Question 780W PSU but only 6 Pins. Can I use PCI Converter?

Sep 11, 2019
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I have a powerful 780W PSU that I have had for a while. I have recently upgraded my GPU from the GTX 1050 to the RTX 2060 Super, but that requires an 8 pin PCI, but my PSU only has two 6 Pin PCI cables. I found online that I can use an adapter to make it compatible, so I have ordered a 6 pin to 8 pin converter.

Im hoping this will work, but I have read mixed opinions online. Will it work?

My Current PSU: https://www.amazon.co.uk/HEC-Compucase-G7-Power-Extreme/dp/B005ERD0W4
My New GPU: https://www.amazon.co.uk/gp/product/B07V582F28/ref=ppx_yo_dt_b_asin_title_o04_s00?ie=UTF8&psc=1
My New Adapter: https://www.amazon.co.uk/gp/product/B07MBD9FKF
 
NO. Please don't use any adapters of any sort to power this GPU. This is usually not recommended for high-end Gaming GPUs. Get a compatible PSU, if possible. Else, it's your wish in the end.

I would usually avoid using such adapters to power any high-end GPU, even though it might work. But this is just my opinion.
 
Reactions: sizzling
Agree. This is a common sign of a low quality psu that is not up to the job and is likely putting the whole system at risk trying to use it. Unfortunately wattage rating on its own is meaningless, there are many that lie or calculate the wattage in deceptive ways. Additionally quality is also hugely important. I couldn't actually find a proper spec for that psu and its not listed on the Amazon link, this is another red flag. I would not even put that psu in a pc, let alone a gaming pc.
 
Reactions: Metal Messiah.
PSU is pretty old model. 600W on 4x 12V rails. Nowhere close to 780W, but still more than enough for RTX 2060 Super.
(RTX 2060 Super is 175W card and recommended PSU for it is 550W)
6pin to 8pin adapter is not safe.
2x 6pin to 8pin adapter is safe.



 
Well thank you for your insightful comments. I've thought about it andddddd...

I've ordered a new PSU; Better safe than sorry. :sweatsmile:

New PSU: https://www.amazon.co.uk/gp/product/B00JKVHL84/ref=ppx_yo_dt_b_asin_title_o00_s00?ie=UTF8&psc=1
Personally I would not recommend that PSU either. The PSU is the heart of the system, it powers everything and if it fails can damage other components, gamin pc's put the psu under high load for long periods of time (gaming sessions). The lowest level I would go is a Corsair CX550 but ideally something like the Seasonic Focus Gold 550.
 
NOPE. Do NOT use this AEROCOOL PSU at all ! Avoid like a plague. Aerocool PSUs are of very poor/inferior quality. There might be one model worth, but I'd still avoid using these on any Gaming PC. Not recommended for high-end Gaming PCs.

PSU is the last component you might want to cheap out on, or skimp. Try to get some other high quality PSU, IF possible. Power supplies are an imperative part of your system that should not be taken lightly. Throwing in a budget PSU could result in poor power efficiency or even a wrecked system. Don't SKIMP on the PSU,, since this is the MOST important PC component. I can't stress this enough.

I would recommend you to get the following PSU models and brands. These are high quality units. Look for similar SKUs.

SEASONIC PRIME, and Prime Ultra, or FOCUS Plus GOLD, Focus Plus Platinum.

CORSAIR AXi, RMi, RMx 550/650W, SF, HX 2017, HXi.

FSP - Hydro PTM 550/650W.

Cooler Master - MasterWatt Maker MiJ, V series 550/650W.

Antec - High Current Pro, High Current Platinum, Earthwatts Pro Gold, HCG Gold.

Super Flower - Leadex Gold II.

be Quiet! - Dark Power Pro 11, Straight Power 11, Dark Power Pro P10.

EVGA -Supernova.
 
Okay. Hold up. :openmouth:

I've cancelled that PSU. Should I order a 2x 6pin to 8pin adapter instead? I cant find it anywhere on Amazon. :/
The only adapter I will ever use is molex to case fan. Your best course of action is to just get a good quality PSU in the 550/650W range.
https://uk.pcpartpicker.com/product/dDH48d/corsair-txm-gold-550w-80-gold-certified-semi-modular-atx-power-supply-cp-9020133-na
The two linked PSUs are of good quality and include at least 2x 6+2pin PCIe cables for your GPU.
 
Your psu has two 6 pin connectors.
Use a 2 x 6 to 8 pin adapter cable like this:
https://www.amazon.com/EVGA-6-Pin-Female-8-Pin-Cable/dp/B00M49SELW

If you are going to change out your psu, buy only a top quality psu.
No less than tier 3 on a list such as this.
Seasonic focus is a very good unit.

Why not a cheap psu?
The danger is not that it might not work.
A cheap PSU will be made of substandard components. It will not have safety and overload protections.
The danger is if it fails under load, it can destroy anything it is connected to.
It will deliver advertised power only at room temperatures, not at higher temperatures found when installed in a case.
The wattage will be delivered on the 3 and 5v rails, not on the 12v rails where modern parts
like the CPU and Graphics cards need it. What power is delivered may fluctuate and cause instability
issues that are hard to diagnose.
The fan will need to spin up higher to cool it, making it noisy.
A cheap PSU can become very expensive.
Do not buy one.
 
Reactions: jonnyguru

jonnyguru

Distinguished
I have a powerful 780W PSU that I have had for a while.

My Current PSU: https://www.amazon.co.uk/HEC-Compucase-G7-Power-Extreme/dp/B005ERD0W4
Your link didn't take me to any 780W PSUs. Just a list of HEC PSUs.

That said, the only HEC 780W I know of is neither "powerful" or "good". It's a 600W double forward PSU w/o DC to DC and it's rated at "780W Peak" power, which I would guess means it could do 780W for 1ms at 0 degrees C.

Get rid of it and enter this decade with a quality PSU.

Well thank you for your insightful comments. I've thought about it andddddd...

I've ordered a new PSU; Better safe than sorry. :sweatsmile:

New PSU: https://www.amazon.co.uk/gp/product/B00JKVHL84/ref=ppx_yo_dt_b_asin_title_o00_s00?ie=UTF8&psc=1
That PSU is actually WORSE then the one you're replacing (worse quality, just newer.)
 
Reactions: Metal Messiah.

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