On Thu, 3 Aug 2023 01:29:42 +0200 zithro <sl...@rabbit.lu> wrote: > On 02 Aug 2023 23:29, Celejar wrote: > > But reputable companies do produce 6-8 pin adapters, e.g.: > [...] > > (I just ordered the Cable Matters one.) > > Out of curiosity, I checked the links. > Funny that "reputable companies" (I'm not attacking you, but them) don't > even specify the max power rating as product specs, and when specified, > it's only in users Q&A ... > You also have to dig deep to get the wires size in AWG (ie: zoom on > pictures ...) ! > Compare that to the information you get for the PSU and the GPU ! > > Anyways : > 1st link: "The maximum power rating for the PCIEX68ADAP is 75W" > 2nd link: "Max Power Rating 150W" > 3rd link: (nowhere to be found, at least quickly) > > 1 and 2 use AWG18 wires, and on 3 they look even thinner (can't really > tell as the pic is s***). > I'd eliminate the 3 from the start. No specs, no money. > And either 1 or 2 is lying : same AWG, different power rating (ok, the > wire style is precised nowhere : single core, threaded, etc). But we can > safely assume that 150W @12V is not possible : 12.5A is out of specs. > (Try "https://www.engineeringtoolbox.com/wire-gauges-d_419.html"; for > more info on AWG, and use the formula Watts = Volts x Amperes). > > On 02 Aug 2023 23:37, piorunz wrote: > > Your GPU max TDP is 150W, meaning it will draw 75W from PCI-E slot and > > 75W from 8-pin cable. > > So the wires will work around their limits. > One little power spike and kaboom. > Fire, exclamation mark ; fire, exclamation mark. > Joke aside, the fire hazard is real. Especially exceeding limits with > low-end products, when you don't know if the materials are fire-proofed. > > > Your 8-pin adapter must have been very poor quality. I don't know what > > kind of adapter it was, but adapters which make 8-pin from 6-pin, are > > dangerous. Better to use 2x 6-pin -> 1x 8-pin adapter to correctly > > assign wires to each corresponding pin. > > I agree, so that each wire (or group of wires) does not exceed the max > current it can draw. > > I found two pages cleanly explaining this, both were worth a read. > But don't quickly jump to conclusions, follow the flow ! > > https://www.cgdirector.com/gpu-power-cable-guide/ > https://www.pcworld.com/article/395059/one-cable-or-two-for-powering-a-graphics-card-heres-the-answer.html
Thanks for the information and explanations! > zithro / Cyril Celejar
