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post #4011 of 7371
Quote:
Originally Posted by Maurauder View Post

Is it normal that the HT link multiplier only goes to 13X (2600mhz) in my bios. The NB and core frequency are completly unlocked but is there a way to bump the Hyper Transport speed to 14X (2800mhz) ?

Because the HTT is locked at a 13x Multi, the only way to increase it is to raise the FSB. So, yeah it is normal. From what others have said on here for overclocking, there isn't any gain in raising the HTT. Also since you have to raise the HTT voltages, it seems a waste. But that doesn't mean you shouldn't try it out.
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post #4012 of 7371
I can raise the ref clock i just wasnt sure why the HT clock maxed out @ 13x
post #4013 of 7371
1.5v for 4.6Ghz isnt too uncommon. My FX-4100 needed 1.48v-1.49v for 4.6Ghz, but due to the way the MB set voltage it had to be set to 1.525v.
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post #4014 of 7371
Thanks for the info guys. The NB and HT voltages were set to Auto so I adjusted them. PCIe lanes are already set to 100. I had the CPU voltage much lower but couldn't run Prime. I also set HT to 2200MHz. I don't know what the stock setting is tho so this was just a guess.

Any ideas as to why the core temp reading jumps around so much? It reads as high as 43c and as low as 11c. Under load it's steady just at idle so I can't get a stable reading.
Edited by tw33k - 3/28/12 at 1:21pm
post #4015 of 7371
The only time core temps are ever usually accurate is when your under load so....
post #4016 of 7371
OK...thanks. So it's not just happening to me.
post #4017 of 7371
Any FX guys here going to pair up a GTX680? Im curious if bottlenecking would occure.
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post #4018 of 7371
Quote:
Originally Posted by Maurauder View Post

The only time core temps are ever usually accurate is when your under load so....

Old lore, wrong. RTFM: http://support.amd.com/us/Processor_TechDocs/41256.pdf and http://support.amd.com/us/Processor_TechDocs/43375.pdf (for Familiy 10h but 15h has the same implementation according to AMD.)
Tctl=Tj-some_secret_offset.
some_secret_offset is somewhere around 15 to 20C.
The only reason why Tctl looks accurate under load is that under those conditions the temperature delta between your socket and the die is approaching or exceeding some_secret_offset.
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post #4019 of 7371
Hi All,

Finally settled on 4.5 Ghz, 1.465 in bios and at Idle, and 1.488 under prime 95 full load she passed 2 hours no sweat so that'll do me. 4.6 just requires too much Vcore and of course the temps and power draw go up quite a bit. still more fun clocking these than the Intel i5's , as in these take more skill.

My config

4.5ghz @ 1.465v 22.5 multi
HT FSB 200 Mhz
NB 2400
HT 2400
Ram 1866 @ 1.61v 10-10-10-28 1T (overclocked from 1600)

She runs all I ask with ease and game play in BF3 is noticeably smooter than my i5 2500k @ 4.8Ghz (less if no microstutter). Until Piledriver comes along or the 8 cores hit bargain prices the FX 6100 is a great CPU mine only cost £112 so bargain chip!! smile.gif
Edited by Cool Breeze - 3/29/12 at 1:15am
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post #4020 of 7371
I posted this info in the FX-8XXX club and figured I would post it here.

Just a general torubleshooting guide for dealing with Bulldozer Overclocking issues form my experience.

- Different frequencies across cores: APM is still active, update BIOS or use Overdrive on every reboot to enable/disable
This one was solved early on with BIOS updates on most boards.

- Frequency throttling to ~1.7 GHz for split seconds in TMonitor: VRM is getting hot and throttling speed
Seems to be an issue on a few boards that have poorly designed heat sinks on the VRM's like the Fatal1ty 990FX. It's been reported that some lower end boards don't throttle even with high VRM temps though and simply crash.

- Multiplier dropping to x7: Socket temp is high and throttling CPU
This problem was solved as soon as I put a fan on the back of my motherboard socket that dropped the temperature by 10 C.

- Black screens or crash during Windows loading: Might need more voltage on core
Issue was always solved by upping the VCore

- Screen freezes but no corruption: CPU-NB, HT, VDDA voltages need tweaking
Issue was always solved by upping the other voltages

- Screen corruption and crash: High core temperatures and/or needs a voltage bump on DRAM
Normally just needed an additional voltage bump. these crashes usually happened when stressing the memory in Prime95 or Linpack testing. Upping the VDRAM helped sometimes.
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