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X3 720 => X4 720 | 3.4Ghz => 3.5Ghz

post #1 of 5
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I've been running my X3 720 as X4 720 @ 3.4Ghz for awhile now. However, wanted to know what voltage I should try for 3.5Ghz? Using 1.3250 V for 3.4Ghz at the moment.
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Intel Build
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AMD Build
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CPUMotherboardGraphicsRAM
Intel Q9450 at 3.55Ghz Gigabyte GA-X48-DQ6 Sapphire HD 5770 Vapor-X G.SKILL 8GB 1066 DDR2 
Hard DriveOSPowerCase
WD 640GBs 2-Blue 6-Black Windows 7 Ultimate 64-Bit ABS Tagan BZ800 Antec 900 
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AMD PII X4 720 BE 3.0Ghz BioStar TA790GX 128M Sapphire HD 5770 Crossfire G.SKILL 8GB 1066 DDR2 
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Twin WD Caviar Blue 640GB Windows 7 Ultimate 64-Bit Antec EA650 650W Antec 300 
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post #2 of 5
it's only 100mhz, you can try to up the fsb a notch and see if it's stable.
Else just bump 0.025v at a time and test with prime95.
post #3 of 5
As much voltage as you need.
Keep in mind that the board uses a 3+1 phase, from a review I read about this particular board, the VRMs are known to overheat very easily and can fail as a result. Having a Xiggy DK escalates this issue as the VRMs receive no airflow. You will want to ensure the VRMs are properly cooled before moving forward/upward with the voltage.
post #4 of 5
Quote:
Originally Posted by xd_1771 View Post
As much voltage as you need.
Keep in mind that the board uses a 3+1 phase, from a review I read about this particular board, the VRMs are known to overheat very easily and can fail as a result. Having a Xiggy DK escalates this issue as the VRMs receive no airflow. You will want to ensure the VRMs are properly cooled before moving forward/upward with the voltage.
4+2's have exploded, having a 3+1, I would feel like i'm sitting next to a time bomb.
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post #5 of 5
Actually, most 3+1 actually are not very well ready for quad OC-ing, though I know that in the past this board was a popular choice for unlocking Phenom II x3s.

I would recommend not pushing high voltage, perhaps not even running as quad. There's a big risk involved. This is the techpowerup review I mentioned involving the TA790GX VRMs. They can get easily hot. The particular MOSFET that failed was the third transistor/driver, it is common that an improperly sized driver (i.e. cheaper 3rd transistor as opposed to a proper driver chip) can result in VRM failure due to over-current, whether on Biostar or MSI or even on older Gigabyte designs. The tests in the review were done on an unlocked x2 550 at 3.7Ghz and just 1.41V. Even with MOS-C1 installed, the MOSFET hit max temperature of 72C. That's very hot and starting to approach unsafe levels. Of course, that was an average - the hottest particular ones hit over 85C. That's becoming very unsafe.

The low phase count may also hinder overclocking as it will not provide the most stable power to the CPU (with each FET having more load placed onto it there will be much more fluctuation than on a reliable VRM setup).

Seraphic if you have options to get a different motherboard, it may be a good idea to start looking.
Edited by xd_1771 - 8/12/11 at 4:01pm
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