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Quote:
Originally Posted by jsc1973 View Post

Anyway, crank that 8320 up now. The board can handle it. thumb.gif
I intend to, already got it up 4.44GHz at 1.320V (940MHz on stock voltage wheee.gif ), my guess is I'll have to bump the volts to 1.344V soon. Gotta keep the CPU under 50C though, ambient will go up like crazy during summer and my air cooling will boil it (that's why I hate the Mediterranean climate).



And funny enough, stuff got weird once I hit my current clock, and I can't say I've seen that before. I noticed that after reaching 4.44GHz, at +0.050V (222MHz BCLK, 20x multi) I get frequency drops inside HWInfo/CPU-Z/Cinebench, CPU drops the multiplier down a bit, biggest drop I've seen is when it fell down to 3.88GHz (17.5x multi). That same voltage and 4.42GHz, no throttling. And yet, the benchmark results between 4.42 > 4.44 scale up despite the fact that HWInfo didn't register any frequency fluctuations at 4.42GHz. Performance jump going 4.42 > 4.44 was actually 2x larger in IBT and Cinebench than 4.40 > 4.42 even though monitoring software registers frequency fluctuations while those were running at 4.44GHz.

What smells fishy to me is the fact that the voltage doesn't change when frequency drops, and neither do temperatures, just the frequency. There wasn't even the slightest move in CPU temp/voltage during the throttle, that 3.88GHz reading lasts 5 seconds during which CPU had to at least move 0.1C or affect the benchmark result in a way, but nothing happened. Socket temp remained the same, NB temp remained the same, voltage remained the same, everything except frequency did. And that's just not right, that same voltage at a frequency reported (3.88GHz) results in nearly 8C lower temperatures under full load (all except NB which remains the same) and 0.013V higher voltage, I just dropped the multi to 17.5 in BIOS and ran IBT to check. If the frequency indeed began fluctuating, temps, voltage and benchmark results should reflect a drop in performance, but they didn't budge and performance scaled like it should. That didn't happen when it throttled before, far from it actually, benchmark result were a lot lower than usual then.

It just doesn't make any sense at all - running at a 13% lower clock for 1/3 the benchmark should show a lower score and not a higher one. Could it be possible that my monitoring software registers the frequency incorrectly? Regardless, I'll keep upping the frequency as long as it scales since dad always told me to keep doing it if stuff works, advice was about sex but it works quite well on CPUs too. smile.gif



EDIT: Just double-checked what's going on in CPU-Z, it's not the multiplier that's reporting a drop, it's the bus! It sometimes reports a drop to 195-200MHz for a split-second in CPU-Z, HWInfo hangs on it for a bit and shows it as a 5s drop. Could be that NB needs a few more volts, I'll give it more juice and see what happens.

EDIT 2: Yeah, it's the Northbridge, stupid chipset. Caught it going bonkers in CPU-Z: Warning: Spoiler! (Click to show)
Adding voltage doesn't help either, the screenshot above is with extra 0.050V on it, same thing happens when I undervolt it by 0.050V. I don't know how much can this thing take voltage-wise so I won't be playing around with it's voltage until I'm sure.

Right now I think it may need a better fan blowing over it or it could be I hit it's limit, I'll add a better fan first to make sure. I just hope BCLK is not hitting a wall, I'm not done upping it.

EDIT 3: Can't help with BCLK underclocking itself to 200MHz each time I exceed 4.44GHz so I left it at 200MHz and went with a multi-only approach. Gotta say, I don't know what VRMs have to do with frequency but... damn. Completely stable at 4.52GHz 1.344V, just a few days ago it needed 1.380V just so it doesn't BSOD during boot, 1.404 to remain stable. Hah, time to up this sucker and see how much it can take. devil-smiley-019.gif
Edited by Werne - 3/25/14 at 2:00pm
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CPUMotherboardGraphicsRAM
AMD FX 8320 Gigabyte GA-970A-UD3 XFX AMD Radeon HD 7770 Core Edition 1x8GB DDR3-1600 G.Skill RipjawsX 
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Intel Pentium 4 2.4GHz Composed of electronic circuitry ATi Radeon IGP 340M 2x512MB DDR-233 
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The big one
(16 items)
 
The little one
(9 items)
 
Craptop
(13 items)
 
CPUMotherboardGraphicsRAM
AMD FX 8320 Gigabyte GA-970A-UD3 XFX AMD Radeon HD 7770 Core Edition 1x8GB DDR3-1600 G.Skill RipjawsX 
Hard DriveHard DriveOptical DriveCooling
1TB Hitachi Deskstar 7200RPM 120GB Kingston SSDNow V300 Sony Optiarc Scythe Mugen 4 PCGH 
OSMonitorKeyboardPower
Debian GNU/Linux 8 Jessie Samsung SyncMaster 943 Chicony KB-9810 XFX Core Edition 550 Pro 
CaseMouseMouse PadAudio
Chieftec CH-05B-B Trust GXT 14 A sheet of A4 paper On-board 
CPUMotherboardGraphicsRAM
AMD Athlon 5350 ASUS AM1I-A Radeon 8400 / R3 series Kingston HyperX Blu @1600MHz 8-8-8-24 1.350V 
Hard DriveOSMonitorPower
Seagate Momentus 5400.2 Slackware 14 TV Being ghetto-rigged 
Case
Making one right now :) 
CPUMotherboardGraphicsRAM
Intel Pentium 4 2.4GHz Composed of electronic circuitry ATi Radeon IGP 340M 2x512MB DDR-233 
Hard DriveHard DriveCoolingOS
40GB IDE Hitachi Deathstar 20GB IDE Hitachi Deathstar Inadequate Debian GNU/Linux 
MonitorKeyboardPowerCase
Embedded 1024x768 Embedded Brick Plastic 
Audio
Playing 
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