Is it even possible that my FX-8320E CPU is such bad of a sample that it can barely reach a stable 3.9 GHz overclock with a voltage of 1.28 V?
I have a MSI 990FXA Gaming motherboard with supported Corsair Vengence PRO RAM, but not with a supported be quiet! 80+ Bronze 1000W PSU. My GPU is a Dual Core R9 290X2 that has a minimum system power requirement of a 1000W and uses max ~700W itself, which doesn't leave much for the other components. Could an under powered rig increase the required voltage to overclock a CPU? Because I can barely get a stable clock of 3.9 GHz with temps below 60 degrees with 1.28V. And if I want to increase it to 4 GHz, I would need to add another 0.04V. And to get closest to a stable 4.1, I would need to add around ANOTHER +0.06 V?? Which is about 1.38 V.
Is it possible that they screwed up so badly with their testing process or could my PC be the fault?
It is possible yes, though you are trying to OC a processor which is binned and tuned for lower voltage and operating frequency, quite possibly a binned 8350 chip, which takes 1.38v to hit 4.6ghz. If you're hitting 60°C then your cooler is crap and needs to be upgraded anyway, as an overclocked processor is much more affected by heat. Overclocking is always a crapshoot as to how much you can get.
The 290X2 has a TDP of 580watts when running CrossFire. Single GPU usage should be just over half. So when you have set your overclock and boot into windows, GPU1 will be off until you play a CrossFire game. So unless the overclock is only failing when your doing both CPU and GPU stress testing I wouldn't worry about it.
We need the model of the MSI mobo, its possible its not made for overclocking. Or is made to only scratch the surface.
Depending on how your overclocking, using the bus or multiplier, you might need to push the voltage of other components like the CPU/NB.
Your voltages seem fairly normal, 1.38v for 4.1GHz is good. Your CPU will go upto 1.5v if you needed. Does your mobo come with LLC or any other voltage droop sorting type thing?
It is possible you have a lower than expected overclocking CPU. But they are sold at 3.2GHz with a bonus if you can get it to overclock.
AMD FX 8320E processor review - Overclocking With AMD FX to get an idea of your CPU, but you will still need to test 20 minutes at a time and doing the usual voltage up when CPU failed 20 minutes again thing as all CPUs are completely different.
See how you get on...
The temps seem a bit too high as well for a not so high of a clock. But I have a decent cooler, I presume. A be quiet! Dark Rock 3. Right? :/
I also changed the paste just yesterday. Still got the same results. I put the same paste that the cooler came with, and it's supposed to be a very good non conductive paste. I know that conductive pastes give better results, but I've been afraid that I'll screw something up. I'll actually test it soon, kind of don't care anymore.
Right, how stupid of me. I'm only doing a CPU stress test, lol.
The model of the mobo actually is: 990FXA GAMING | MSI Global | Motherboard - The world leader in motherboard design .
I'm using the multiplier. I tried the bus as well, but same results. How much should I increase the NB voltage, or is there a way to test with trial and error? And the thing is that I can't even get a stable 4 GHz. But you gave some great ideas to try out now.
And another thing, if you don't mind. In my bios my HT Link frequency is set to 2600, and the CPU-NB to 2200 and says that the NB frequency should be greater or equal to the HT Link speed. So should I just turn the NB frequency up or meet them somewhere between?
Ahh good, a proper mobo.
Leave the mobo NB as it is, I think 1.2 or 1.8. CPU/NB ideally between 1.25 to 1.3v.
HT and NB, yet ideally the same but not necessary or beneficial.
How far on stock voltage will she go before you get a fail in Prime or OCCT or whatever your using to test?
I don't believe that you have a "bad" CPU. At 4.0 GHz. you're looking at a 25% OC. The link below shows that to reach the Turbo 4 GHz. mode the CPU requires 1.4125v. I'd expect your CPU to require similar voltage in manual mode to run stable at 4.0 GHz. If it's P95 stable at 1.38v then you are doing very well and have a very good CPU.
There are many BIOS settings that impact OC'ing results and every CPU, mobo, RAM, etc. are different. With the FX-8350 I found HT = 1.25v, 2600 MHz.; 1.35v CPU-NB, 2600 MHz; 1.437v vcore to work well @ 4.7 GHz. for many but your results are likely to vary as there is no exact settings that work for all CPUs.
Keep an eye on your core temp as 61C under full load is the user max operating temp for the FX-8xxx series CPUs. The Box cooler was intended for a 95w low power CPU running at 3.2 GHz. A tower cooler will drop the temps considerably and is recommended if you're running close to 60C often.
Well, I'm confused. At first, it really seemed like +0.10v to the RAM helped. I got to a stable 4.1 GHz with 1.37v for 15 min before I stopped Prime. Then I upped the CPU-NB to 1.27v, and it failed after 2 min. I put the CPU-NB voltage back to auto, and it failed after 3 min. This time, I cranked it up to 1.3v, and it failed after 7 min. This doesn't make any sense. I hit the 61 Celsius mark at 1.37v/4.1GHz anyway, so I guess I should test better thermal compound. Extra 100Hz isn't worth the +0.6v anyway. So I guess I'll just settle with 3.9GHz or 4.0GHz. Upping the RAM voltage could be useful tho.
Prime95 and I get 3.5GHz with the stock voltage.
AMD FX-8320E Overclocking, Test Setup, Power Consumption - AMD FX-8320E CPU Review: The Other 95W Vi... -Just to see that this guy got 4.5 out of 1.37v while I get an unstable 4.1 drives me insane.
Thanks for the help.
I guess you're right. I didn't think that it would need so much more voltage. I always saw these crazy overclockings where they get up to 4.7GHz with these low voltages and felt like I was being robbed. There are probably worse copies out there.
I feel relieved. I'm happy now. Thanks.
I think when you set it back to auto it stays at the same or similar voltage. RAM has driven me nuts in the past using the bus.
As for the AnandTech, they likely got a great sample. I don't know for sure of course but I think them, Linus, all of these journalists get pre tested hardware that the manufacture knows will impress.
As your on water, it might be worth making sure your CPU VRMs are doing okay. Now you have little air flow over these components.
It sounds like you have salt fever, but it seems you have a fair overclock. If it eases your mind I have a 25% overclock now, yet crave for more. You may even be able to pick up a 8350 in the future, then your on higher ground to start with.