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6350 OC

That seems incredibly unfortunate.

What is your:

Motherboard
RAM
PSU
Cooler
Temps under load

Also what are your overclock settings?

Did you up the nb/cpu voltage?

Is 4.6GHz all on multiplier? ie, 200MHz bus with a multiplier of 23?

What makes you think you have hit a wall? Like are you booting in and then encountering errors or will it just not boot at all?
 
You'll definitely need a mixture of FSB and multi. There's no way of going higher without both.

Calm down on the volts and get to making sure you have been using both.

Ed. What CPU cooler are you using?
 
My 8350 needed plenty of voltage to be stable at 4.5GHz but I managed to reduce it a fair bit by changing the LLC to high, this helped me to get stable with less voltage. I think it was about 1.4v stable at 4.5GHz then with LLC at high I got it to 1.38v stable at 4.5GHz. Not a major difference, but it might be a small step to helping :)

I also found better results when using multiplier to overclock. If I used the bus it started demanding high voltages. Your temperature seems a little high, generally it's recommended to keep a FX at around 62C and I think throttling occurs somewhere in the 70's (but not 100% sure about that :( )
 
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Avenged7Fold said:
I have always achieved my best overclocks on both FSB and multiplier.
Click to expand...

You must use both on AMD IMO.

I have a second set (board and CPU) and it's a 4+1 crapola 990FX Extreme 3. I got it to 4.2ghz (8320) but with that board I could not touch the multi AT ALL. I had to just use the FSB. One notch up the multi, even with stock everything and it refused to post.

Will be setting them up again over the coming weeks, but even with my CHVFZ I need to use both multi and FSB in order to hit 5.2ghz.
 
ALXAndy said:
You must use both on AMD IMO.

I have a second set (board and CPU) and it's a 4+1 crapola 990FX Extreme 3. I got it to 4.2ghz (8320) but with that board I could not touch the multi AT ALL. I had to just use the FSB. One notch up the multi, even with stock everything and it refused to post.

Will be setting them up again over the coming weeks, but even with my CHVFZ I need to use both multi and FSB in order to hit 5.2ghz.
Click to expand...

I am surprised you could even run it on the extreme 3 at stock without throttling.

Currently sporting two Formula-Zs and a Sabertooth. The formula-zs have the VRM/nb and the CPU under water. On multiplier alone, i can get no more than 4.6GHz but on both, hitting 5GHz isn't that difficult or time consuming.
 
Avenged7Fold said:
I am surprised you could even run it on the extreme 3 at stock without throttling.

Currently sporting two Formula-Zs and a Sabertooth. The formula-zs have the VRM/nb and the CPU under water. On multiplier alone, i can get no more than 4.6GHz but on both, hitting 5GHz isn't that difficult or time consuming.
Click to expand...

at 4.2ghz I was getting CPU throttling on a H60. I changed it to a H100 and the problem went away. That was fully Prime 95 stable with no throttling. All I had to do was put an 80mm fan blowing across the northbridge.



You can see it there next to the 24 pin. Once I did that the VRMs stayed under 42c, no throttling :)

I'll be rebuilding that rig pretty soon. I have set up the swap (company are sending me a new board and will collect old one at same time) so I'll pop into the 83x0 thread and post my new results :)
 
random_matt said:
Spent more than 24 hours trying mixtures, always requires 1.51v at 4.6GHz. Will not go further unless i seriously want more voltage which i do not.
Click to expand...

What sort of errors are you getting?

Will it not boot or will it blue screen?

What is your RAM (speed, brand, timings and whether you have 4 dimms or two)?

Have you turned off things like Cool and quiet and other motherboard features you don't need?

Is your voltage 1.51 at load or is that the voltage you have set in your bios? (if it is, what is your voltage when CPU-Z reports it while you stress test?)

Definitely would drop the voltage, since your temps are quite toasty.

Try this:
1. Drop your RAM to a lower multiplier. If you have 1600Mhz, go to 1333Mhz.
2. Set your nb/cpu voltage to 1.25 (just to see if it helps at all, you can drop it down later if you find out why you cant get past 4.6)
3. set CPU voltage to 1.47V
4. Set multiplier to 20 and FSB to 235 or try 19.5 multi and 240 FSB. This should give you 4.7GHz.
5. Make sure any unnecessary settings are disabled and boot into windows to stress test and check temps.

I have a feeling your high temps are making it difficult to achieve a stable overclock or when you bump up the FSB, the memory is becoming unstable.

If it doesn't work, can you describe the error you get?

Edit: if you think ram is giving you problems on the fsb overclocks, raise the voltage of the RAM. Most RAM will be absolutely fine at 1.65V even if they don't have fancy heat sinks.
 
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Temperatures are what are probably what is holding you back. My mate could get around 4.7GHZ or 4.8GHZ IIRC with his FX6350 and an Asus M5A97 EVO,but temperatures were the issue.
 
4.5GHz is the best OC so far, stable at 1.47v. 4.6+ requires 1.51v and more, clearly hit the threshold on voltage.

A combination between FSB and multi makes no difference on stability.

Load temps are low 70's. Has anyone tried that Zalman reservoir cooler?
 
Your wall is from way too high temps. These fx chips don't like heat and i have gained 200-300MHz before by going from air to water, which made my load temps go from 60C to 36C. This was with the same voltage as before as well.

Combination of multi and fsb DOES make a difference in stability but for you who are likely limited by your temps, you wont see the benefit until you are in safe temps because you wont get more than a modest clock without them lower. Not many fx83xx can reach 5GHz on just multiplier and a max voltage of 1.5, but i am sure the vast majority of them are capable of 5GHz with a combination of both multi and FSB, as long as it is kept cool.

You shouldn't let your temps go past 61C for the FX CPUs.
 
I have a 6350 at 5Ghz and if the temps get up to 70ish, it crashes. It's only one game that causes that kind of temp rise, passes stress tests with lower temps. Computer never blue screens, just freezes and requires a push on the restart button.

At 1.5v, I'd expect you to be at 5Ghz but with stability issues. 1.525v was 5Ghz stable for me.

I had an 8150 at 4.8Ghz previously.
 
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