subhuman@xgtx wrote:

obobskivich wrote:

subhuman@xgtx wrote:

Necroresurrecting.

Okay, the 8264 and PSU are arriving today/tomorrow and I was able to run the system decently with an el-cheapo 550w that has enough amp rates for a S462 system with moderate overclock.

As obobskivich suggested I will have to run the two psus together to power up the system properly. The problem is I don't have a relay or something like an Add2PSU; how can I bridge them properly without risk? If I could get them to work then the 550 watter would be powering up the mainboard and main video card and the TKpower psu the 8264 along with a 500gb hdd and some fans.

Does the Q3D PSU use a normal ATX connector (meaning, is the pinout proper?)? If not, does it at least support soft-start? If so just tie it into the other PSU's PWR_on headers like you would with a two PSU adapter (it's a simple cable adapter - Lian-Li and Cooler Master used to give them away with various cases). Should work, but ofc this is all "in theory." Alternatively you could get a very modern monster PSU (like one of the higher end PC Power or Seasonic units) that can drive 60-100A on a single 12V, and just have a 12V->2.9V DC->DC section. 75A 2.9V from 12V would be probably around a 25-30A load, and a single XP shouldn't have issues with "only" 30-60A 12V remaining. Dodge Garage 3dfx has directions for building such an adapter under the Alchemy FAQ page.

Thanks for coming again. The PSU does indeed have a normal atx plug, just with the extra propietary connectors coming along with the rest of cables so that means I could give that a shot.

As long as it's wired properly (I'm just remembering those Dells with the non-standard 20-pin connectors from around the same time period (I actually have one still kicking around)) it should work - just let the board fire up both PSUs. Personally I'd probably be a little bit of a coward and only try it the first time with the bare minimum of hardware needed to test it out; over the years there has been a very strong divide between whether or not folks believe its okay to power a card from two PSUs (one PSU powering the mobo and one providing aux power) - I've seen Guru3D do it with GTX 480s and it worked for them, but I've never had a reason to test it out myself (never had issues powering up two PSUs to run extra hard-drives, fans, etc). So basically I'd take it a little bit slow but would still go ahead and try it, since it should work in theory. 😀