Yes I updated to the 0704 BIOS, it gave me a few more options like setting the HT multi and Load Line Calibration, although with this BIOS AMD OD doesn't reconise the voltages I set in the BIOS as it would before but reconised by Everest.

I also purchased a Coolermaster 212+ last week and set it up facing north/south just pulling up through the heatsink then out the top exhuast fan(Antec P180), but it's more of a sideways step in cooling, so maybe I will swap it around or put another fan on it for push/pull. The noise levels however have been reduced substantially.

In a day or two it should have settled in nicely with the AS5 before I go for a big one but for now, 3.825Ghz @ 225x17 / 1.475 / 1.3, NB/HT x11 @ 2475Mhz / DDR2 900 6-6-6-18. @ 60°c has been my best stable clock, running Prime Blend for a hour.

In an ideal world the above OC would be fine for 24/7 use but I have no need for that amount of power so I'm running @ 965 speeds for the time being.

Can't see my current setup hitting 4.0Ghz Prime Blend stable but then I've still loads to learn and experiment with.

Will post a good Prime session when I get the most from my system and have moved my PC into the spare room as it's generally cooler and I won't be trying to sleep in there.
 
ok so now im done messing with my normal over clock im on to my northbridge :D

im currently sat at a 2400 with no voltage bump . what is a realistic target for a 955 on the nb and what voltage. any help is apreciated.
 
Hello all,

I have some test results to share which may or may not be useful, although these results are taken from an off topic AIIX3425 chip I'm thinking the same principles will still apply with the Phenom™ II

All I have done is run 3DMark03 standard test with the chip at stock, then performed a mild OC on both the CPU/Mem by raising the HT ref. Clock from 200MHz to 250MHz and lowering both the CPU-NB & HT multi from x10 to x8 to keep them at stock, then another test with the CPU-NB multi reset back to X10 (clocking it from 2.0GHz to 2.5GHz) and a final test with the HT multi also set back to x10 (clocking it from 2.0GHz to 2.5GHz).

The IGP wasn't clocked as I was just wanting to see if I could trace the system changes, I should have run several different tests/apps with these different settings but I didn't have the spare time! :p

radeonhd4200.gif


chartr.jpg


So there is definitely some speed increases going on but as I'm using an IGP I'm not sure if these gains are due to the IGP's subsystem getting a boost? . . . would be interesting to run these tests again with a dedicated GPU to see how things worked out! :)

Here a percentage view of the gains, the numbers in brackets are the % boost from the stock system and the greyed numbers are the % boost from the previous results . . .

  • 4266
  • 4481 (+5.04%)
  • 4670 (+9.47%) +4.21%
  • 4818 (+12.94%) +3.16%
 
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