Your kingston memory spec sheet is wonderful and stimulating, but that isn't getting that RAM working. The CPU is compatible with this motherboard and has Vcore 1.02V, the PCH has power 1.8V, 1.06V, 3.3V.Ovbiously there is a memory parity error for the boot process to be interrupted with a blue screen of PC social disease. So does the PCH start the PLL and why does it need the PLL?Ĭan anyone of you guys help untangle my brain so I can understand what is (or should be) going on here? H57 Chipset The PLL drives the PCH clock (PCH, PCH DMI, PCH SATA, PCH VGA) but the PCH has it's own Xtal 25MHz. To be honest there are too many gaps in my knowledge here and that is why I am struggling.
The only way I can think that data could be clocked into the the RS4180BL would be if the PCH did it, as that has it's own 25HMz crystal (which is oscillating though only about 25mV high unless my scope is not too good at that frequency) I had a look on my scope but I can't see anything happen at power on - they just go from low to high and stay there Those two are 23 SCLK and 24 SDATA - Now this is an assumption but it seems possible that these clock data into internal configuration registers in the RS4180BL and thus enable the PLL. On my board I can't see any physical jumpers for this so I guess it must be hardwired but anywayįSLA 1.06V FSLB 0V FSLC 0V = 1 0 0 so it all makes sense.Īll the other pins are either 3.3V power, Ground or clock outputs, apart from two. The jumpers select between Ground and PCH_1P05V. Those signals FSLA, FSLB, FSLC come from jumpers on the motherboard that set the Bus speed to 133MHz/100MHz The schematic you gave me for this chip is taken from the correct motherboard H57H-AM2. I need to know where that FSLA signal on pin 4 is coming from or going to, what it is, and whether 1.06V is incorrect. I think my soldering is OK, please see pics and check it. Here is what I have (Low - 0V, High = 3.3V) The other pins seem to make sense all bar one which is at 1.06V The Xtal is oscillating but I have no clock signals generated. Looking at the RS4180 I now have CK3V and CK3VA at 3.3V.
I thought I had already replaced this before but I left it on one side for a long time, so I could be wrongĪnyway I fitted a replacement (new), but the motherboard will still not boot up. The short was the RS4180 itself - I traced it back to the FET or LDO that powers the PLL, and when I powered the motherboard up I got a bit of smoke from the PLL chip. OK Mon2 Thanks for the datasheet - it helped to some extent.
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