Vishera max voltage question

[SlowSpyder]

I have my 9370 up and running, quite the experience diving into water the first time.

I am in the process of overclocking and stability testing right now. My question is to those who are somewhat in the know with AMD / Vishera / 32nm, assuming good temps, what would you say the maximum safe voltage is for 24/7 use? What do you think the chip can handle for the occasional benchmark session where I push harder?

And lastly, can anyone suggest a good temp monitoring program for AM3+? Coretemp and AMD's own Overdrive just bounce around, often below ambient. Or will I likely be flying blind?

Thanks!

 

[SlowSpyder]

1.55v ok? 1.6v? 1.65v? :twisted:

 

[Rickyyy369]

I've always heard 1.55v is the maximum safe voltage for day to day use. Of course if temps aren't atmosphere-igniting high, then you could probably go 1.6 for short periods of time, but at your own risk.

I use HWinfo64 to monitor my temps since it gives a lot more information than HWmonitor, but those two programs always gave me the same readouts for core and socket temp.

HWinfo lists out 2 different temperatures for CPU

The "Core temp" sensor is a little wonky at idle and lower temperatures, so sometimes it says you're running below ambient. But once it starts heating up, its more accurate. Core temp shouldn't go above 62C I've been told.

Where it says "socket temp" is the CPU temp sensor on your motherboard and it usually runs hotter than the core temp. I've heard it should stay below 72C and my board will throttle my CPU down to 1.4ghz if that temperature ever goes above 75C.

 

[SlowSpyder]

I'll give HWInfo64 a try shortly... and yea, I did notice what you mentioned about Coretemp on my system as well. Sometimes when there is no load it bounces around, but once I start benching it seems to start reading like you'd expect. At idle Coretemp seems to be ~8-9C less than what the BIOS shows at idle.

Right now I've climbed to 1.64v, but during benching it seems to drop to around 1.56v-1.59v if I go by CPU-Z.

The FX9370 and I are having a disagreement over what clockspeed it's going to run at. I will win this argument...! :biggrin:

 

[AtenRa]

Right now I've climbed to 1.64v, but during benching it seems to drop to around 1.56v-1.59v if I go by CPU-Z.

For everyday use i wouldn't go above 1.5v and that depends on the temps. Could you tell me the voltage at default ??? Also, could you turn off Turbo at 4.4Ghz and see the voltage again. ??

 

[SlowSpyder]

For everyday use i wouldn't go above 1.5v and that depends on the temps. Could you tell me the voltage at default ??? Also, could you turn off Turbo at 4.4Ghz and see the voltage again. ??

Set it to auto?

1.5v is the default for the FX 9370 and FX 9590. So I'd like to think I can go above that, but then again it likely that these are nothing more than speed binned CPU's, all other Vishera run well below 1.5v.

 

[guskline]

SlowSpyder, what MB are you using?

 

[guskline]

My 8350 rig at 4.6Ghz is running at 1.44v 24/7. I use a 219 fsb x 21 multiplier because increasing the multiplier ramped up the heat. Since the 9370 is defaulted to 1.5v I would stick with that and see how much further you can push it.

 

[SlowSpyder]

SlowSpyder, what MB are you using?

I am using an MSI 990FXA-GD80 v2.

My 8350 rig at 4.6Ghz is running at 1.44v 24/7

At or below 5GHz for this FX 9370 seems to be the sweet spot. I can hit 5GHz on the factory voltage (it is in the 1.49 range, at work now so I can't see the exact voltage right now.) But jumping to or above 5.2GHz takes 1.6+ volts. But when benching, I've seen it drop as low as 1.52 volts at the higher clock speeds. I don't see any kind of LLC settings, though I haven't thoroughly scoured every nook and cranny of the bios yet.

 

[SlowSpyder]

I found this linked somewhere else:

http://sites.amd.com/us/Documents/AMD_FX_Performance_Tuning_Guide.pdf

Page 19 has some interesting info regarding voltage. It is for Bulldozer, I'm going to assume these values are the same for Vishera (maybe I shouldn't assume, but... meh). If I trust Coretemp I've only once seen 50C @ 1.65v, typically I'm in the mid 40C's. That may be a little much for regular daily use, especially in summer when my home is 4C-5C warmer, though. I guess I'll be a guinea pig for daily use above 1.6v. Wish me luck. :twisted: :biggrin:

 

[AtenRa]

Set it to auto?

1.5v is the default for the FX 9370 and FX 9590. So I'd like to think I can go above that, but then again it likely that these are nothing more than speed binned CPU's, all other Vishera run well below 1.5v.

1.5V ?? hell, thats why they are rated 220W TDP.
What water cooling do you use ??? any pics ??

 

[SlowSpyder]

1.5V ?? hell, thats why they are rated 220W TDP.
What water cooling do you use ??? any pics ??

I have what I think is a pretty strong cooling set up.

I have this radiator. It is really for cars, but you can find them for $45 on Ebay. It is roughly 18" x 8" x 1". The fan I am using is a 10" fan, again for a car radiator.

I don't like the fan because it hangs over the top and bottom of the radiator too much, so I don't think it really creates any pressure.

Here is a picture of the fan on the radiator and mounted to the case.

I am using this pump, a Swiftech MCP655-B.

It is mounted right behind the DVD drive I was using during the build process in this pic.

I have this Koolance CPU-380A CPU cooler.

Here is a pic of it installed.


*edit - I should add, even though my setup works as is, two 180mm fans will fit perfectly on the radiator. So I am thinking I will remove the 10" fan on there now and replace it with two or four of something like these. Four in a push/pull set up would be great. I have a 6 x 30 watt controller, so why not.

 

[AtenRa]

Aaaa nice. Remind me of my old modding WC days.
I believe it is time for a new 2014 project

 

[SlowSpyder]

Aaaa nice. Remind me of my old modding WC days.
I believe it is time for a new 2014 project

I think you should! It was a really fun project... I just wish I could get a bit more clock speed. For some reason 5.3GHz was the magic number in my mind for no reason really.

I am running 243 x 21 and my ram at 1944MHz (CAS9) which really isn't too bad. Well, off to push the voltage I go, wish me luck. :ninja:

 

[SlowSpyder]

I'm fairly convinced that my problems aren't the temperature or probably not even the CPU. But I'm dropping a lot of voltage during heavy work loads. I set it all the way up to 1.63xxx, during the Cinemark bench as I was watching CPU-z it was reporting as low as 1.53 volts. 5.245GHz is probably a tall order for 1.53 volts. I don't know if it is the power supply or the motherboard.

 

[jvroig]

Same experience with an 8350, steve. I tried looking for an LLC-type option in my BIOS, but found nothing.

Even more interesting is that on the same board, swapped CPU to earlier Phenom II X6, behavior is opposite: vcore increases at load.

From that, I can only conclude then that behavior you see is pretty much deliberately designed by MSI for BD/PD.

Oh, we have similar boards, right? Mine is the older V1 while yours is the V2 revision?

 

[SlowSpyder]

Same experience with an 8350, steve. I tried looking for an LLC-type option in my BIOS, but found nothing.

Even more interesting is that on the same board, swapped CPU to earlier Phenom II X6, behavior is opposite: vcore increases at load.

From that, I can only conclude then that behavior you see is pretty much deliberately designed by MSI for BD/PD.

Oh, we have similar boards, right? Mine is the older V1 while yours is the V2 revision?

Yessir, the same board other than the version. Doing a little research, I saw someone mention that v2 is just an updated bios for the FX9xxx CPU's. I'm not sure if that is true or not, but something I saw posted on a forum somewhere.

A while back before I built this I think you asked me to look into something on this board, being v2. I'm not sure if maybe it was LLC, do you recall?


I'm taking a slightly different approach now. Since the NB/L3 speed increases seem to net me very little above 2200, I brought that back down to that speed. This let me lower the votage on the NB/L3 to 1.25 volts, but I might be able to go lower yet. My hope is the extra heat and power use of the NB/L3 won't be an issue giving me a little more for the CPU. I'm still tinkering, but I think I might be on a better path.

Here is my Cinemark at 5170MHz with a 2200MHz NB/L3. You can see what CPU-z reads, in the bios I have it set to 1.63xxx volts.

http://www.srcconsulting.net/CPU/FX/5170MHz_Cinemark.jpg

 

[jvroig]

Yeah, I think I asked for LLC and also if the UI in the BIOS now gives you an indication of what the default values are. Mine is crazy, I want to tinker with lots of the knobs, but it doesnt tell me what the default value is for anything so I dont know what sane setting to start on.

 

[SlowSpyder]

Yeah, I think I asked for LLC and also if the UI in the BIOS now gives you an indication of what the default values are. Mine is crazy, I want to tinker with lots of the knobs, but it doesnt tell me what the default value is for anything so I dont know what sane setting to start on.

Same here. I have Auto and a ton of other voltage options and settings. Unfortunately I do not see any factory values listed when I go into any section.

I'm posting at 5.28GHz (24 x 220).

 

[SlowSpyder]

Yeah, I think I asked for LLC and also if the UI in the BIOS now gives you an indication of what the default values are. Mine is crazy, I want to tinker with lots of the knobs, but it doesnt tell me what the default value is for anything so I dont know what sane setting to start on.

I am in AMD Overdrive in Windows. It shows a default voltage of 1.5v for the CPU and 1.1250v for the NB.