Author

Topic: ribbon riser recycling (Read 587 times)

full member
Activity: 224
Merit: 100
CryptoLearner
March 16, 2017, 01:59:10 AM
#7
Missing is the key question, what is the value of your time?
 Let's start somewhere and assume that it took you an hour of labor to re-purpose this bad riser. If you cost $60/hr (labor + overhead), it was cheaper just to buy the damn part from amazon or ebay.

But alot less fun and you learn stuff !
hero member
Activity: 578
Merit: 508
March 16, 2017, 12:59:40 AM
#6
Missing is the key question, what is the value of your time?
 Let's start somewhere and assume that it took you an hour of labor to re-purpose this bad riser. If you cost $60/hr (labor + overhead), it was cheaper just to buy the damn part from amazon or ebay.
sr. member
Activity: 588
Merit: 251
March 15, 2017, 04:18:04 PM
#5
:O Points for ingenuity but is that safe?? A 6 pin PCIe plug should be able to handle 75w. Theoretically a molex can handle 11A per pin, so that should be fine, but I'm not so sure about that cheap Chinese PCB. Does it get hot/warm during use?

As far as the connector is concerned (Molex part#45558-0002), it's rated for 8 amps per pin, or almost 300W when all 3 12V pins are connected.  You make a good point about the PCB though, which isn't anything near 2oz copper (maybe not even 1oz).  It's got a good low-resistance ground pour, but the 12V power trace is relatively small and therefore gets pretty hot.  I'm going to shut down the rig and solder on a 18AWG jumper wire for the 12V pins.

p.s. I've updated the blog post and given you credit for pointing out the issue with the PCB trace thickness.
hero member
Activity: 1426
Merit: 506
March 15, 2017, 02:33:48 PM
#4
:O Points for ingenuity but is that safe?? A 6 pin PCIe plug should be able to handle 75w. Theoretically a molex can handle 11A per pin, so that should be fine, but I'm not so sure about that cheap Chinese PCB. Does it get hot/warm during use?
full member
Activity: 224
Merit: 100
CryptoLearner
March 15, 2017, 01:15:50 PM
#3
Nice & interesting blog you got there nerd' please continue it's very informative !  Wink
hero member
Activity: 751
Merit: 517
Fail to plan, and you plan to fail.
March 15, 2017, 10:39:02 AM
#2
OT : Love your blog Smiley
sr. member
Activity: 588
Merit: 251
March 15, 2017, 09:33:18 AM
#1
I re-purposed a flaky ribbon riser for a molex-PCIe power adapter.
http://nerdralph.blogspot.ca/2017/03/riser-recycling.html
Jump to: