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Mulitplier or FSB????

post #1 of 18
Thread Starter 
Tweaking my AMD Phenom IV 965 3.2 and I can't tell which one of these has more effect the mulitplier or FSB?
post #2 of 18
Generally a mix of both seems to net the best result on unlocked chips as it lets you fine tune your RAM and everything. Which board will you be using for overclocking that 965?
    
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post #3 of 18
Multi will only up the CPU, while FSB will up everything else as well. This should theoretically deliver better results, although CPU speed is king. That's what makes BE chips so easy, but also slightly boring and hardly challenging if you really want to delve into OCing.

I forget - is the 365 a Black Edition?
 
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post #4 of 18
The FSB has more of a performance increase, but you'll have to make sure you change the ratios to keep your memory within spec.
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post #5 of 18
Quote:
Originally Posted by Talon95 View Post

The FSB has more of a performance increase, but you'll have to make sure you change the ratios to keep your memory within spec.

On a BE chip it doesn't really matter since there are unlocked multipliers for the CPUNB as well. The only limitation is the RAM, but chances are that the chip IMC maxes before the RAM does (FSB strap wise). I just say a mix of both because you can squeeze out extra MHz on your RAM and NB. Fine numbers that is, where as multi only results in very large chages.
    
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post #6 of 18
So you can increase the CPUNB multiplier to overclock the Northbridge? I ask because the NB gives a nice performance boost to the CPU.. As far as I knew raising the FSB value was the way to do it.
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post #7 of 18
On an unlocked chip I believe that the CPUNB multiplier is also unlocked. Correct me if I am wrong, please.

Do you have the locked or unlocked 1075T?
    
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post #8 of 18
it's locked so I can't tell. frown.gif
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post #9 of 18
Thread Starter 
Thanks for all the replies.

The board is an ASUS M4A79 Deluxe. For three years I had the multiplier at 17 and the FSB at 210. My 3.2 AMD Phenom Black Edition was running at 3.57. This included 1 60gig SSD and 3 1TB slave drives. Remember, this was built 3 years ago. The whole system was tuned to SATA II......everything.

I must say this pc gets used quite often. Not only is it rendering HDTV many hours a day but the same pc is used for high speed internet and downloading large files. I always make sure I buy the BEST pc equipment cause my hope is for it to last as long as possible and as you know, in this hobby, 3 years might as well be 30.

Two weeks ago my SSD craps out on me. Do some research and find the OCZ Vertex 3 is one of the new top dogs........it's also SATA III which is backwards compatible to SATA II.

When my old SSD went, I bought a WD hard drive to get me by and installed Win 7 on it. I install Win 7 on the new SSD and I'm ready to go.

On startup, I get the MOBO screen then I get a diagnostic screen that finishes telling me that SATA 2 (where I have the OCZ Vertex 3) is ATAHI incompatible. Press F1 to continue. Press F1 and all goes well. Win 7 boots (actually, I get a DOS screen listing both Win 7 installs and the latest one is highlighted. 5 seconds later it chooses the highlighted install).

I won't go into the late night hours I spent trying to figure this thing out but I will tell you what helped. My pc has been getting used for about 15 hours a day for 3 straight years. Using it to watch HDTV AND surf the net AND download large files. It gets used more often than any pc out there so I figure if the old SSD broke down, why couldn't other pieces of the pc have trouble too? So I unplugged the SATA II cable from the DVD which almost never gets used and plugged it into the new SATA III drive and BANG!!! No moe diagnostic screen, no F1 button needed and booted to Win 7 no problem. Believe that?????? A physical change as opposed to a software fix. Ah, who knows????

I used to be easily be able to watch HDTV thru my pc on my 42" tv, while surfing the net at high speed and downloading large files. For years. NOW, 30 minutes later system crashes while I'm watching HDTV and it's basically been that way past two days. Watching tv from pc, surfing net and crash.

Crash kinda reminded me of a crash you get O'Cing so I actually slowed down my CPU and wouldn't you know everything is MUCH more stable. No crashes, Firefox WAS crashing every 10 minutes and it's been solid ever since. Had a crash here or there so I went into BIOS and restored all defaults. 3.2gig chip with 4 cores.

Forgot to mention I upgraded the BIOS from verson 2101 in 2009 to version 4101 in 2011. Maybe that helped?

Thoughts:

My whole system is/was tuned to SATA II bandwidth and something happened when I installed a new SSD SATA III OCZ Vertex 3. It's also old and has been used 80% of the time during the last 3 years. Things that obviously helped:

1. Swapped SATA II cables from DVD to SATA III HD and it definitely helped.
2. Upgraded BIOS to it's latest version which was 2 years old.
3. Restored BIOS to default settings and stability seems to have returned.

Basically I think one overclocks a CPU so it runs/gets information it needs as fast as possible. I think installing the new SATA III HD basically did that and clashed with the overclock.

I also believe the excessive use of the pc over 3 years has caused degradation. The SATA II HD that died showed that and even though nothing else died, I'm sure there are parts that long term heavy use has had an effect on.

YOUR THOUGHTS???????
post #10 of 18
Thread Starter 
One more thing. While I am enjoying a crash free environment from Firefox and my system........I definitely notice a bit of a slowdown with my surfing. I am interested in SLIGHTLY overclocking my chip, nothing near what I had before for obvious reasons.

I ran a 17x mulitplier with a FSB of 210 and no Vcore increase. I did bump my PCIE frequency to 105 for a bit of visual impact. My HD appeared much nicer after that change.

These changes took me from 3.2 to 3.57 and the baggage that came with it (well, not the 3 years prior).

Can someone recommend settings to get me up to maybe 3.35??? Hoping this will get that snap back in my surfing without any crashing problems. Thanks.
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