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Help me find a part - Thermaltake Toughpower 850w PSU 6pin to 8pin cable adapter to GPU

Ram|bunc|tious 24,598 1,944 October 14, 2016 at 08:40 AM
I have an old power supply unit, Thermaltake Toughpower 850 (W0131RU 850W ATX12V PSU [thermaltakeusa.com]), that I put into my son's gaming rig but I'm missing a power cable that will connect to new video card: MSI RADEON RX 480 GAMING X

The cable I need uses 6-pin PCI-E plug to connect to the PSU and a 8-pin plug for the GPU. The part is described as "8-pin-to-6-pin PCI-Express x 2" but I can't find the cable at home or online. I spoke with Thermaltake Tech Support who told me they don't have the part available because its discontinued and couldn't come up with a part number (really!) or any kind of alternate suggestion (gee, thanks a lot)

I currently have power going to the GPU through molex adapters which seems to be working but it is not clear to me how much power is actually making it to the video card.





Mission Impossible anyone? Scratchhead

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#2
I have one of those from a RaidMax RX-530 PSU. What you may need to search for, instead of 6-pin to 8-pin PCIE, is probably a 6+2-pin PCIE cable.
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#3
i feel like that cable description is worded bad. you need a cable that connects to both 6pin pci-e outputs and connects to a single 8pin input right? they make 6pin to 8 pin and 6 pin y cables.

it depends how many amps you are pulling from which rails. i'm inclined to think you are ok though. each 12v rail provides 18A+, and the card only draws 150 watts. I'd just make sure nothing heavy is on the same rail if you keep it on the molex rail.
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Last edited by dayv October 14, 2016 at 10:39 AM.
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#4
Quote from leo98918 View Post :
I have one of those from a RaidMax RX-530 PSU. What you may need to search for, instead of 6-pin to 8-pin PCIE, is probably a 6+2-pin PCIE cable.
I'm worried about compatibility. I picked up a cable that had that description and the plastic "sheathing" didn't fit (forgive the ignorant description).
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#5
Quote from Ram|bunc|tious View Post :
I'm worried about compatibility. I picked up a cable that had that description and the plastic "sheathing" didn't fit (forgive the ignorant description).
All I know is that it should say "PCI-E" on the connector, and like I said earlier, it's most likely a 6+2-pin PCI-E connection and not an 8-pin connection.

Edit: Take a picture of the GPU connection, go to a PC shop that sells PCI-E cables separately and compare the ends of those with your GPU. That's the only other way to find what you're looking for, IDK what else to tell you man.
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Last edited by leo98918 October 14, 2016 at 12:31 PM.
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#6
Quote from dayv View Post :
i feel like that cable description is worded bad. you need a cable that connects to both 6pin pci-e outputs and connects to a single 8pin input right? they make 6pin to 8 pin and 6 pin y cables.

it depends how many amps you are pulling from which rails. i'm inclined to think you are ok though. each 12v rail provides 18A+, and the card only draws 150 watts. I'd just make sure nothing heavy is on the same rail if you keep it on the molex rail.
I wish I had paid better attention to electrical engineering classes way back in the day Confused The "molex" rail is just the PCE-E rail, modular plug with molex outs. I'm only using a single plug on the PSU as that's the only cable I had with molex outs. The video card draws 225w btw

Quote from leo98918 View Post :
All I know is that it should say "PCI-E" on the connector, and like I said earlier, it's most likely a 6+2-pin PCI-E connection and not an 8-pin connection.

Edit: Take a picture of the GPU connection, go to a PC shop that sells PCI-E cables separately and compare the ends of those with your GPU. That's the only other way to find what you're looking for, IDK what else to tell you man.
Yeap, went to microcenter with the cable and they had nada Sadwalk but the customer rep did suggest the molex alternative so props for that. (I bought a 8-pin plug with a split molex plug at their suggestion)
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Last edited by Ram|bunc|tious October 14, 2016 at 12:36 PM. Reason: Automerged Doublepost
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#7
Quote from Ram|bunc|tious View Post :
I wish I had paid better attention to electrical engineering classes way back in the day Confused The "molex" rail is just the PCE-E rail, modular plug with molex outs. I'm only using a single plug on the PSU as that's the only cable I had with molex outs. The video card draws 225w btw



Yeap, went to microcenter with the cable and they had nada Sadwalk but the customer rep did suggest the molex alternative so props for that. (I bought a 8-pin plug with a split molex plug at their suggestion)
if this is what you are using, below, i wouldn't since you are going above the 18 amps. and the rail molex are hooked up is only 18A. short term you are probably fine but the wiring and stuff isn't rated for 19A (if it is 225w max draw). {if you aren't pushing the GPU to the edge it also won't draw the 225w. so short term you are probably fine}

http://www.newegg.com/Product/Pro...6812400034

i would get this, http://www.newegg.com/Product/Pro...6812201028 that way you are drawing your power from the right 12v rail.
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Last edited by dayv October 14, 2016 at 12:54 PM. Reason: ninja edit
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#8
Quote from dayv View Post :
if this is what you are using, below, i wouldn't since you are going above the 18 amps. and the rail molex are hooked up is only 18A. short term you are probably fine but the wiring and stuff isn't rated for 19A (if it is 225w max draw). {if you aren't pushing the GPU to the edge it also won't draw the 225w. so short term you are probably fine}

http://www.newegg.com/Product/Pro...6812400034 [newegg.com]

i would get this, http://www.newegg.com/Product/Pro...6812201028 [newegg.com] that way you are drawing your power from the right 12v rail.
Thanks. Yes, that's the adapter cable I'm using now. Let me check pin configuration to see if the other linked picture is compatible. Nice big picture makes it pretty clear. Thumbup
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#9
The molex adapter should be perfectly fine for what you're trying to do. I had to use that for a GTX 980 where I was missing an 8-pin connector and had to use a molex adapter hooked to the existing, and coincidentally Thermaltake PSU. Worked out perfectly fine in the long run.
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#10
Quote from menace33 View Post :
The molex adapter should be perfectly fine for what you're trying to do. I had to use that for a GTX 980 where I was missing an 8-pin connector and had to use a molex adapter hooked to the existing, and coincidentally Thermaltake PSU. Worked out perfectly fine in the long run.
Thanks, that's a relief to hear!
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#11
Really if you knew the pinout you could MAKE a cable - just use a few primary wires of sufficient AWG (use other cables as a reference or know the amps) and terminate both ends with round, push-on connectors. It won't have an OEM look but you can customize the length and power rating of the wires all you want.
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#12
Modular PSU cables are not universal.

https://www.reddit.com/r/hardware...swappable/
https://hardforum.com/threads/mod...e.1663690/

Using the molex adapters are not the best solution but it might work ok. I don't think you can deliver as much power as needed. I would run 3DMark and see if the GPU performs on par with others That should tell you if you have power problem http://www.futuremark.com/support/downloads
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#13
Quote from Ram|bunc|tious View Post :
Thanks, that's a relief to hear!
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#14
Quote from Dr. J View Post :
Really if you knew the pinout you could MAKE a cable - just use a few primary wires of sufficient AWG (use other cables as a reference or know the amps) and terminate both ends with round, push-on connectors. It won't have an OEM look but you can customize the length and power rating of the wires all you want.
I was a bit ticked off that Thermaltake Tech Support wouldn't provide the specifications on the cabling. C'mon man. That's why I've been so damn nervous.

Quote from LiquidRetro View Post :
Modular PSU cables are not universal.

https://www.reddit.com/r/hardware...swappable/ [reddit.com]
https://hardforum.com/threads/mod...e.1663690/ [hardforum.com]

Using the molex adapters are not the best solution but it might work ok. I don't think you can deliver as much power as needed. I would run 3DMark and see if the GPU performs on par with others That should tell you if you have power problem http://www.futuremark.com/support/downloads
Good suggestion - worth checking out!

Question ... do the 1060 video cards require additional power? I saw that FP deal for one with 6 GB at the same dang price point. I'm not a fan boy of either technology, I just want something that'll run to the best of its designed capacity for the next 2-3 years without putting my system at risk!
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Last edited by Ram|bunc|tious October 18, 2016 at 02:16 PM. Reason: Automerged Doublepost
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#15
Quote from stufine View Post :
I have a hard time throwing stuff away
Ok pack rat, want to compare nests? I have 4-5 boxes of cables splayed out in my office looking for that one dang cable that MUST have been included in the original box. I found the cool carrying case and extra cables but somehow missing this one!
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