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[OFFICIAL] FX-8320/FX-8350 Vishera Owners Club - Page 4544

post #45431 of 67694
Quote:
Originally Posted by xKrNMBoYx View Post

Does OCing with FSB really result with less Vcore for stability with these Vishera CPUs?
Quote:
Originally Posted by xKrNMBoYx View Post

Alright. Some people swear by it which is what ends up confusing me. I guess it's best to continue just using the multipliers until I find my limit. Then I can play around with FSB OCing to see any differences.
From what I know, using bus speeds are more likely useful when you have problems using multiplier-only OC (High multiplier = possible fail?)

Other than that, there's no absolute change in bus or multiplier OC, other than bus will OC everything with it.
 
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post #45432 of 67694
I havent seen much of an overall improvement past 4400 on my 8350.. im keepin it at 4.6@1.34v and 2530nb/ht and a 230bus and leavin the ram at 1600 with xmp on and my own custom 8 9 8 25 1t timings .. its different for every chip and board/ram/frequency combo and u must change things in small increments at a time to break her in just right .. setting correct voltages and ram timing has been the key for me . Im running only big air and a cm t4 cooler and my temps never get over 52c @4.6
post #45433 of 67694
I used to be scared of fsb ocing til I set the correct timings and nb ht speeds . If u go above 2600 nb it will make alot more heat atleast fir me it did and some boards the nb wont increase at all unless u increase fsb regaurdless of the multi. I believe it takes less voltage with a higher fsb and lower multi but u have to play around with it to get it right
post #45434 of 67694
And YES it takes much less vcore with higher fsb.. all these guys runnin 1.47v@ 4.6-4.7 are doing somethin crazy because mine is stable @4.6 1.34v 230x20
post #45435 of 67694
Quote:
Originally Posted by jonny jon jon View Post

And YES it takes much less vcore with higher fsb.. all these guys runnin 1.47v@ 4.6-4.7 are doing somethin crazy because mine is stable @4.6 1.34v 230x20

I'm in the middle as Im running 4.7 at 1.393-1.404v. FSB OCing isn't a problem as that's the only type of OCing I did until I bought the 8350/860K in 2014/15 and older unlocked CPUs dirt cheap last year.

I'll probably continue to OC with just the multipliers to learn the characteristics of my chip. Once I learn the stable voltages for each OC increment and max OC at my highest allowed temps I will venture into FSB OCing again
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post #45436 of 67694
I did venture to FSB oc with 8370. Got some slightly better results on benches but do to bad RAM I never manage to stabilise it.
Volts remain similar to multi so I discard it because of too much hassle.
Maybe I will try again with better RAM because I found anything from 4,4 to 4,9 stable so far for every step. 5,0 is still remain to be found stable.
As flail points out it will need around 1,42 to 1.44.

Question,did FSB really improves overall performance or its similar in performance to multi?

Sent from my SGP521 using Tapatalk
post #45437 of 67694
Quote:
Originally Posted by xKrNMBoYx View Post

Does OCing with FSB really result with less Vcore for stability with these Vishera CPUs?

Quote:
Originally Posted by FlailScHLAMP View Post

depends on your chip..

^^
This smile.gif
Quote:
Originally Posted by xKrNMBoYx View Post

Alright. Some people swear by it which is what ends up confusing me. I guess it's best to continue just using the multipliers until I find my limit. Then I can play around with FSB OCing to see any differences.

True

Quote:
Originally Posted by 3DVu View Post


From what I know, using bus speeds are more likely useful when you have problems using multiplier-only OC (High multiplier = possible fail?)

Other than that, there's no absolute change in bus or multiplier OC, other than bus will OC everything with it.

First is true. (I cannot dial in 4.8 using multi no matter the Voltage my cooler can cope)

2nd, FSB OC do improve Memory Bandwidth.
(I have tested this using 2 profiles. 229 FSB vs 267 to produce 2133 RAM. Same timings and CPU NB Speed. Higher FSB produced little more gains and lower latency)
Quote:
Originally Posted by jonny jon jon View Post

I havent seen much of an overall improvement past 4400 on my 8350.. im keepin it at 4.6@1.34v and 2530nb/ht and a 230bus and leavin the ram at 1600 with xmp on and my own custom 8 9 8 25 1t timings .. its different for every chip and board/ram/frequency combo and u must change things in small increments at a time to break her in just right .. setting correct voltages and ram timing has been the key for me . Im running only big air and a cm t4 cooler and my temps never get over 52c @4.6

Usual performance scaling is hard to differentiate on daily use. You can see it through benchmarking, but that's just it. Unless you go past 4.8 where, performance jumps a little bit more per unit MHz increase.
Quote:
Originally Posted by jonny jon jon View Post

And YES it takes much less vcore with higher fsb.. all these guys runnin 1.47v@ 4.6-4.7 are doing somethin crazy because mine is stable @4.6 1.34v 230x20

This is OCN tongue.gif "in pursuit of performance" smile.gif
Quote:
Originally Posted by xKrNMBoYx View Post

I'm in the middle as Im running 4.7 at 1.393-1.404v. FSB OCing isn't a problem as that's the only type of OCing I did until I bought the 8350/860K in 2014/15 and older unlocked CPUs dirt cheap last year.

I'll probably continue to OC with just the multipliers to learn the characteristics of my chip. Once I learn the stable voltages for each OC increment and max OC at my highest allowed temps I will venture into FSB OCing again

So True. She'll give in the more time you spend caressing her. tongue.gif

Quote:
Originally Posted by hawker-gb View Post

I did venture to FSB oc with 8370. Got some slightly better results on benches but do to bad RAM I never manage to stabilise it.
Volts remain similar to multi so I discard it because of too much hassle.
Maybe I will try again with better RAM because I found anything from 4,4 to 4,9 stable so far for every step. 5,0 is still remain to be found stable.
As flail points out it will need around 1,42 to 1.44.

Question,did FSB really improves overall performance or its similar in performance to multi?

Sent from my SGP521 using Tapatalk

More to do with Memory Bandwidth and Latency.

Also note, Gigas cannot dial 2400 (X12) CPU-NB using multi alone. It's a known bug for them boards. And 2600 (X13) is already pushing them to extremes. So FSB is the way to go to extract that "little moar" performance.
post #45438 of 67694
Decided to overclock my AMD FX-8350 here's what I got.


Can someone explain to me why my cpu vcore would drop to 1.356v when I'm running prime95? I have it set to 1.4v in BIOS.
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post #45439 of 67694
Just Vdroop maybe.

Guys, what is happening? tongue.gif

post #45440 of 67694
Quote:
Originally Posted by mus1mus View Post

Just Vdroop maybe.

Guys, what is happening? tongue.gif

Now now, don't act all mighty, those GFLOPS Mean nothing (or mostly nothing).
 
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