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Where are MOFSETS, and which is better to OC, FSB or Multiplier?? - Page 2

post #11 of 48
Quote:
Originally Posted by ffejrxx View Post
its mosfet

most are right behind the back panel ports


since your cpu is a be, just overclock via the multiplier (it wont change your ram/ht/fsb speeds)
go slow (1 - .5 at a time) and check your temps under load (prime95 for a few minutes)

make sure the cpu temp doesnt go over 60c
A few min i Prime95 isn´t enough to know the max. Temp.
Intel BurnTest 5 runs @ standard will show you the max. temp in around 5 min.

Prime takes 2+h to give me 55c/55c and IBT give s me 70c/70 in 3min
    
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post #12 of 48
Btw, since you have the 555 x2, you are able to go as high as 70C on the CPU temp (not core temp). It's even stated on AMD's product page. Have you tried unlocking it as well? I was able to unlock mine into the B55 x4 with no hassle.

Regarding the FSB vs Multiplier issue... I say you try out both. I prefer increasing both, but that's only because I already know the limits of my system. I prefer my FSB at 219, as I can get my CPU @ 4ghz, NB-CPU @ 3ghz, and my RAM running @ 1752mhz. The highest I've tried to get my FSB up to was 350, though I couldn't get favorable NB/RAM speeds with that FSB, so it's up to you to test how high your system can go and then you can go ahead and mix FSB+Multiplier OC to match your max limit for each component.

For AMD's ram, it only supports a stock speed of 1333mhz, as anything over that is considered an overclock. BUT you can run your RAM up to 1800mhz or even higher if you have a good IMC for your chip. Also, AMD systems prefer tighter timings over faster speeds, so go for the lowest timings you can go.

Your mosfet/power phase is only limited to 4+1, so avoid going past 1.5v. I had actually gone up to 1.55v-1.6v (short usage time, but did stress tests) and ended up blowing my VRMs (voltage regulars for CPU, aka mosfets/power phase). Even though you have a heatsink over them, they have to split the high voltage (1.5v) between 4 vrms, which will stress them out, compared to 8+1 or 8+2 power phase motherboards where they can split the 1.5v into 8 vrms.
Edited by Kokin - 2/20/11 at 4:33am
    
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post #13 of 48
Thread Starter 
I still don't really understand why upping both is a good idea, I can't even see any pros to upping the multiplier directly, when upping the FSB still increases the CPUMhz.

If i up my multiplier, if I remember correctly I got up to 4.2k at which point I failed post (So 4k post which is FSB-200 mutiplier=20). Then I think the FSB I got around 4120 before failed to post.
That was multiplier on 16(stock), FSB on 258 or something.

So I ended up just keeping Multi on 16 and putting FSB on 250 to give me 4k. Which in turn also upped the ram a bit and seems very stable.

Should I think about changing the Multi to say about 18? and then just put the FSB on 228 or so? that will give me 4.1Ghz, and up my "bandwidth" at the same time?

( 18 x 228 = 4104 )
Edited by gcampton - 2/20/11 at 4:42am
post #14 of 48
Bench it a couple different ways and see what is working the best/tighter results... Intel burn test is a good measure. A good OC could take many hours of dickering with settings to get it to your sweetspot.
 
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Yukikaze
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post #15 of 48
Thread Starter 
Also what I said earlier about ram, it AMD really capped to 1333Hmz ram?

Because I purposefully bought 2000Mhz ram thinking it would be better. Cost me around $150 for 4gb(CL9). when I could have got 8gb 1333mhz ram @ CL8, and about half the price of the other...
post #16 of 48
Thread Starter 
Quote:
Originally Posted by Soggysilicon View Post
Bench it a couple different ways and see what is working the best/tighter results... Intel burn test is a good measure. A good OC could take many hours of dickering with settings to get it to your sweetspot.
What do you mean best/tighter results. I can theory craft every combination under 4200 Mhz, but I can not know what is going to be best because I don't fully understand the pros and cons of each. Just about everyone combination under 4200 will work with good stability. It's when I start pushing that I will run into problems.

I know I could probably clock it up to 4300 or higher by upping system voltages. But I don't want to do that, I have already upped the CPu and NB 0.5 volts each to stabilize 3rd core.
post #17 of 48
Quote:
Originally Posted by gcampton View Post
Also what I said earlier about ram, it AMD really capped to 1333Hmz ram?

Because I purposefully bought 2000Mhz ram thinking it would be better. Cost me around $150 for 4gb(CL9). when I could have got 8gb 1333mhz ram @ CL8, and about half the price of the other...
It should give you more "theoretical" headroom when dealing with the fbs/memory dividers. I try to think of caps as being "soft" caps for retail consumer ends of things... ie... its "tested" to do this or that, but in many cases it is capable of quite a bit more... be sure to get the latest firmware for your mobo before getting into to much of that though.
 
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Yukikaze
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post #18 of 48
Thread Starter 
14 x 300 = 4200
15 x 280 = 4200
16 x 262 = 4192
17 x 247 = 4199
18 x 233 = 4194
19 x 221 = 4199
20 x 210 = 4200

What should I pick? I can guarantee they will all be stable.
Edited by gcampton - 2/20/11 at 5:15am
post #19 of 48
Quote:
Originally Posted by ffejrxx View Post
its mosfet

most are right behind the back panel ports


since your cpu is a be, just overclock via the multiplier (it wont change your ram/ht/fsb speeds)
go slow (1 - .5 at a time) and check your temps under load (prime95 for a few minutes)

make sure the cpu temp doesnt go over 60c
But which exactly of all those are the mosfets or the whole thing on the screenshot IS the mosfets?
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post #20 of 48
Thread Starter 
Quote:
Originally Posted by Soggysilicon View Post
It should give you more "theoretical" headroom when dealing with the fbs/memory dividers. I try to think of caps as being "soft" caps for retail consumer ends of things... ie... its "tested" to do this or that, but in many cases it is capable of quite a bit more... be sure to get the latest firmware for your mobo before getting into to much of that though.
Woops seemed to completely missed Kokins post, thanks Kokin & soggy.

Ok so reducing timing on Ram mean I will probably have to lower my Overclock?
And what should I try to set it to? 7-7-7- ? or go even as low at 5-5-5- ?
Got any useful links for tutorials on the subject?
Edited by gcampton - 2/20/11 at 5:32am
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