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Issues with two 8-pin CPU connectors on motherboards

Issues with two 8-pin CPU connectors on motherboards

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KikiBalkan_YT
Junior Member
14
09-30-2022, 02:05 PM
#1
I checked the situation and found that a CPU typically requires two 8-pin connectors for full power, but your power supply only has one. Whether you need both depends on your motherboard's design—some boards can function with just one, while others might need both for optimal performance.
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KikiBalkan_YT
09-30-2022, 02:05 PM #1

I checked the situation and found that a CPU typically requires two 8-pin connectors for full power, but your power supply only has one. Whether you need both depends on your motherboard's design—some boards can function with just one, while others might need both for optimal performance.

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Kopertinjin
Member
70
10-04-2022, 01:25 PM
#2
This setup functions perfectly. Using several CPU connectors enables significantly greater overclocking potential. I previously boosted a Threadripper 1950x to 4.050GHz with a single 8-pin connector.
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Kopertinjin
10-04-2022, 01:25 PM #2

This setup functions perfectly. Using several CPU connectors enables significantly greater overclocking potential. I previously boosted a Threadripper 1950x to 4.050GHz with a single 8-pin connector.

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PrimePriorty
Junior Member
40
10-04-2022, 02:25 PM
#3
What CPU are you using?
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PrimePriorty
10-04-2022, 02:25 PM #3

What CPU are you using?

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CosmicGamerHQ
Member
59
10-07-2022, 05:00 AM
#4
You only require the single 8-pin connector; the additional 8-pin variant is intended for serious overclocking. Some models can handle more than 250 watts.
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CosmicGamerHQ
10-07-2022, 05:00 AM #4

You only require the single 8-pin connector; the additional 8-pin variant is intended for serious overclocking. Some models can handle more than 250 watts.

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saucycord
Junior Member
12
10-07-2022, 10:03 AM
#5
For Zen 2 (Ryzen 3000) systems, an extra 8-pin connector is usually sufficient unless you aim for extreme overclocking. With Comet Lake (Intel 10000), especially the i9-10900K, you might consider 8+4 pins if you plan a high-frequency all-core boost, though thermal constraints will likely limit you before hitting the 384W cap of a single 8-pin. Some board and power supply setups can push up to 480W from one 8-pin. For Threadripper models, using more than one 8-pin makes sense since they handle substantial power demands.
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saucycord
10-07-2022, 10:03 AM #5

For Zen 2 (Ryzen 3000) systems, an extra 8-pin connector is usually sufficient unless you aim for extreme overclocking. With Comet Lake (Intel 10000), especially the i9-10900K, you might consider 8+4 pins if you plan a high-frequency all-core boost, though thermal constraints will likely limit you before hitting the 384W cap of a single 8-pin. Some board and power supply setups can push up to 480W from one 8-pin. For Threadripper models, using more than one 8-pin makes sense since they handle substantial power demands.

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zMadeus
Posting Freak
755
10-08-2022, 05:26 PM
#6
In general, a single unit works well. But with an i9, it’s better to use two because the 10900K quickly exceeds 300W and can hit 400W under load.
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zMadeus
10-08-2022, 05:26 PM #6

In general, a single unit works well. But with an i9, it’s better to use two because the 10900K quickly exceeds 300W and can hit 400W under load.

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thaliadoll
Member
51
10-08-2022, 05:56 PM
#7
Does the manufacturer provide an official rating for this interface? The information suggests the 8-pin connector has a theoretical maximum of 336W, though practical limits are higher with stock cooling. You should have ample headroom unless you push overclocking limits.
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thaliadoll
10-08-2022, 05:56 PM #7

Does the manufacturer provide an official rating for this interface? The information suggests the 8-pin connector has a theoretical maximum of 336W, though practical limits are higher with stock cooling. You should have ample headroom unless you push overclocking limits.

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TruckSounds
Junior Member
38
10-12-2022, 04:31 PM
#8
Based on what I understand and what others like Buildzoid or experienced overclockers say, a single 8-pin connector can deliver up to 384W of power. With today’s power supplies, you should receive at least 8A per line—well above the typical ratings for Molex connectors (11, 12, or 13A). That means 4 lines × 8A × 12V = 384W. I’m not an expert on this topic, so I’d appreciate input from someone with more experience. I might have misunderstood it in my explanation.
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TruckSounds
10-12-2022, 04:31 PM #8

Based on what I understand and what others like Buildzoid or experienced overclockers say, a single 8-pin connector can deliver up to 384W of power. With today’s power supplies, you should receive at least 8A per line—well above the typical ratings for Molex connectors (11, 12, or 13A). That means 4 lines × 8A × 12V = 384W. I’m not an expert on this topic, so I’d appreciate input from someone with more experience. I might have misunderstood it in my explanation.

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KinoahKrazyK31
Member
56
10-13-2022, 12:24 PM
#9
It would be accurate, it's around 380 watts somewhere in the area.
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KinoahKrazyK31
10-13-2022, 12:24 PM #9

It would be accurate, it's around 380 watts somewhere in the area.

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666Cobra666
Member
161
10-13-2022, 02:47 PM
#10
The connection I mentioned earlier indicates each contact supports 7A, which explains the lower rating shown there. For reference, the comparable 8-pin PCIe power connector can handle up to 150W, though only three pairs are typically employed for power delivery. In this regard, it seems the focus should be on safe regular use rather than peak performance.
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666Cobra666
10-13-2022, 02:47 PM #10

The connection I mentioned earlier indicates each contact supports 7A, which explains the lower rating shown there. For reference, the comparable 8-pin PCIe power connector can handle up to 150W, though only three pairs are typically employed for power delivery. In this regard, it seems the focus should be on safe regular use rather than peak performance.