Is my PSU holding me back from posting my cpu @ 4.0 ghz? Phenom 2 1075T

[Dajinn]

so I got a 1075t chip and have been fiddling with it all day.

it can almost reach 3.7ghz on stock vcore but has trouble, it needs about 2 bumps up from stock to stabilize, otherwise 3.6 is the best youll get on stock voltage. 1.35v will get you 3.7.

1.425v will get you 3.8, then you need another .25 volts to get it stable. but also much higher temps along with it. my pc shut down while stressing it on intel burn test, how sad. temps hovered around 58-62c.

i cant get the board to post @ 4.0 and its either the board, the chip, or the ram.

mind you i'm using a 630w dual 12v rail(18,16 amps on the rails) psu and corsair XMS3 1333 ram til i get the ripjaws + xfx psu in the mail. the xfx is the 850w black edition with 70 amps on the 12v single rail.

annoying thing about these chips is that the voltage field is simply far too low, i barely had any room and i'm already at the recommended max voltage. ridiculous. running NB-CPU @ x7-1869mhz to eliminate the possibility of instability caused by IMC. memory is clocked @ 1068mhz

other voltages are 1.61 dram voltage, 1.21 NB voltage, and 1.35 CPU NB...weak. is there anything i can do? could my psu be too weak to handle it? its a raidmax volcano 630w.

mobo is ga-890fxa-ud5

 

[biostud]

probably not

 

[Schmide]

If your CPU/NB it set to 7x your memory should be running at 710mhz (1420) when at 4ghz which is a bit out of spec I think. Try a 6 or 5?

Thread with over clock results and settings.
http://forums.anandtech.com/showthread.php?t=2071268

Edit Fixed: OOPS that's for a 1055t you have 1075t and a 15 multiplier

 

[xd_1771]

I think I saw your question about this on overclock.net earlier today actually (you might know me from there, I lounge around AMD memory trying to help people with their RAM issues). Considering the 1075T is a 125W PSU (so it takes up about 10 amps non-overclocked) so with a video card that doesn't take up much it shouldn't be an issue. It could also depend on the brand/quality though; Raidmax is not exactly top-tier but I haven't heard extremely bad things about them either. It's probably not an issue at the moment, since most Phenom II x6's can need up to 1.5v or so to run 4Ghz anyway (I run 1.475 on my 1055T). PC's shutting down (or randomly restarting, whatever) during stress tests is also actually not that uncommon. It's even happened to me before.

One more thing, keep in mind that 18 + 16A does not necessarily mean 34A - in which case it could be holding you back.

 

[richierich1212]

With higher overclocks you may need to bump up NB too. For 4GHz it gets very tricky due to memory speed as well. Bump up NB voltage just a little, as well as cpu-nb voltage.

 

[xd_1771]

With higher overclocks you may need to bump up NB too. For 4GHz it gets very tricky due to memory speed as well. Bump up NB voltage just a little, as well as cpu-nb voltage.

I've seen a higher NB voltage help in multiple situations before, so I usually always suggest bumping it up to 1.2 - but his NB voltage already is at 1.2. Of course bringing it up to 1.3V is an option and probably not a huge problem either considering it's the 890FXA-UD5 and the NB cooler is very good.

 

[richierich1212]

ok leave NB at 1.2v. I believe it's your memory speed. Not too often can you run ddr3 @ around 1066MHz. Try the next multiplier. Have you tried 300x13.5?

 

[Dajinn]

i'm at work now so i'll have to play with it all when i get home

 

[xd_1771]

i'm at work now so i'll have to play with it all when i get home

Sounds good; AFAIK the 1075T is black edition, unless maybe you have a non-black edition version? If you have a non-black edition version and are using the motherboard's ref clock to overclock everything, make sure to check the clocks of everything else (northbridge, RAM, etc.), and more NB voltage would indeed help.

 

[Dajinn]

do any of you guys have aim? i can use my laptop to chat with you guys while i do it. my 1075t is not black edition i believe, it has the same colored box as the 1055t and no indication of it being BE. however I can raise the multiplier from 15 to 17.5 in bios but i'm pretty sure that is just because of turbo boost.

 

[Flipped Gazelle]

Your PC may have shut down due to the thermal warning form the motherboard, not necessarily the CPU.

Your CPU's behavior WRT speed/voltage is typical for AMD CPU's. The voltage requirements ramp up steeply as you near the end of the line.

For example, my CPU (see sig) hits 3.3 @ 1.42, but needs 1.5 to get to 3.5ghz.

 

[Rhoxed]

just seems odd knowing thuban, that he has to use so much voltage to get stable at those speeds.

now i know i have a 1090T but stock volts will take me to 3.8-3.9 prime stable, and it only takes 1.375 for 4ghz a 1075T with a newer stepping should best a 1055T which most people can get higher then he can.

do you have Turbo and all power saving features off? and are all your volts set to auto or are all of them manually set?

 

[mrcmtl]

It does seem odd to me too. Unless he got a really bad chip.

My 1090T needs 1.4V to stabilize at 4Ghz.

And you said 1.35V on the CPU/NB? Isn't that way to high for your 1869Mhz?

 

[Flipped Gazelle]

If you look here...
http://forums.anandtech.com/showthread.php?t=2071268&highlight=database

...you'll see that most folks have needed more than 1.4v to get 1090T to 4 ghz, and 1055T goes up to around 3.5-3.8.

Of course, different folks have different definitions of "stable".

 

[Plimogz]

Hey OP, what'cha using for cooling? if you don't mind my asking.

 

[theAnimal]

mind you i'm using a 630w dual 12v rail(18,16 amps on the rails) psu

That's only a 630W PSU in name. In actuality you'd be lucky to get 350W without killing it.

could my psu be too weak to handle it? its a raidmax volcano 630w.

Raidmax = crap. I would highly recommend running at stock until you get your new (and very high quality) PSU.

 

[ljtatej]

I second Animal

 

[Rifter]

And i'll third, raidmax is crap.