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8pin EPS Vs 8+4pin EPS (Vs 8+8pin)

I am buying new z390 motherboard for the upcoming 9900K, I plan to do moderate over lock once the guides come out.

 

I've noticed some boards come with 8pin EPS, some with 8+8 and some with 8+8.

I wonder if there is going to be any noticeable difference (lower vrm temps, more stable power delivery, ...) or any other advantage to running more then 8pin EPS, especially since we have been running x299 12c/24t on 8pin EPS motherboards without issue.

 

I would prefer 8+8pin mobo to 8+4 one, and I am thinking I will just buy 8pin one if no preferred 8+8 one exists.

 

Am I shooting myself in the foot by forgoing the additional EPS pins, or is the improvement marginal/PR, just like soldered dye turned out to be?

 

Thanks

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Doesn't make a difference. It's just useless marketing crap, just like the M.2 heatsinks. 

:)

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It depends on what wires your EPS cables has. If they are 18AWG wires then a single 8pin EPS can already give 480W of power (12V, 10A per pin on live wires, other half are ground wires). From currently available tests the 9900k doesnt pull more than 350w (or settings that can do that weren't tested yet), so a single 8pin EPS is totally enough.

 

If the wires are worse though.... Just get a new PSU. If you can afford a 9900k, the cost of a new PSU is merely pocket change.

CPU: i7-2600K 4751MHz 1.44V (software) --> 1.47V at the back of the socket Motherboard: Asrock Z77 Extreme4 (BCLK: 103.3MHz) CPU Cooler: Noctua NH-D15 RAM: Adata XPG 2x8GB DDR3 (XMP: 2133MHz 10-11-11-30 CR2, custom: 2203MHz 10-11-10-26 CR1 tRFC:230 tREFI:14000) GPU: Asus GTX 1070 Dual (Super Jetstream vbios, +70(2025-2088MHz)/+400(8.8Gbps)) SSD: Samsung 840 Pro 256GB (main boot drive), Transcend SSD370 128GB PSU: Seasonic X-660 80+ Gold Case: Antec P110 Silent, 5 intakes 1 exhaust Monitor: AOC G2460PF 1080p 144Hz (150Hz max w/ DP, 121Hz max w/ HDMI) TN panel Keyboard: Logitech G610 Orion (Cherry MX Blue) with SteelSeries Apex M260 keycaps Mouse: BenQ Zowie FK1

 

Model: HP Omen 17 17-an110ca CPU: i7-8750H (0.125V core & cache, 50mV SA undervolt) GPU: GTX 1060 6GB Mobile (+80/+450, 1650MHz~1750MHz 0.78V~0.85V) RAM: 8+8GB DDR4-2400 18-17-17-39 2T Storage: 1TB HP EX920 PCIe x4 M.2 SSD + 1TB Seagate 7200RPM 2.5" HDD (ST1000LM049-2GH172), 128GB Toshiba PCIe x2 M.2 SSD (KBG30ZMV128G) gone cooking externally Monitor: 1080p 126Hz IPS G-sync

 

Desktop benching:

Cinebench R15 Single thread:168 Multi-thread: 833 

SuperPi (v1.5 from Techpowerup, PI value output) 16K: 0.100s 1M: 8.255s 32M: 7m 45.93s

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32 minutes ago, seon123 said:

Doesn't make a difference. It's just useless marketing crap, just like the M.2 heatsinks. 

 

21 minutes ago, Jurrunio said:

It depends on what wires your EPS cables has. If they are 18AWG wires then a single 8pin EPS can already give 480W of power (12V, 10A per pin on live wires, other half are ground wires). From currently available tests the 9900k doesnt pull more than 350w (or settings that can do that weren't tested yet), so a single 8pin EPS is totally enough.

 

If the wires are worse though.... Just get a new PSU. If you can afford a 9900k, the cost of a new PSU is merely pocket change.

If I decide to go with 8+4 or 8+8, will it be necessary to populate both, or will single 8pin EPS cable suffice?

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2 minutes ago, jackar said:

 

If I decide to go with 8+4 or 8+8, will it be necessary to populate both, or will single 8pin EPS cable suffice?

A single 8 pin will be fine. 

:)

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2 minutes ago, jackar said:

 

If I decide to go with 8+4 or 8+8, will it be necessary to populate both, or will single 8pin EPS cable suffice?

if you have the cables, use all of them. The minimum is only 1 8pin, but you can certainly use more.

CPU: i7-2600K 4751MHz 1.44V (software) --> 1.47V at the back of the socket Motherboard: Asrock Z77 Extreme4 (BCLK: 103.3MHz) CPU Cooler: Noctua NH-D15 RAM: Adata XPG 2x8GB DDR3 (XMP: 2133MHz 10-11-11-30 CR2, custom: 2203MHz 10-11-10-26 CR1 tRFC:230 tREFI:14000) GPU: Asus GTX 1070 Dual (Super Jetstream vbios, +70(2025-2088MHz)/+400(8.8Gbps)) SSD: Samsung 840 Pro 256GB (main boot drive), Transcend SSD370 128GB PSU: Seasonic X-660 80+ Gold Case: Antec P110 Silent, 5 intakes 1 exhaust Monitor: AOC G2460PF 1080p 144Hz (150Hz max w/ DP, 121Hz max w/ HDMI) TN panel Keyboard: Logitech G610 Orion (Cherry MX Blue) with SteelSeries Apex M260 keycaps Mouse: BenQ Zowie FK1

 

Model: HP Omen 17 17-an110ca CPU: i7-8750H (0.125V core & cache, 50mV SA undervolt) GPU: GTX 1060 6GB Mobile (+80/+450, 1650MHz~1750MHz 0.78V~0.85V) RAM: 8+8GB DDR4-2400 18-17-17-39 2T Storage: 1TB HP EX920 PCIe x4 M.2 SSD + 1TB Seagate 7200RPM 2.5" HDD (ST1000LM049-2GH172), 128GB Toshiba PCIe x2 M.2 SSD (KBG30ZMV128G) gone cooking externally Monitor: 1080p 126Hz IPS G-sync

 

Desktop benching:

Cinebench R15 Single thread:168 Multi-thread: 833 

SuperPi (v1.5 from Techpowerup, PI value output) 16K: 0.100s 1M: 8.255s 32M: 7m 45.93s

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