Jetway poverty-pack cheap crap mainboards
I went to a clearance sale at a computer store.
There I bought a Jetway mainboard, new still in box for $5. It is AM3 and I had a few CPUs I could put in it. The specs on Jetway website stated it supported quad-core up to 95W. HOWEVER, at the back of the manual is an addendum imploring user to to run a CPU drawing more than 65W, as it has only 3-phase power and MOSFETs may be cooked. No wonder it had been sitting unsold for years. Not a bargain after all! |
Jetway poverty-pack cheap crap mainboards
wrote:
I went to a clearance sale at a computer store. There I bought a Jetway mainboard, new still in box for $5. It is AM3 and I had a few CPUs I could put in it. The specs on Jetway website stated it supported quad-core up to 95W. HOWEVER, at the back of the manual is an addendum imploring user to to run a CPU drawing more than 65W, as it has only 3-phase power and MOSFETs may be cooked. No wonder it had been sitting unsold for years. Not a bargain after all! I wonder if the board is from this generation ? Year 2008. ******* "AMD 780G Goes Boom" http://www.anandtech.com/show/2496/2 "we lost four of our seven boards during final benchmark sessions this past week" http://www.anandtech.com/show/3380 "The problems revolve around the capability of current designs to properly handle the 125W TDP processors at stock settings or when overclocked." ******* On the one hand, the CPU Support table hints at the power handling capabilities of the motherboards. But the fact that the generation of motherboards seemed to share that "cheapness", suggests AMD put them up to it. Like "why don't you guys make some $50 motherboards, so we can crush Intel". It's possible, even running 65W processors, the Vcore regulator would end up running hot. I think in the next generation, some of the marketing materials started mentioning "140W" capability, which was the manufacturers trying to cover their asses after the previous generation screwup. (See? It's a feature now... "Board no go boom") http://event.asus.com/mb/140w/ I have this problem right now on a new motherboard. Cheesy little heatsink on VCore regulator. Run Prime95 on the processor (board rated to take that processor), CPU at stock speed, and the heatsink is too hot to touch. Meaning it is running 65C or a bit more. I had to fit a fan to try to cool it off a bit. One reason why VCore should not run that hot, is because MOSFETs are subject to thermal runaway. The channel resistance goes up with temperature, and when the resistance goes up, the MOSFET gets hotter still. As a consequence, I like my heatsinks to not be very hot. It there was no chance of thermal runaway, or there was a thermistor to shut off the machine, I wouldn't mind this kind of thing so much. I would not be happy if it burned. Paul |
Jetway poverty-pack cheap crap mainboards
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