I'm planning on getting the amd fx-8350, Asus M5A99FX PRO R2.0 ATX AM3+ Motherboard with the Corsair H100i Liquid Cooler and I'm wondering what voltage should I set it to if I want to overclock this chip to 4.4Ghz?
Well it really depends on your particular CPU. Some will need less voltage some will need more. Just start raising it slowly until you get it stable.
Mine went 4.4 on stock at 4.6 had to start boosting it. Each chip will vary a bit as DerKrieger has said.
thanks for the reply, how will I know when it's stable? Is there a program to test it?
AIDA64 has a good stress test.
Some people still use Prime95 but I wouldn't recommend that. It can cause the CPU to actually draw more voltage than you set and damage it. PLus if you have a newer Intel CPU it will start to throttle.
it should do that easy at stock voltage
mine went to 4.5 on stock
posted fine at 5ghz bit froze at stock so i just ramped it up to 1.485 and ran stable mostly
pushed it to 5.2ghz and had to ramp it up to 1.525 volts for stability
wasnt game to push further and in the end decided to run at 5ghz
here are my results and i also use the h100i
benchmarks:
3DMark: firestrike http://www.3dmark.com/fs/2657079
firestrike extreme:http://www.3dmark.com/fs/2592459 & http://www.3dmark.com/fs/2657199
yeah thats right faster than a overclocked 9590 and 2 290's http://www.3dmark.com/search?_ga=1.193209389.1469297704.1408868887#/?mod... FX-9590&gpuName=AMD Radeon R9 290
passmark 5.19ghz: http://www.passmark.com/baselines/V8/display.php?id=19938520720
passmark 5.07ghz: http://www.passmark.com/baselines/V8/display.php?id=28116952153
As others have said, it is specific to your CPU/Motherboard/Cooling combination. Now, what I mean by this, is that someone else could have an FX-8350 and the same Asus board as you, and see different results.
To get what you want out of this CPU requires some decent trail and error, however, 4.4GHz is a reasonably decent target to aim for as an initial overclock.
I wrote a a tutorial on overclock.net that walks you through how to do what you're asking, I have a simplified version linked here: http://systemtuner.weebly.com/how-to-overclock-an-amd-cpu.html I also have all the links to diagnostic and test tools on that site. Because you have a black edition CPU, I'd recommend checking out my memory controller tuning guide: http://systemtuner.weebly.com/how-to-tune-an-amd-cpu-for-performance.htm
It's important to note, that with AMD (unlike Intel) you actually get better performance clock for clock in games by increasing the speed of your memory controller and tightening your RAM timings as opposed to solely increasing your CPU clock. (usually) That's why I linked that second guide.
On my personal setup, I leave my 8350 at the stock 4.1GHz (at 1.27v) but I increased the speed of my NB to 2.6GHz. I find that using this setup, I have more than enough horsepower for everything, including gaming+streaming.
If you have more questions/run into problems, just reply to this post.
First try it at stock or (auto) voltage. I got my FX8320 oc'ed from 3.5ghz to 4.2ghz on (auto) voltage. If that dont work bump it up by very small increments like .025v at a time. Make sure you DISABLE TURBO BOOST when oc'ing. Also leave your cpu/nb frequency and HT link speed on auto. Changing it from 2000, 2200, or 2600 won't make any noticeable difference in performance.
My friend got his FX8350 to 4.8ghz on 1.38v which is not much above the stock voltage. Can't say all FX chips will do this though.
I'm currently running my FX8350 at ~4.52. stock volts. 212EVO @ 1400 RPM, never goes over 40c
FX chips are wonderful pieces of hardware.
Most people don't need to go above around 1.45V to get 4.4GHz but make sure turbo core is disabled but like these nice gentlemen said try using AIDA64 as a stress test if you can.
PM Mystery Angel ... she knows all about the FX 8350 ... she has one currently and is an expert pc adnin as well as one of the most helpful Tek Syndicate website moderators. I am positive that she will give good advice.
With air cooling (Noctua NH-U14s) I was sitting on 4.7gHz @ 1.43v stable, temps would get up into the 50's.
Just installed my XSPC loop 'kit' yesterday. Now sitting on 5.0gHz @ 1.54v, temps get up to mid 50's in AIDA64.
A good place to start for overclocking (imo) is-->
http://rog.asus.com/216552013/crosshair-motherboards/guide-overclocking-fx-8350-to-4-8ghz-on-crosshair-v-formula-z/
Trial and error is also good for learning the limits of your setup.
It's been a while since I overclocked AMD but isn't FSB overclocking still a thing?
So this is how it went...
Three things to overclock the RAM the CPU and the motherboard via the FSB.
Just setting the CPU multiplier high misses a whole load of goodness that can be gained by overclocking the motherboard.
Motherboard overclocking, set the CPU and RAM multipliers low. Bump the FSB in little steps higher and higher until instability. (FSB in excess of 300MHz was not unusual, had one board that would do 350MHz!)
OK then the same with the RAM, set the CPU and FSB low to discover the limit of the RAM. (don't forget to set the RAM timings manually (auto is evil))
Then you do the CPU, but first undervolt going down with the voltage to discover how well you did in the silicon lottery. (Auto voltage is evil) once you are done with the undervolting this become your new starting point for CPU overclocking. Take that to the limit of stability with the multiplier.
So now you know several things. How low a stable voltage your CPU needs at stock. How fast you CPU will go in GHz at what voltage. How fast your motherboard will run also how fast the RAM will go. Then you have to break out the calculator to find what FSB with what CPU multiplier and RAM speed to get the best overall performance out of your system.
So if your FSB caps out at 300 you will need your CPU multiplier at 15 to get 4.5GHz rather than the 22.5X at the stock FSB of 200
Just overclocking the CPU in isolation is an Intel thing, AMD is a whole different thing. There is more to system performance than just how many calculations your CPU do. It's also about how fast the information gets around the board and for that you need to look at the FSB.
I can get it to 4.4 at stock on my GA-990FX-UD3