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AMD FX-8120 Overclocking/Benchmarking - Page 19

post #181 of 195
Just bought an FX8120 with Sabertooth 990FX mobo and 2x4GB Corsair Vengeance 1600 C9 RAM.

The best OC i got so far:

CPU frequency ~4500MHz
Cpu vcore: 1.38V
Memory ~1750MHz 9-9-9-24 @ 1.65V
HTT: 265MHz
Multiplier x17
NB/HTT freq. around 2600MHz (these doesn't make a big difference in performance though)
Some other V's bumped to the point the value became yellow.

All phase settings set to: Extreme. Watch out with LLC settings as they are set incorrect they will make the temps rise very fast.
The FX is a very strange chip: 1.5V is outrageous for a 32nm chip but the max. safe temp is around 60, seems completely pointless.
post #182 of 195
somebody mentioned CQ settings in bios, what do you guys think they mean?. I am running at 1.25V. and only 3.7ghz(220x17.5). my temp gets up to 59-60 max. I have all my power settings disabled. I have a 500r case and an h100 water cooler, it shouldnt be getting that hot. What will lower my temps? disable thottling? any ideas?
post #183 of 195
Guys, I don't know what I do wrong when I oc . But I can never get close to the speeds you guys get.
I have the 8120 now, with formula V and H100 cooling, and I can't even get to 4!
What is a good oc method, or is there one? I would lie to see 4gz at least without bsod! Lol. Anybody got close to my setup with a good oc going?
Oh yeah, I have thermaltake cooler case, Kingston 250 hyper-X ssd, with ocd 1066 @ 7-7-7. 750 w thermaltake ps. I play with everything in bios, but can't get high. Even when I was running phenom II 1100t BE, I only got 4ghz if I raised vcore to 1.55v.

I NEED OC HELP GUYS!
post #184 of 195
I just got the chip a day ago but my settings so far on a Formula IV board

Core Speed 4515 Mhz
Multiplier x20
Bus Speed 225.8
Core Voltage 1.368
Turbo-diabled

Have not really messed with much else yet still playing temps running 35c Idle and 39 load with an XSPC 360 rad.

Max TDP is at 211w

what power supply do you have? it gets hungry

can you give the rest of your system specs?
Edited by KennethIII - 3/25/12 at 1:09am
post #185 of 195
Fairly new to intense overclocking (did it very mildly about 6 years ago but this was the first build i actually went to push the cpu a good bit). anyway, here's what i was able to manage:

8120 @ 4200ghz (205x20.5) @1.3685v, Extreme LLC, high cpu/nb LLC
Asus 990fx sabertooth mobo
2x4gb G.skill sniper 1866 mgz DDR3
Rosewill challenger case, with upgrade rear exhaust fan (89 cfm Coolmax 120mm)
Coolermaster Hyper 212 plus with stock fan pulling, scythe slipstream 1900rpm 110 CFM pushing
500w rosewill PSU

running prime95 i get up to about 51c core, 61 socket temps. Upping the multiplier higher needed more voltage (otherwise Prime95 would just lock up the whole computer in seconds), which resulted in temps getting into the max range after 15min or so on Prime95, so i don't consider that stable. I tried bumping up the FSB, but over 210 (to cross the 4.2ghz) i have trouble getting it to even boot. How much voltage (and where ) do you guys put to get 230, 240, 250 FSB?? i put it to 220x19 and i couldn't boot. Eh, I'm guessing i'm limited with my PSU somewhat.

I ordered a better top vent fan to replace the case's stock one, also running at over 100cfm, so we'll see how much difference that makes. a lot of hot air comes out of the top right now, so i think it could see a few degrees improvement. Then i might try to push it more. But not bad for an extra $50 for cooling. :-)

I'm pretty happy with a stable 4.2ghz since i don't game. the normal business stuff i run doesn't even put a dent in this sucker, it keeps at 33 degrees core, 38 socket. My WEI index is 7.8 cpu 7.8 RAM with this setup. Considering that's higher than some earlier posts with 4.6ghz, i'll take it. I haven't run other benchmarks though.
Edited by milo99 - 3/26/12 at 3:52pm
post #186 of 195
milo99 if you really want to get FSB (HTT) in the 240 range just remeber it multiplies more than your cpu chances are when your trying to get those numbers your overclocking your ram to high try down clocking it and slowly bring it back up

but Hey! im guessing here you did not post your overclock for ram

good Luck!
post #187 of 195
I'd say higher HTT (and thus higher NB speed etc) with lower multiplier is a few percent faster.
post #188 of 195
Quote:
Originally Posted by KennethIII View Post

milo99 if you really want to get FSB (HTT) in the 240 range just remeber it multiplies more than your cpu chances are when your trying to get those numbers your overclocking your ram to high try down clocking it and slowly bring it back up
but Hey! im guessing here you did not post your overclock for ram
good Luck!

I was thinking about that, but i can't figure out how to change the multiplier on my DRAM. In the ASUS BIOS, if i remember right (i'm at work now) it only lets me choose the DRAM frequency where options are 1866, 1600 (based on a 200mhz clock, that means 9.33x or 8x multiplier respectively) or lower. But if i put a FSB of say 220, i have to either go below the 1866 my DRAM can handle (220x8=1760), or go way over (220*9.33=2052.6). It doesn't let me choose the actual multiplier for the ram. SO right now i'm running at 1912 (205*9.33).

So i'd like to be able to change the multiplier to like 8.5 or 8.7 or whatever based on what FSB frequency i put. But where the F*** is that option?? Or is that not something i can do? Or is that done via changing the NB or SB frequencies?
post #189 of 195
I dont have that board on hand but I belive its much Like my crosshair couple ways of doing this either lower the ratio the ram is being multiplied by ( there are many how to's on this so I wont go into it.)
or go into Advance mode change your Ai Overclock Tweaker to DOCP witch should allow you to select the correct settings for your ram . 1600,1800,1866,2000 etc.............
post #190 of 195
Quote:
Originally Posted by KennethIII View Post

I dont have that board on hand but I belive its much Like my crosshair couple ways of doing this either lower the ratio the ram is being multiplied by ( there are many how to's on this so I wont go into it.)
or go into Advance mode change your Ai Overclock Tweaker to DOCP witch should allow you to select the correct settings for your ram . 1600,1800,1866,2000 etc.............

well, that's kind of the problem, figuring out how to lower the ratio of the ram multiplier outside of the preset 8 or 9.33. But i was able to get it running at 234x19 (4.4ghz) using the 8x ram multiplier (resulting in 1872mhz), but the amount of voltage i needed for that just made my rig too hot. i'm just sticking back at 4.2 for now. we'll see when i get my new top vent fan in if that makes difference in heat.
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