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Hi all. Messed around a bit with OC'ing on my former craptastic mobo.
Had poor and unstable results. Now with a new Gen 3 Sabertooth 990FX, things are much better.
Can get as high as 4.2 stable, but the temps get very high, very fast.
This is purely from setting the UEFI bios to "performance", with the ram clocked up beyond what the chip supports.
Mushkin Redline 1866, for when the 8350 shows up in the near future.
And 2 hours of Prime95 never saw cpu temps above 61 C. Runs low 50s gaming.

Cpu: 975 revision RB-C3
Name: exroofer
Stepping: C3
Frequency: 3901.2
ref*multi: 216.7*18
CPU voltage: 1.5
CPU-NB: 1.15 (this is supposed to be the voltage shown in bios? set to auto, see this when
I look it up)
nb frequency: 2167.2
NB volts: 1.2
RAM: 8GB 1734Mhz DDR3 10-12-11-30-1T @ 1.5V
Motherboard: Asus Gen 3 R2 Sabertooth 990FX
Cooling: Air cooling/ CoolerMaster S524 downdraft
OS: 7 64-bit

http://s1176.photobucket.com/user/exroofer/media/39GhzPrime952hourruncropped.jpg.html?sort=3&o=0

If only I had some extra cash when I picked up the mobo.
H100 was on sale for $70. Arrrg.
 


with a 975 be you should be able to hit 4ghz just by raising the multiplier and not even touching the reference clock
dont change ref clock and just raise the multiplier to make 4ghz for example 200 ref x 20 multi
leave all other settings on auto except ram
set your ram to 1600mhz and stock timings
going over 1600mhz really does nothing for performance-proven in bench articles
I had a 965 BE at 4ghz easily
the 975 BE should do better.
if you want to go over 4ghz then you will need to raise your cpu voltage
you can go as high as 1.55v safely
dont use mobo auto overclocking feature
 
Thank you for your reply King smp.
I ran it on auto overclock since I was curious as to both how the auto clock worked, and if it was stable.
Seems odd that the software uses this method, doesn't it?
Here are the results from doing it according to the guide from the start of this post.

Cpu: 975 revision RB-C3
Name: exroofer
Stepping: C3
Frequency: 4113.8
ref*multi: 200.7*20.5
CPU voltage: 1.452
CPU-NB: 1.15
nb frequency: 2006.8
NB volts: 1.2
RAM: 8GB 1600Mhz DDR3 9-9-9-24-2T @ 1.5V
Motherboard: Asus Gen 3 R2 Sabertooth 990FX
Cooling: Air cooling/ CoolerMaster S524 downdraft
OS: 7 64-bit

Must have been tired lol, fell asleep, so this ran for over 6 hours.
CPU temp hovered at 57-58 C , must have been right on the bubble of 58.
Bluescreened at 4.2 Ghz with Prime95 running, and I did not want the heat associated with more voltage.
Backed off to 4.1

http://s1176.photobucket.com/user/exroofer/media/41GhzPrime956hourrun.jpg.html?sort=3&o=0

Seems pretty stable to me. Both faster, and cooler.
Thanks again for the reply, and to all the helpful and instructive info contained in this thread and on Tom's in general.
It is my go-to site for unbiased information. ( Yes I filter Intel fanboy info through a specially designed filter. :)

Question. Future plan is to go to an 8350. Since the ram kit is actually an 1866 kit, and the 8350 specs show support up to 1866, would you think running it at that when I do the next step of my upgrade makes sense? I bought it with that in mind.
I have a very limited budget , ($200 and change per month) , So I have been swapping out parts as I go while still being able to game on the computer at every step.
Steamroller seems to be a long ways off still, what is everyone's opinion on buying the 8350 next month, vs. leaving the 975 in place until Steamroller, performance-wise?
One of my main games is Mechwarrior Online, and feedback from friends shows it running across 6 threads, at least. I would be conservatively overclocking the 8350 to 4.5 or 4.6 ish, perhaps more if a H100 winds up in my house.


*edit Oops! had a typo on multiplier. 20.5 is correct.
 
Hard to say if switching to the FX 83x0 would be worth the money, I've been considering it for a long time. Now the rumored fx 9000 has somewhat caught my attention. Especially if it ends up being capable of being clocked even higher, which seems unlikely but I will remain hopeful. I'm gonna restate what King already said and suggest you up the N/B, there is a lot of untapped performance hidden away there.

You seem to have found one heck of a chip 4.1Ghz at 1.45v vcore, that's impressive. Question is can you match my 955's 4.2Ghz at 1.50vcore and 2800Mhz N/B at 1.28...
 
Thanks for the feedback. So 4.1 at 1.452 volts is quite good then? I would attribute part of that success to the Sabertooth board and Corsair Gold rated psu delivering power in a very consistent fashion, as on my old budget board that came with the original system I could not go beyond 3.9, and that acted up after a period of time during long gaming sessions. Old board was Asus M4N68T-M V2. and psu was a budget 500 watt unit. So $90 worth of parts combined vs. $370 (psu was on sale when I bought it) of combined parts. I was hopeful that I would see a significant increase from giving my pc a solid foundation to work from, and was not disappointed.
Pretty sure I could hit 4.2, possibly 4.3, but the heat under Prime95 spikes up to 63 C under short test runs at 1.5 vcore, and 3DMark 11 hits mid-high 50's. That is higher than I like to see for a 24-7 OC.
Also my ambient temp is rather cool right now, 22ish , and I am thinking the 25-26 ish ambient I will have in late summer will push this set up to the upper limits of what is acceptable for temps with a 24-7 OC.
I will test under higher NB freqs next week sometime. What is the direct benefit of this? Feeding the ram a lot faster for more performance?
The idea for buying the 8350 is futureproofing the build for a few years, when multi threaded games and programs become more prevalent. Rumours in various places are unclear whether Steamroller will fit the AM3+ socket.
But 8 cores at 4.8 ish (or higher) on a stable and cool OC, with a video card upgrade (8790?) in the future, seem to me to be a good way for me to go to get a very high performing gaming rig that is low maintenance (no water) and very reliable.

Have been an AMD fan for a long time, and it's not just budget driven. I see Haswell needs ANOTHER mobo swap for the Intel folks.
The return per dollar invested is unacceptable to me. It's just not that much faster in real world applications.
I'm thinking 240/256 GB SSD is the next logical step for me. With some cpu OC tweaking along the way. :)
 
Hi all.
Read through the phenom overclocker's guide (again, read before I got my second posted result) and dl'd the programs suggested by King smp. At 2000 mhz NB, I got CBCPUX=4.599498 (as copied from the saved cinebench result, cpu run)
and at 2600mhz NB (1.175 volts) I got CBCPUX=4.788584 (as copied)

2800 mhz NB seemed like it wanted quite a bit more voltage, and I was not comfortable with the bump it seemed to want to run that fast.
Going to run intelburn for a while with it like this and see how happy it is. Gets pretty warm with intelburn, so I don't know how many runs I can do of it. We shall see.

3dMark 11 score was noticeably higher. Yes i know that is not really a cpu benchmark, but I find it useful for comparison, since my vid card is bottlenecked by my cpu rather than the other way around. So stretching the legs of the cpu helps game performance for me.

*edit. intelburn at 2000 mhz NB, 44 and change Gflops.
At 2600mhz, 54.2210 Gflops. Stress level set to very high.
Oh my.
*edit. 10 runs of intelburn, very high stress level. 61 c max cpu temp, so that was liveable.
Stable across 10 runs. As in I set it to ten runs, and they ran back to back.

Think I'll leave it like that for a few days and see if it's happy. Seems like very solid performance gains to me.
Not pushing for the max OC, but a stable 24/7 do all my normal stuff OC. Looks ok to me.
 
4.1 at 1.45v with a 2600mhz NB is a great 24/7 OC on that CPU
remember that your temps will never be as high as when running a program like Burn Test or Prime95
normal usage will never see temps like that not even while gaming
 
Well thanks all for your advice and all the great info in this forum in general. Played for several hours now, gaming temps are a happy low 50's (like 51 ish) , feels very snappy, I am quite pleased with the result.
Consensus seems to be that those are pretty solid numbers.

Not bad for a chip I bought for less than $120 on Newegg. Must have been one of the last 975's around, I haven't seen anything but 965's in quite some time. Will most likely leave it be for a while, get a good ssd, and watch for news on whether the Steamroller chips will be AM3+ or not. If they are, I will probably wait for one of those, rather than go for a 8350.
 
Followup and feedback.
Still running at 4113 mhz on cpu, 2600 NB.
No glitches, temps staying in line. 24/7 OC, very nearly 24/7 uptime for over a week.
Running two Eve clients on my second monitor, plus Catalyst control to see gpu useage/temps, plus asus thermal radar, to see cpu temp and other mobo temps, plus teamspeak.

And Mechwarrior Online on my main monitor. All at max graphic settings. Which is a Cryengine 3 multi threaded game. All at the same time. 55ish cpu temps while in game.

Yeah, I think I can live with this. :)

Thanks Tom's and the AMD OC club!

Get that in ya Intel fanbois. If this is an example of subpar performance, I hate to think how much stuff I would have to run to need to spend hundreds of dollars more to get my game on.
 
I recommend HWinfo64 for monitoring temps
http://www.hwinfo.com/download64.html

really good monitoring program that is very customizable
also has the ability to run a batch file so it can shut down your system in case temps go higher than you want
let me know if you need the instructions for doing that.
it is not as pretty GUI wise as other monitors but it reads every single temp available.
also small footprint to reduce resources

awesome job on the OC
sad to say my next upgrade will be to my 1155 Z68 secondary rig which will become my main rig
going to get a 3770K hopefully plus SLI my 660Ti
I just cant see any upgrade path for my 1100T that is worthwhile at this moment
with an OC my 1100T is up there with any of the FX series or close enough not to make a difference
shame
 
Well actually, I was deliberately using more resource intensive programs to see how far I could push it with multitasking and still get solid framerates in a game that brings older rigs to their knees..:)
And to load the video card as aggressively as possible.
It actually went to 55c!


But hearing King smp say he is succumbing to the dark side.....Oh noes! Say it ain't so!
I have to keep my upgrades to the $200ish at a time method. At least I get solid performance, and with my investment in the Sabertooth, I shall stay fighting for the underdog for a few years.

I am also a Maple Leafs fan. In both cases, we SHALL be back on top...... some day.
 


You will be defeated by the blue force, even, if you used AMD from years ago...
 
Yeah a 3770K for $250 from Microcenter is just too hard to resist.
to make a move to something more powerful than a 1100T that is worth the money is just not possible with AMD right now
I can get a FX 8350 but also would need to upgrade my AM3 board so cost vs performance the 3770K make more sense since I have a 1155 Z68 rig already

aahh remember the days of the Athlon crushing the Pentium 4 LOL
 


In my things I still have a P IV and Ahtlon XP 1900+ and of course, an old school FX-57....those days....
 
Yeah remember the battles over whether Hyperthreading gave Intel an advantage and how Athlons had better IPC LOL
I had this weird Athlon I got from buying an used tower. I think it was an Athlon 1250. I looked up the CPU and it was made for the Polish market. (OS was in Polish on unit). freaking thing was stock clock at 1.3 or so. I had it OCd to 2ghz stable.
 
I will post screenies tonight and any other tweaks but as a base reference for 24/7 stable:

Cpu: A10 5800K
Name: Sarinaide
Stepping: C2
Frequency: 4200
ref*multi: 100*42
CPU voltage: 1.415v
CPU-NB: 1.325v
nb frequency: 2400
NB volts: 1.2
IGPU: 800mhz
RAM: 8GB Corsair Vengeance DDR3 2400
Motherboard: ASRock FM2A85X Extreme 6
Cooling: Hyper 212 Evo
OS: 7 64-bit
 
Can anyone refer me to a stable fx 8350 4.8ghz guide? What exctaly to change in the UEFI settings, preferable using motherboard M5A99X
 
Go ahead and add me to the Insane Overclock chart for now, but as soon as I have the 2+ hour results posted, you're all done for. 😛 Whammy...

Cpu: AMD FX-4350
Name: jlan86
Stepping: C0
Frequency: 4830
ref*multi: 210*23
CPU voltage: 1.5125
CPU-NB: 1.285
nb frequency: 2520
NB volts: 1.21
RAM: 8GB 1666Mhz DDR3 9-9-9-24-2T @ 1.695V
Motherboard: ASRock 990FX Extreme4
Cooling: Rosewill RCX-Z1 (air; fan speed set to about 2200)
OS: 7 64-bit

Yeah, I know, my RAM sucks. It's definitely the bottleneck (even though Windows 7 rates it a 7.6. Go figure.)

wf4s.png
 
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