What Gigabyte implemented OEM
· CPU VRM Input bank: 5x Choyo ?? 25V 330uF ESR= ??, Ripple= ?? => Combined: 1650uF , ESR= ??, Ripple= ??
· CPU VRM Output bank: 6x Choyo ?? 25V 330uF ESR= ??, Ripple= ?? => Combined: 1980uF , ESR = ??, Ripple= ??
^ The 25V rating is completely unnecessary. On this board the CPU VRM Input caps work at 5V; the output caps work at 1.3 ~ 3.5V . Replacement caps rated at 6.3V will be fine here.
The ESR of those Choyo crapacitors is anyone's guess.
Gigabyte left two spots unpopulated in the output bank (12 & 13 are in parallel to 6~11).
.
What here your servant perpetrated
In this board the CPU VRM caps are located in close proximity to the CPU socket, where they will interfere with relatively large CPU heatsinks. So I went for low-height SMD polymer caps, hacked to make them functionally thru-hole, as per this trick.
· VRM Input Bank ( 1 · 2 · 3 · 4 · 5 )
1) Panasonic SVPT · 6.3V · 820uF · 8x12mm · ESR= 12 mΩ · Ripple= 4700 · 20000h · 6SVPT820M
2) Panasonic SVPT · 6.3V · 820uF · 8x12mm · ESR= 12 mΩ · Ripple= 4700 · 20000h · 6SVPT820M
^ Well that was the idea, but then this happened:
^ I broke the legs of this SMD poly cap with my useless paws while extracting the plastic tab. Et merde (pardon my French).
Note to self:
To not leave the board dry-docked, I had to improvise with what else I had around, so this little lytic Panny FR will have to stick out there like a sore thumb for a while:
2) Panasonic FR · 6.3V · 1000uF · 8x12mm · ESR= 56 mΩ · R= 950 · 6000h · EEUFR0J102
Recap continued as planned without further mishaps ...
3) Panasonic SVPT · 6.3V · 820uF · 8x12mm · ESR= 12 mΩ · Ripple= 4700 · 20000h · 6SVPT820M
4) Chemi-Con NPCAP PXE · 6.3V · 820uF · 10x8mm · ESR= 14 mΩ · Ripple= 4300 · 15000h · APXE6R3ARA821MJ80G
5) Chemi-Con NPCAP PXE · 6.3V · 820uF · 10x8mm · ESR= 14 mΩ · Ripple= 4300 · 15000h · APXE6R3ARA821MJ80G
· VRM Output Bank ( 6 · 7 · 8 · 9 · 10 · 11 · 12 · 13 )
6) Chemi-Con NPCAP PXE · 6.3V · 820uF · 10x8mm · ESR= 14 mΩ · Ripple= 4300 · 15000h · APXE6R3ARA821MJ80G
7) Chemi-Con NPCAP PXE · 6.3V · 820uF · 10x8mm · ESR= 14 mΩ · Ripple= 4300 · 15000h · APXE6R3ARA821MJ80G
8 ) Chemi-Con NPCAP PXE · 6.3V · 820uF · 10x8mm · ESR= 14 mΩ · Ripple= 4300 · 15000h · APXE6R3ARA821MJ80G
9) Chemi-Con NPCAP PXE · 6.3V · 820uF · 10x8mm · ESR= 14 mΩ · Ripple= 4300 · 15000h · APXE6R3ARA821MJ80G
10) Chemi-Con NPCAP PXE · 6.3V · 820uF · 10x8mm · ESR= 14 mΩ · Ripple= 4300 · 15000h · APXE6R3ARA821MJ80G
11) Chemi-Con NPCAP PXE · 6.3V · 820uF · 10x8mm · ESR= 14 mΩ · Ripple= 4300 · 15000h · APXE6R3ARA821MJ80G
12) Chemi-Con NPCAP PXE · 6.3V · 820uF · 10x8mm · ESR= 14 mΩ · Ripple= 4300 · 15000h · APXE6R3ARA821MJ80G
13) Chemi-Con NPCAP PXE · 6.3V · 820uF · 10x8mm · ESR= 14 mΩ · Ripple= 4300 · 15000h · APXE6R3ARA821MJ80G
Combined capacitance is now 6560uF. Combined ESR is now 14 / 8 = 1.75 mΩ
An atypical poly-mod: Combined capacitance has more than tripled after replacing the OEM lytics with polymer caps.
