Take me to the stars Jack: maxing a 7 year old AX1500i

[AnonymousGuy]

I thought this was interesting since it's rare to see these maxed outside of reviews.  And no one really mentioned where the OPP (over power protection) was on the AX1500i but it appears to at least be >10% above the sticker rating.  My Corsair experience with the SF600 was the OPP was about 20% above the sticker.

 

This is running at 240V tee'd off the dryer outlet, since it would probably blow the breaker on 115V (cable: NEMA 6-20P to IEC 60320 C19, 12AWG, 20A/5000W).  The fan was replaced with a Noctua P14 1500rpm (hence 1456 RPM instead of ~1800 with the stock fan), the ambient air temperature is 45C so +10C over ambient is pretty good IMO at max output.

 

I've been buying up people's panic-sale GPU's that are being sold for stupid cheap where even if Ethereum dies I can take a 50% profit loss and still make money. 

[Needfuldoer]

11 minutes ago, AnonymousGuy said:

I've been buying up people's panic-sale GPU's that are being sold for stupid cheap

Talk about burying the lede.

 

[AnonymousGuy]

4 minutes ago, Needfuldoer said:

Talk about burying the lede.

Ehhhh the method didn't matter so much as the result.  I hit about 1400W total with a single 3090 running Furmark + 1000W bios on water but that's not as cool/hot as 1700W!  I had to undervolt the shit out of all these cards to fit 6 of them in one PSU.  And I ran out of PCIe power connectors and had to do some molex -> pcie adapters.

[jaslion]

How cheap are you getting 3090's now? My cheapest rn was 530€ as I bought 8 founders editions from some dude who invested late in mining and has 32 amd mining cards sitting still (the no port mining only things aka ewaste stuff)

 

 

Its fun to see cryptobros crash and burn

[Cifer]

a/ Pushing a 1500W PSU to 1700W continuous
b/ Replacing the stock fan with an unadapted case fan with much lower max speed
c/ Using molex to PCIe adapter

a + b + c = recipe for disaster

[OhYou_]

hah, I've done similar with my silverstone 1000w. I was testing a 5970 i got for almost nothing in my main pc, just checking it and my 290x hash rate in slated md5, and it was pulling around 1000w from the wall, then I opened a web browser for something and the cpu spiked it up to 1170w lmao. 

what is actually going on is you are using 240v which hits the mains side with half the amperage and basically half the heat output and strain. Since that's usually the main weak point of 120vac power supplies, it's to no surprise it is moving some extra watts and keeping cool. 

 

3 hours ago, Cifer said:

c/ Using molex to PCIe adapter

not a problem if done intelligently. Each yellow wire is good for 75w, and assuming the pci-e slot is also capable of 75w delivery, you can run a 300-375w gpu ( depends on gpu if it utilizes slot power) off one true 6 pin and one molex adapter.
big asterisk on true 6 pin, the official spec is only two V+ wires but almost all are 3, and almost all gpus account for it. 

[AnonymousGuy]

7 hours ago, jaslion said:

How cheap are you getting 3090's now? My cheapest rn was 530€ as I bought 8 founders editions from some dude who invested late in mining and has 32 amd mining cards sitting still (the no port mining only things aka ewaste stuff)

 

 

Its fun to see cryptobros crash and burn

3080Ti's I got for about $725 each, no tax.  

3080's I got for average $580 each.

 

I'm betting in a year they'll be worth that much to a gamer based on how previous gens have fared.  I'm getting boosted if the 4000 series delays.  I know everyone is freaking right now about mining dying and the market being flooded but if BTC dropping 60% didn't shake the tree...the tree ain't giving any more up because profitability drops another 30%.  If I'm wrong...meh...this whole deal is more for entertainment and "what can I cobble together".

 

22 minutes ago, OhYou_ said:

not a problem if done intelligently. Each yellow wire is good for 75w, and assuming the pci-e slot is also capable of 75w delivery, you can run a 300-375w gpu ( depends on gpu if it utilizes slot power) off one true 6 pin and one molex adapter.
big asterisk on true 6 pin, the official spec is only two V+ wires but almost all are 3, and almost all gpus account for it. 

Yup, the slot pull is like 16W according to GPUz....I wouldn't have done it if I didn't check it but a single molex pin is worth 5-10A anyways.