Issue with Core i7 3820 multiplier lock
Issue with Core i7 3820 multiplier lock
The core i7 3820's multiplier in the Evga Eleit utility can reach up to 60, while the EVGA X79 FW BIOS has no such limit. However, setting the multiplier above 36 locks it at 36 and restricts frequency to a maximum of 3.6 GHz unless you adjust the BCLK frequency, which often causes crashes. It operates fairly cool between 20–30°C, so there are no major issues. Any suggestions?
ujrkingdom :
Sorry for not reading this post sooner, my bad; so, for some reason my bclk, i set the multiplier at 1.25 like you said but whenever i go into my bios and whenever i look at the eleet tool it always presents my bclk at 100 mhz even though i upped the multiplier so currently i have my multiplier set at 43 for my cpu and eleet says it's at 4.3 ghz which is what i expected but, is it possible that its not actually 4.3 ghz and that its actually running at 5.375 ghz (i know its high but maybe somehow the bclk is actually at 125 mhz even though it says its at 100 mhz)? Now i'm just speculating so, could you tell me if this is possible for my bclk or how i can fix my bclk setting?
AHAHAHA. Yea, i ran into the issue too. The problem is...
Not sure about the 3820 but if it's not a K addition, the multipliers are fixed. Sometimes in the bios and overclocking tools it still lists the higher multipliers, but when you try to adjust them, it picks the maximum your CPU can support (for instance on my i5 2400 I could pick 40x, but it will automatically set it to 36x).
Yeah, this specific i7 has a partially unlocked multiplier capped at 43, while mine doesn’t reach that level even though I’ve looked into many blogs and forums. I’m confused about why others can boost their multiplier but not me. Could it be related to the motherboard’s CPU support?
The i7-3820 isn't a fully unlocked CPU because it lacks the K, X, or Y after the model number. It's a partially unlocked one, limiting its speed to a set multiplier; beyond that, you'll need to overclock using BCLK and voltage adjustments. The best approach is to search online for an overclocking guide specific to the 3820 for detailed instructions.
I have the same motherboard, but it has its own issues.
Hmm... let's take a look...
I never managed to get Eleet running; it crashes frequently and sometimes just fails entirely.
However, you can adjust the multiplier in the BIOS manually.
If you really aim for serious overclocking, enter BIOS, avoid enabling OC mode (it's not ideal), because your PSU isn't suited for OC. If you have a high-end 850W+ or a silver standard 1200W+, you might try it, but it's not recommended. Turning off too many components I need is a problem.
Then, if you're sure Eleet will function, enable it and adjust a few settings.
Change everything except PLL and the setting right below to manual. Enter BCLK settings and pick x1.25 (don't go higher unless you have liquid nitrogen on hand). Set the multiplier to manual and choose 36. There are reports of stable x39 multipliers at around 1.38V Vcore, but it hasn't worked perfectly for me. Proceed and let me know if it succeeds. My VCCIO is set to 1050 mV (default) and VSA to 1150 (which is 100 below the default). These are very low values—feel free to increase them, but not beyond 1300 and definitely not above 1400.
To be safe, I usually set PLL to 1.8 manual, though this might not be necessary. By the way, my RAM is rated at 1.5V and it's already in manual mode, so if your RAM differs, you may need to adjust VSA/VCCIO.
Finally, go to the save area and select "save and RESET." Occasionally I run into issues if I just exit without saving. If your CPU gets hot at this stage, it might not start again. Wait a minute or two, then press power again. It should boot up, POST may take a while, but eventually it should succeed.
-rmanne
p.s. if this works for you, could you share your results? If you reach 4.875 with multiplier 39, feel free to post your voltages—I'm still having trouble getting it to function well.
And if it doesn't work, please mention your error code. I might be able to assist. In the past week, fixing my PC has consumed more time than actually improving it, and I already know most error codes from memory.
Sorry for the delay in reviewing this post; my mistake. I adjusted the multiplier to 1.25 as instructed, but when checking the BIOS and using the Elett tool, it still shows a BCLK of 100 MHz even though I increased the multiplier. My CPU is set to 43, and Elett reports 4.3 GHz, which matches my expectations. However, I’m wondering if this might not be accurate—could it actually be running at 5.375 GHz instead? It’s possible the BCLK could be lower, like 125 MHz, despite the display showing 100 MHz. I’m just guessing. Could you confirm whether this is correct for my setup? Also, please ignore any concerns about temperatures; I have a Thermaltake Water Pro 2.0 liquid CPU cooler, and my temps stay below 40°C under load.
Here are the pictures of my current configuration:
http://puu.sh/2ULTG/e0bb7d79ab.png
http://puu.sh/2ULT4/9d0cfd10c5.png
http://puu.sh/2ULSu/792d054bef.png
http://puu.sh/2ULS2/73ed1ffd42.png
http://puu.sh/2ULRk/6a30b600c4.png
ujrkingdom :
Sorry for not reading this post sooner, my bad; so, for some reason my bclk, i set the multiplier at 1.25 like you said but whenever i go into my bios and whenever i look at the eleet tool it always presents my bclk at 100 mhz even though i upped the multiplier so currently i have my multiplier set at 43 for my cpu and eleet says it's at 4.3 ghz which is what i expected but, is it possible that its not actually 4.3 ghz and that its actually running at 5.375 ghz (i know its high but maybe somehow the bclk is actually at 125 mhz even though it says its at 100 mhz)? Now i'm just speculating so, could you tell me if this is possible for my bclk or how i can fix my bclk setting?
AHAHAHA. Yea, i ran into the issue too. The problem is with the intel chipset this time. However, there is a very easy fix to it: after you are done changing the settings on the BIOS, save, exit, reboot. Then, when it is about to boot up, go into BIOS again, you have to use "Save and Reset", not Save and exit or anything else. This will make the bios settings Then, you will notice it taking a little longer to boot, but this time, the baseclock is correct. Now, everytime you reboot, you will notice your computer shutting down immediately after you hit the power, and then it will reboot by itself and work properly this time. This is Intel's chipset syncing itself (yea, what a pain). And trust me, I have a thermaltake water 2.0 pro, and you will have issues clocking past 5GHz stably without overheating your system (tho, i did get 5GHz unstable overheating once).
Just sayin, CPU-Z doesn't lie and Eleet is based off of CPU-Z, so evga is actually right for once
😀
Have fun!
The i7-3820 isn't a fully unlocked CPU since it lacks the K, X, or Y after the model number. It's a partially unlocked one and will only reach certain limits before needing overclocking with BCLK adjustments and voltage changes. The best approach is to search online for an overclocking guide that provides detailed, step-by-step instructions.