A while ago I picked up a couple SuperMicro SC833 chassis for a really good price, which I'm using as general-purpose chassis for assorted projects.
While this is a relatively fine chassis, the power supplies it came with are kind of terrible. They're a three-unit redundant module, which isn't 80-plus certified at all. It's also rated for 760W, which is grossly overrated for what I have in it (I'm running a S2600CP mobo with dual E5-2660 V1 CPUs, and basically nothing else). This tops out at ~250W when it's completely loaded.
Old power supply. It's HUGE.
Anyways, the idea here is to replace the existing power supply with something that's actually efficent.
Right now, you can buy an 80-plus gold Supermicro PWS-351-1H power supply on ebay for $20 a pop (I bought 2 for $40). It's similar in noise-level, and should be a damn sight more efficient.
Sure, I know supermicro makes a more efficent PSU for this chassis, but they're quite expensive, and I'd still be running it at ~33% of it's capacity basically all the time, so I'd be well down the efficiency curve too.
Here's the replacement power supply where it's going to live:
It's amusingly disproportionate.
So, we need to mount to the screw holes where the old power supply went, and attach the new one. Some time in solidworks, and we have:
A fancy aluminium mounting plate that accounts for all the odd sheet-metal features, and should fit the power supply (and a support bar, since it's basically dangling in free space).
And with all the CAM work done. The oddball corners in the power supply recess are because I'm going to machine this with a 0.125" end-mill, and that means my minimum internal radius I can produce is 0.125" / 2. You push the corners out more so the part (which is basically rectangular) doesn't make contact on the corners.
Next up, making chips. I'm gonna go get food, and then fire up the bridgeport.
While this is a relatively fine chassis, the power supplies it came with are kind of terrible. They're a three-unit redundant module, which isn't 80-plus certified at all. It's also rated for 760W, which is grossly overrated for what I have in it (I'm running a S2600CP mobo with dual E5-2660 V1 CPUs, and basically nothing else). This tops out at ~250W when it's completely loaded.
Old power supply. It's HUGE.
Anyways, the idea here is to replace the existing power supply with something that's actually efficent.
Right now, you can buy an 80-plus gold Supermicro PWS-351-1H power supply on ebay for $20 a pop (I bought 2 for $40). It's similar in noise-level, and should be a damn sight more efficient.
Sure, I know supermicro makes a more efficent PSU for this chassis, but they're quite expensive, and I'd still be running it at ~33% of it's capacity basically all the time, so I'd be well down the efficiency curve too.
Here's the replacement power supply where it's going to live:
It's amusingly disproportionate.
So, we need to mount to the screw holes where the old power supply went, and attach the new one. Some time in solidworks, and we have:
A fancy aluminium mounting plate that accounts for all the odd sheet-metal features, and should fit the power supply (and a support bar, since it's basically dangling in free space).
And with all the CAM work done. The oddball corners in the power supply recess are because I'm going to machine this with a 0.125" end-mill, and that means my minimum internal radius I can produce is 0.125" / 2. You push the corners out more so the part (which is basically rectangular) doesn't make contact on the corners.
Next up, making chips. I'm gonna go get food, and then fire up the bridgeport.