I need help stabilizing a AMD 6x 1075t OC

[DjRabbit]

I am about to just give up on this OC. I have good enough cooling and 3.8ghz shouldn't be a problem on this CPU.
Specs:
650w Cosair TX
AMD 1075t 6x
GTX 480
Asus m4a87td EVO
2x 500gb
1x 200gb
G.SKILL Ripjaws X Series 8GB (2 x 4GB) 240-Pin DDR3 SDRAM DDR3 2133 (PC3 17000) Desktop Memory Model F3-17000CL11D-8GBXL

This is what I have it at the moment.




So what I can I do to make this more stable? On Prime95 3 cores failed in 1 minute and the other three in 5 minutes on the blend test. I disabled some features in the bios like AMD K8 Cool&Quiet and AMD C1E Support. I am not a great overclocker so any advice would be much appreciated .

 

[manu2b]

I think your RAM is clocked too fast. IIRC, memory controller will struggle above 1600MHz (it's rated for 1333, even if it can sustain 1600 without issue).

Try lowering it to 1600MHzCL9

 

[DjRabbit]

I think your RAM is clocked too fast. IIRC, memory controller will struggle above 1600MHz (it's rated for 1333, even if it can sustain 1600 without issue).

Try lowering it to 1600MHzCL9

I see, what should I lower my timings to then?

 

[manu2b]

something like 9-9-9-24

 

[DjRabbit]

something like 9-9-9-24

ok

 

[Lordred]

I agree with Manu, most of the Thubans can run 1600mhz all day long. Once you push past 1800mhz things get less reliable. I would consider no faster then 1800 for every day use.

I would also go into the Bios and lower the HT link.

Just a thought but try in bios the following.

275fsb
X14 CPU Multi (3850mhz)
X10 northbridge Multi (2750mhz) (nb voltage may need to be bumped to 1.25v)
x7 HT Multi (1925mhz)
1333 memory mode (1832mhz)

Just a thought.

 

[manu2b]

^With Thubans, better having the HT link matching the CPU-NB.

 

[Lordred]

That was not my experience with my 1055T and 1100T. Tis a touch hard to boot with the HT above 3k

 

[Frakk]

^With Thubans, better having the HT link matching the CPU-NB.

If your pushing the CPU-NB it helps to set the NT Link to 2200Mhz, but as for keeping the HT Link to match the CPU-NB... its not going to do that anyway, nor does it need to.

I'm running mine at 2800Mhz, there is no way in Hell i will get the HT Link that high, and it makes no difference even if i could

 

[manu2b]

^my bad then

 

[RGone]

Yeah, but the helpers probably just made the water muddy in a novice's thread.

 

[bburrill2012]

That was not my experience with my 1055T and 1100T. Tis a touch hard to boot with the HT above 3k

+1 but i had my ht link around 2200.

I would personally start your oc with 1333mhz ram speed if u can, if not then 1600mhz will do. You can try and push it further but there really is no need.

 

[bassnut]

I agree with manu2b your ram is set too high..... try bumping it down to 1800mhz if you are looking for a faster ram or even better 1600mhz. If you decide to try the 1800mhz unless you have some fanominal ram having your command rate set to 1T will cause you plenty of issues set it to 2T and give it a try again. This should help you some and we'll see where it goes from there.

 

[trents]

I see, what should I lower my timings to then?

You're not confusing timings with frequency are you?

Lower that ram to 1600 mhz. If you will check the JEDEC colomn for 1600 mhz in CPU-z tab "SPD" it will tell you what the timings should be. You should start by setting the frequency to 1600 and the timings to Auto in bios. Then look at the "Memory" tab of CPU-z which will tell you what your current timings are. Compare that to what the manufacturer recommends in the CPU-z "SPD" tab for 1600 mhz and make any manual adjustments necessary.

 

[trents]

^With Thubans, better having the HT link matching the CPU-NB.

That advice has been floating around for a long time since the Thubans first came out but I'm not sure it's always true. Over time we've gotten too many reports from Thuban users to the effect that their HT Link would not overclock as much above the stock 2000mhz as early advice suggested and still give a stable system. It seems a shame to throttle the CPUNB because the HT Link won't do 2800-3000mhz. What I think is true is that when there is too much disparity between the HT Link and the CPUNB you begin to get stability instability but I don't think it's necessary to keep them neck and neck.

 

[RGone]

when there is too much disparity between the HT Link and the CPUNB you begin to get stability

SP stability?

 

[trents]

I meant instability. Thanks for catching that, RGonster.

 

[DjRabbit]

Ok I got a somewhat stable system, ran 95 for 15 minutes and had no errors and temps stay around 56-58 on full load. What do you think could be optimized in the volts? Thank you guys for the advice.

 

[RGone]

tRC shows 25. Likely would do better at 35 to 42 at least for ram being stable.

 

[trents]

Several things:

1. Please include a pic of the CPU-z tab "SPD" when you post screenshots of that program. The SPD tab shows what the manufacturer's recommendations are for voltages and timings at various standard ram frequencies. I asked for this back up in post #14.
2. Please create a "Sig" so that a snap shot of your system information travels with every post you make. This is standard forum etiquite because as the threads get long people otherwise lose track of what you might have shared in that regard in an early on post. To do this, go to Quick Links at the top of the page and click on Edit Signature. You can refer to mine or to one of the other responders for guidelines concerning what kind of info we are looking for in the Sig.
3. Are the temps of "56-58 under full load" core temp or motherboard "CPU" socket temps? An attached pic of HWMonitor following your Prime95 run would be helpful to clarify this, assuming that you have HWMonitor open during the Prime95 stress test, that is.