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AMD Phenom 555 BE (unlocked) on MSI 870A-G54 (AMD 870) - Page 2

post #11 of 24
No.
Your mosfets are hotter than you think. People with quad cores/hexa-cores on this exact same board have seen sparks coming from the mosfets area. There have also been examples of mosfets catching fire on this board as well as other MSI boards with similar power phases that are additionally heatsinked.
post #12 of 24
Is my Gigabyte MA785GM-US2H (also a board with 4+1 phase configuration) at all likely to have thermal/fire issues? I've been running an (unlocked) quad on this board with an H50, up to several days at a time.
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post #13 of 24
Gigabyte power phases are worlds better than MSI.
Just make sure you're using the stock c--wait a minute, you're not
Yep, down your clocks to be safe, or install mosfet heatsinks such as the MOS-C1. You can probably run a slight overclock if you have proper mosfet cooling on the 785GM-US2H and x4 B55.

Failures usually happen over time or immediately during long stress tests or periods of 100% load.
post #14 of 24
Thread Starter 
I have changed to 2 cores. You scared me enough!
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post #15 of 24
Quote:
Originally Posted by nibnab;12072600 
Hey guys! Noob here :-)

Current spec:

CPU: AMD Phenom II 555 BE (unlocked to 4 cores) @ 3.8GHz
CPU Multiplier @ 19 x FSB: 200
HT Link @ 2000Mhz
CPU-NB @ 2000Mhz
Mobo: MSI 870A-G54 AMD 870 (Socket AM3)
RAM: 8GB OCZ (4x2GB) 1333MHz DDR3 @ 9-9-9-20

All voltages on auto

Does this look good? Any way of getting some more juice out of this setup?

Any help would be really really appreciated :-)

43227spec.png

Does the 555 run at a different vcore than the 560? My stock is 1.35v, I can't see how he got 3.8 on less than stock. I'm assuming the 555 runs at lower voltage.
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post #16 of 24
Sorry for the scare there but I guess it's better safe than sorry. I'm planning to do a big write up article about why you should pair important high TDP CPUs with more reliable motherboards so that this doesn't become an issue anymore and people know what motherboard to choose.

When I said stock c-- I meant stock cooler; if ever running a 4+1 with a 125W processor, you should use the stock cooler. Remember that motherboards usually only ever rate for proper CPU/power phase operation if at stock speed and using the stock cooler. This is because the stock cooler blows onto the mosfets. This can be safe up to a certain point (i.e. you use a different cooler, push the clocks & voltage, or both). The problem is much less imminent with a better, more spread out and cooler power phase.
Edited by xd_1771 - 1/21/11 at 5:01pm
post #17 of 24
Thread Starter 
Quote:
Originally Posted by xd_1771;12094296 
Sorry for the scare there but I guess it's better safe than sorry. I'm planning to do a big write up article about why you should pair important high TDP CPUs with more reliable motherboards so that this doesn't become an issue anymore and people know what motherboard to choose.

When I said stock c-- I meant stock cooler; if ever running a 4+1 with a 125W processor, you should use the stock cooler. Remember that motherboards usually only ever rate for proper CPU/power phase operation if at stock speed and using the stock cooler. This is because the stock cooler blows onto the mosfets. This can be safe up to a certain point (i.e. you use a different cooler, push the clocks & voltage, or both). The problem is much less imminent with a better, more spread out and cooler power phase.

I've ordered 20 MOSFET heatsinks (enzotech mos-c1). Do you know how much I will be able to overclock to with these additional heatsinks?
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post #18 of 24
Is there a tutorial on where all the mosfets are located on this board? I just built my first computer in 10 years (I think before mosfets were popular), and I want to cover my bases when overclocking the Phenom II 560 BE.
post #19 of 24
Quote:
Originally Posted by drexvil;12687280 
Is there a tutorial on where all the mosfets are located on this board? I just built my first computer in 10 years (I think before mosfets were popular), and I want to cover my bases when overclocking the Phenom II 560 BE.

msi_voltage_regulators.jpg

Little black squares next to the capacitors located right by the cpu socket.
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post #20 of 24
Quote:
Originally Posted by Tw34k;12687364 
msi_voltage_regulators.jpg

Little black squares next to the capacitors located right by the cpu socket.

Thanks, the picture helps a lot. In total I counted 24. Is it a good idea to put heatsinks on all of them, or just the ones by the capacitors you pictured?

14 by the capacitors (near Chokes 2,4,5,7,8)
1 next to SYSFAN1 lettering
3 near the blue RAM slots (by Chokes 3,6)
4 near the black RAM slots (by Chokes 9,10)
1 near the IDE connector
1 next to the CMOS clear jumper
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