8350 owners: overclock potential?

[Thick8]

Looking to change out my 1090t. Currently running it at 3.9Ghz with a H50 watercooler. I have a H100 cooler that I purchased awhile back but didn't feel like modding my case to install it. Now thinking about getting the 8350 as it is on sale for $150 but want to know what you guys are clocking it at with water cooling. I don't want the CPU to bottle neck my r9 290 that is on the way.

 

BTW, yes I am an AMD fanboy so I won't be going the Intel/Nvidia route.

Thanks,

John

[trooph]

With good cooling and a bit of luck u will be able to clock it @ 4,8 :) Whats ur mobo?

Btw im not AMD owner right now but i was for long long time :) And i dont regret changing to the blue side :P

Edited May 18, 2014 by trooph

[Thick8]

I'm picking up the Asus Sabertooth 990fx along with the processor. Both on sale at Newegg. They're only $300 for the pair. The r9 290x cost $280. I should be able to get something for my current rig to help offset the cost. I think I can probably get a few hundred bucks fo the MB, CPU, cooler, and 6970.

[BIGNEWY]

I am running a fx8350 with a H40 water cooler nice and cheap, does the job well.

 

Not needed to overclock, handles DCS and everything else great.

[Thick8]

I can't help myself. I overclocked my 386 by 50Mhz when i installed the math co-processor and haven't stopped since.

[SkateZilla]

I'm at 5.15GHz (well 5148 Mhz, 234 FSB x22 MP).

 

Mot of the people I Know get to at least 4.6/4.7 Ghz Minimum.

 

5.0 GHz usually takes a while to tune Voltages, FSB and MP.

 

Also depends on Mobo.

Edited May 18, 2014 by SkateZilla

[Buckeye]

I've got an 8320 with a Hyper Evo 212 cooler (not a water cooler) and I am running stable with good temps at 4.3, with an 8350 4.6 up to 5.0 should be expected (5.0 obviously being lease likely).

[P1KW]

Up easily to 4.7 / 4.8 GHz with liquid cooling, H100, and with the same setup up to 5.0 / 5.1 Ghz (24/7) with 4 cores de-activated, without forcing voltage.

 

Greetings!

Edited May 22, 2014 by P1KW

[Alper22]

Dont expect a stabilised performance at 5.0ghz from FX8350. H100 would be enough to keep it going at 4.8. I am using 8350 aswell with 212x but didnt overclocked it. You dont need too in my opinion. Its just fine enough to run anything for now.

[Thick8]

It came in Thursday and I've had the weekend to play with it. will boot and run at 5Ghz but get some errors in prime95 so I backed it down to 4.9 till I gain some understanding of all the new and improved BIOS settings. Then I'll give it another go.

I hacked my H50 and H100 into a single loop. the 240mm radiators in the front of my Antec 900 case and the H50 is in the back. Looks cool and the thermal margin never goes below 5C during prime95.

John

[SkateZilla]

Dont expect a stabilised performance at 5.0ghz from FX8350. H100 would be enough to keep it going at 4.8. I am using 8350 aswell with 212x but didnt overclocked it. You dont need too in my opinion. Its just fine enough to run anything for now.

 

I run all 8 cores full tilt at 5148 MHz.. on a H100 , and never get anywhere near max temp on either the socket or the cores themselves...

 

Overclocking isnt just, Up the MP, Up the Voltage. All that's gonna do is cause insanely high temps and voltage.

 

Balance between FSB and MP, Example:

I can Put my chip at 200x25 (5GHz) and it will require more voltage and put out higer temps, than what I'm running now, which is 234Mhz x 22 for 5148, uses less voltage, and puts out less heat, and has higher performance rating.

 

You also cant do it on cheap Mainboards w/ Cheap Ram.

[Thick8]

I run all 8 cores full tilt at 5148 MHz.. on a H100 , and never get anywhere near max temp on either the socket or the cores themselves...

 

Overclocking isnt just, Up the MP, Up the Voltage. All that's gonna do is cause insanely high temps and voltage.

 

Balance between FSB and MP, Example:

I can Put my chip at 200x25 (5GHz) and it will require more voltage and put out higer temps, than what I'm running now, which is 234Mhz x 22 for 5148, uses less voltage, and puts out less heat, and has higher performance rating.

 

You also cant do it on cheap Mainboards w/ Cheap Ram.

 

Do you have some screenshots of you BIOS settings? I'm hitting a thermal wall at 4.9ghz. The h50 and h100 radiators cool better than just the h100 by itself but coolant flow is too low. I went ahead and sprung for a swiftech pump/block combo and reservoir to control the temps and would like to see how you got to 5+ ghz

Thanks.

John

[ghostwarior117]

i have a 8350 im doing 4.5GHz @ 1.425V with 1866 ram it runs at 75c @100% load.the other info is under my pc specs

Edited June 11, 2014 by ghostwarior117

[SkateZilla]

I run 1470mV,

Other than having the H100 at it's max setting, and replacing the fans with Higher CFM and Static Pressure fans....

I also Have a Fan on the Back of my Mainboard tray, blowing directly onto the back of the socket, and a Fan mounted to my VRM Heatsink.

 

I think the amount of users running at 5Ghz+ under 1480mV is less than 30..

 

I just got lucky, this chip doesn't require a lot of Voltage...

If I Up to 1500mV, I could prolly hit 5.175/5.2Ghz,

But last time I tried, I was having stability issues, so it would Prolly 1520/1540mV,

Which I'm not comfortable with on a AIO Loop.

And the performance difference was less than 1% while the power draw was a bit more.

[ghostwarior117]

is 234Mhz you cpu bus frequency?

[SkateZilla]

234*22@1470mV, with some other adjustments to Ram clock, Timings, Dimm voltage and IMC Voltage.

 

But those are advanced settings that shouldn't be touched until your CPU is stable first.

 

I know alot of users that cant even get 4.6 GHz @ 1470mV

Edited June 11, 2014 by SkateZilla
Edit Typo

[ghostwarior117]

edit im doing a test now 4.6 @1470mV

(234mhz x20)

Edited June 11, 2014 by ghostwarior117

[SkateZilla]

4.0 GHz is stock speed for the FX8350.

 

i meant to say I know alot of users that cant get to 4.6 GHz @ 1470mV...

[ghostwarior117]

edit looks like my eighth and seventh cores is not stable @4.6 :(

i will have to play with the mV and MP

Edited June 11, 2014 by ghostwarior117

[SkateZilla]

well 1.470mV seems to be cooler then 1.425mV for some reason

 

it depends on what the CPU is actually drawing.

 

im my experience, you can set 1470mV and if your CPU is still running lower clocks it will just spool the vCore down.

(provided the bios features are on that allow dynamic vCore adjustments)

 

But as a Base, in my experience, 200x20 for 4000MHz uses more power than 230x17.5 would.

the issue with cranking up the Bus, is not all devices/components can handle it,

 

Which is why it doesn't work very well on budget/cheap mainboards, w/ Cheap/Budget RAM. etc.

 

Upping the FSB and Lowing the Multiplier allows for a Higher Bandwidth on the Memory and HTT.

 

There's Several "Guides" on Overclock.net for FX8350s on various mainboards.

 

for FX CPU's I wouldn't go above 58 Core, 62 Package, 70 Socket.

Edited June 11, 2014 by SkateZilla

[ghostwarior117]

umm just lower my MP TO 19.5(4.58GHz) and looks stable

[Thick8]

I also Have a Fan on the Back of my Mainboard tray, blowing directly onto the back of the socket, and a Fan mounted to my VRM Heatsink.

 

Is the fan blowing on the tray or did you cut the tray to expose the back of the motherboard? I have a low speed/high cfm fan. What are your loaded temps with the fan on/off?

John

[SkateZilla]

Is the fan blowing on the tray or did you cut the tray to expose the back of the motherboard? I have a low speed/high cfm fan. What are your loaded temps with the fan on/off?

John

 

My Mainboard tray has a gap about 119mm x 119mm, the 120mm slim fan barely fits on it, and is secured with duct tape. 1200 RPM 45 CFM that blows on the back of the socket and throughout the back of the mainboard.

 

Socket temp is about 7 Degrees Celsius Cooler under load.

[ghostwarior117]

so after play around with overclocking i found

 

240x20 @ 1.475mV (stable but mem was @1279MHz)

 

is there a recommend bus speed i should not go over i know my mobo say max 600? and then to get my mem back to 1600MHz or 1866MHz should i overclock or underclock the mem?

[SkateZilla]

so after play around with overclocking i found

 

240x20 @ 1.475mV (stable but mem was @1279MHz)

 

is there a recommend bus speed i should not go over i know my mobo say max 600? and then to get my mem back to 1600MHz or 1866MHz should i overclock or underclock the mem?

 

I wouldnt go too much higher.

 

Also this should help:

http://www.overclock.net/t/1348623/amd-bulldozer-and-piledriver-overclocking-guide-asus-motherboard