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CPU VDDA Voltage AsRock 880g

post #1 of 4
Thread Starter 
Ok, so I ordered my new Phenom II x4 970 today from Newegg applaud.gif so I am playing around with the O.C. on my PHII x3 740 for the last little bit tonight, right now I am testing it @ 1.538v set in bios and under load in windows via CPUz it is running @ 1.56v. Is this safe?
I had to set my CPU VDDA voltage to 2.70v in the bios to get this sable ( 15 min prime 95 x64 so far ) with a 18.5 multi and the option for the VDDA voltage in the Bios are : "Auto, 2.56, and 2.70". My question is what does this voltage change? Will running it at the "maximum" 2.70 volt burn anything up ie : the chip or my Mobo? Any input would be much appreciated as the search bar did not come up with much
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post #2 of 4
Give this a good reading. http://www.overclock.net/amd-motherboards/762641-voltages-whats-what-what-they-mean.html
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post #3 of 4
Thread Starter 
I did read through some of that, but I didn't see what actually does, or if the maximum voltage of 2.70 is safe. that chip is going into my Gf's computer when my new PHII 970 arrives and I will prob sell my PHII x2 555 that she has now. I just want to know what the max O.C. is on PHII 740. Right now 3.7 Ghz seem to be the limit @ 1.56 volt as an x3, and 3.2 Ghz @ stock 1.35 volt as an x4 ( 4th core is way week )

Edit : so the CPU VDDA is on the processor itself? Not on the motherboard? I don't want to set something to high and fry my board. That would really suck
Edited by Mrniceguy8211 - 4/13/11 at 5:12pm
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post #4 of 4
Quote:
Originally Posted by Mrniceguy8211;13115440 
I did read through some of that, but I didn't see what actually does, or if the maximum voltage of 2.70 is safe. that chip is going into my Gf's computer when my new PHII 970 arrives and I will prob sell my PHII x2 555 that she has now. I just want to know what the max O.C. is on PHII 740. Right now 3.7 Ghz seem to be the limit @ 1.56 volt as an x3, and 3.2 Ghz @ stock 1.35 volt as an x4 ( 4th core is way week )

Edit : so the CPU VDDA is on the processor itself? Not on the motherboard? I don't want to set something to high and fry my board. That would really suck

As far as Ive seen regarding the PHII x3 740 OC, I'd say your right in line with getting 3.7GHz as x3 and 3.2 for the quad. I don't remember reading the x3's being that great of an OC'er.

CPU VDDA the way I understand it is for the CPU yes, but controlled by the mobo. It's used for extreme OC voltage as a final tweaking tool. Under most cases adjustment is not commonly used even at OC above 4.2GHz. More for those DICE and LN2 setups where truly extreme voltages can be used. Not for us on air or water cooling.

If you haven't seen this thread http://www.overclock.net/10264479-post27.html it explains it with even more detail but it's still a hard one to totally understand without a degree lol. I can understand most of it but... lol.

Here is still one last thread to check out as you go about pushing the PH II x4 970 OC http://www.overclock.net/amd-motherboards/946407-amd-motherboard-power-phase-list.html
This shows your mobo as being suggested to use caution with voltage while staying with a 125w CPU even thou the board is rated for 140w. Not saying anything bad about your mobo at all, just understand the limits you might place on it if you get too crazy with the voltage while running the 970. The only reason I mention this to you is because you said you didn't want to fry anything and I'm just pointing out there may be a chance of damaging the mobo if you try for a 4.2 with 1.55v Vcore lol. I would think you could get a 4.0HGz without too much trouble on your current setup and not have to over do the voltage.

Hope this helps to answer some of your questions at least.
Good luck, and have fun!
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Bruce
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CPUMotherboardGraphicsRAM
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Samsung 960 EVO NVMe Samsung 840 SSD Corsair GT SSD WD 2TB Black 
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WD 4TB Red EK-FB Asus C6H Monoblock XSPC GPU Razor WB XSPC RX 360 
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OSMonitorPowerCase
Win 10 Pro Asus VE248H x2 EVGA 850 G2 Xigmatek Elysium 
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Samsung 840 Pro WD20EFRX 64M Red x4 raid 10 WD5001AALS Blk Asus DRW-24B1ST 
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