Jump to content
Search In
  • More options...
Find results that contain...
Find results in...
docdj

MEG Z390 when is 2nd EPS cable REALLY needed?

Recommended Posts

Posted · Original PosterOP

I am planning to buying an MSI MEG Z90 mobo. PcPartPicker says it "requires" a PSU with TWO 8-pin EPS connections. MSI says you only need ONE, unless you are overclocking. I DO plan to OC an I7-8700K a little (20-30%), but I don't know if that means I REALLY need a PSU with dual 8-pin EPS connectors (Corsair RM850i/EVGA G3 850) vs their step-down 650W models. I am planning to use a Noctua NH-D15S cooler because need a long-term (years) stability w/o worrying about leaks, refilling coolant, etc. So It's obvious(?) that I won't be OC'ing  much. GPU: single RX 580 4GB.

 

I know the cost diff is small (compared to the rest of my choices), but advice from others would make me feel a LOT better about my choice. (I also don't want to raise my electricity bill a lot).

Link to post
Share on other sites
9 minutes ago, docdj said:

I am planning to buying an MSI MEG Z90 mobo. PcPartPicker says it "requires" a PSU with TWO 8-pin EPS connections. MSI says you only need ONE, unless you are overclocking. I DO plan to OC an I7-8700K a little (20-30%), but I don't know if that means I REALLY need a PSU with dual 8-pin EPS connectors (Corsair RM850i/EVGA G3 850) vs their step-down 650W models. I am planning to use a Noctua NH-D15S cooler because need a long-term (years) stability w/o worrying about leaks, refilling coolant, etc. So It's obvious(?) that I won't be OC'ing  much. GPU: single RX 580 4GB.

 

I know the cost diff is small (compared to the rest of my choices), but advice from others would make me feel a LOT better about my choice. (I also don't want to raise my electricity bill a lot).

under liquid nitrogen.

Link to post
Share on other sites

Depending on the actual board (there are a few MEG Z390), you either try blow the board up or going liquid nitrogen on an 9900k, that you'll need the second EPS connector plugged in


"What's under the heatsink?" ep1, "Why it's not as good as it seem?" AMD fanboy edition out, episode 2 "Why my gaming board is a scam?" Intel fanboy edition coming soon (this is a link)

Hardware specs below

CPU: i7-2600K 4745MHz 1.408V (software) --> 1.4?V at the back of the socket Motherboard: Asrock Z77 Extreme4 (BCLK: 103.2MHz) CPU Cooler: Noctua NH-D15 RAM: Adata XPG 2x8GB DDR3 (XMP: 2133MHz 10-11-11-30 CR2, custom: 2200MHz 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

Link to post
Share on other sites

You won't have any issues overclocking an i7 8700k on that motherboard with a single 8pin EPS connector. Not unless you're going for super high overclocks using sub-ambient cooling with a chiller or LN2 or whatnot. No need for dual 8pins with regular overclocking.

If for whatever reason you really want an additional EPS connector for the motherboard, the RM650i has 3 sockets for 6+2pin/8pin CPU on the PSU side. You could purchase an additional EPS12v cable for $4 from Amazon/Corsair website if you really wanted it. Just search for "Corsair Type4 8-pin EPS12v CPU cable"

https://www.corsair.com/us/en/Categories/Products/Accessories-|-Parts/PC-Components/Power-Supplies/Type-4-Sleeved-black-8-pin-(4%2B4)-ATX12V-EPS12V-Cable%2C-compatible-with-all-CORSAIR-type-4-pin-out-PSU/p/CP-8920141

Probably able to find replacement cables for the EVGA G3 on their website as well, but the RMi is the better unit between the two.

 

5 minutes ago, docdj said:

(I also don't want to raise my electricity bill a lot).

Power supplies only draw from the wall what the system demands. An 850w PSU doesn't consume 850w (or a little more like 950w due to efficiency loss) unless the system actually requires 850w. Doesn't change based on the wattage of the PSU. That's just a maximum rating for what the unit can do if needed.
Whether you're using an 850w PSU or 650w PSU, with an 8700k + RX 580 4GB you'll probably be consuming under 300w while gaming.


CPU: Intel i7 6700k  | Motherboard: Gigabyte Z170x Gaming 5 | RAM: 2x8GB 3000MHz G.Skill Ripjaws 5 | GPU: Gigabyte Aorus GTX 1080ti | PSU: Corsair RM750x (2018) | Case: BeQuiet SilentBase 800 | Cooler: Corsair H100i AIO | SSD: Samsung 970 Evo 500GB + Samsung 840 500GB | HDD: Seagate Ironwolf 8TB + 2x Seagate Ironwolf 6TB | Monitor: Acer Predator XB271HU + Samsung BX2450

Link to post
Share on other sites

Why that board if you are only running an 8700K ? You could easily go with something like a Gigabyte Z390 Aorus Elite/Pro for much less. Even the entry level Z390 UD wouldn't break a sweat with that cpu.


Winter is Coming.

Link to post
Share on other sites
Posted · Original PosterOP

Thanks for everyone's VERY helpful comments.

I'm looking at the MEG Z390 ACE because the Aorus Elite has only 2 PCIE full-size slots and Aorus Ultra and Pro appear to have have DPC latency problems, causing "clicks" in audio and lag in mouse response: https://www.hardocp.com/article/2017/11/27/gigabyte_z370_aorus_ultra_gaming_motherboard_review/4

I am also l looking at the ASUS Maximus XI Hero wifi, because it has onboard HDMI port (for backup).

 

And thanks to your post, I'm now looking at the i7-9700K which is not as much more than the 8700k than it used to be.

 

Does that make a diff?

Link to post
Share on other sites
7 hours ago, docdj said:

Thanks for everyone's VERY helpful comments.

I'm looking at the MEG Z390 ACE because the Aorus Elite has only 2 PCIE full-size slots and Aorus Ultra and Pro appear to have have DPC latency problems, causing "clicks" in audio and lag in mouse response: https://www.hardocp.com/article/2017/11/27/gigabyte_z370_aorus_ultra_gaming_motherboard_review/4

I am also l looking at the ASUS Maximus XI Hero wifi, because it has onboard HDMI port (for backup).

 

And thanks to your post, I'm now looking at the i7-9700K which is not as much more than the 8700k than it used to be.

 

Does that make a diff?

That review is for the Z370 Aorus Ultra Gaming though, not the Z390 Aorus boards. Also it says that the DPC latency is solid, unless I misread it ?

 

If you are looking at the Asus Maximus Hero XI then the Aorus Master is in that price range. That has a HDMI port at the rear as well. The Gigabyte Z390 Designare is also around the same price. That also has Dual Lan and Thunderbolt 3 at the rear i/o as well as a HDMI port.  

 

The Asus board is 'OK' but the VRM is somewhat lacking compared to any of the Gigabyte Aorus boards. The only real plus is that Asus has a much better/smoother bios.

 

The 9700K will run fine on any Z390 board. The 9900K is the one you need to be more careful with regarding board selection.


Winter is Coming.

Link to post
Share on other sites

@Jurrunio @Spotty

 

Tho there's no harm on having it plugged in even when not planning high OCs, right?

I'm under the impression that having it plugged in would provide some sort of "headroom"

So it would never get even close to putting too much pressure when powering with only 1 EPS


Current, Old Rig

 

Mobo: Asus B85M-E // CPU: i7-4770K // GPU: Gigabyte G1 1070 // RAM: 16GB Single Channel // Cooling: Stock Intel // Storage: 167 GB SDD OCZ Agilty3, 2 TB Seagate Barracuda // PSU: AeroCool Strike X 800w 80+ Silver // Case: Corsair SPEC-03 Blue LED Mid-Tower

 

New Rig (in The Works, Missing PSU)

 

Mobo: MSI Z390 Godlike // CPU: i9-9900K // GPU: Galax Hall of Fame 2080 Ti // RAM: 32GB Dual Channel // Cooling: D15S with 3 Noctua Fans // Storage: 1TB SSD Samsung 860 EVO, 6TB Seagate Barracuda PRO // PSU: RMi 850w 80+ Gold // Case: TT View 37 RGB Edition

 

Peripherals And Others

 

Mouse: Razer Mamba Tournament Edition // Keyboard: Razer Blackwidow X Chroma Mercury White // Headphone: Razer Man'O War 7.1 // Display: LG 2560x1080 25' 60Hz Ultrawide // UPS: Pure Sine Wave, Online Topology 3000VA (2100w) (this shit is heavy as fuck)

 

- Previously ReggieGRS

Link to post
Share on other sites
1 hour ago, Queen Chrysallis said:

@Jurrunio @Spotty

 

Tho there's no harm on having it plugged in even when not planning high OCs, right?

I'm under the impression that having it plugged in would provide some sort of "headroom"

So it would never get even close to putting too much pressure when powering with only 1 EPS

You won't get close to maxing out the 8 pin under normal usage/overclocking. You can plug both in if you have the connectors on your psu but you don't need to. It might be different for a higher end cpu i.e a 32 core TR4.


Winter is Coming.

Link to post
Share on other sites
10 minutes ago, lee32uk said:

It might be different for a higher end cpu i.e a 32 core TR4.

I had a 9900K in mind when i asked it as it is a power hungry chip


Current, Old Rig

 

Mobo: Asus B85M-E // CPU: i7-4770K // GPU: Gigabyte G1 1070 // RAM: 16GB Single Channel // Cooling: Stock Intel // Storage: 167 GB SDD OCZ Agilty3, 2 TB Seagate Barracuda // PSU: AeroCool Strike X 800w 80+ Silver // Case: Corsair SPEC-03 Blue LED Mid-Tower

 

New Rig (in The Works, Missing PSU)

 

Mobo: MSI Z390 Godlike // CPU: i9-9900K // GPU: Galax Hall of Fame 2080 Ti // RAM: 32GB Dual Channel // Cooling: D15S with 3 Noctua Fans // Storage: 1TB SSD Samsung 860 EVO, 6TB Seagate Barracuda PRO // PSU: RMi 850w 80+ Gold // Case: TT View 37 RGB Edition

 

Peripherals And Others

 

Mouse: Razer Mamba Tournament Edition // Keyboard: Razer Blackwidow X Chroma Mercury White // Headphone: Razer Man'O War 7.1 // Display: LG 2560x1080 25' 60Hz Ultrawide // UPS: Pure Sine Wave, Online Topology 3000VA (2100w) (this shit is heavy as fuck)

 

- Previously ReggieGRS

Link to post
Share on other sites
20 minutes ago, Queen Chrysallis said:

I had a 9900K in mind when i asked it as it is a power hungry chip

Still fine with a single 8 pin.


Winter is Coming.

Link to post
Share on other sites
2 hours ago, Queen Chrysallis said:

@Jurrunio @Spotty

 

Tho there's no harm on having it plugged in even when not planning high OCs, right?

I'm under the impression that having it plugged in would provide some sort of "headroom"

So it would never get even close to putting too much pressure when powering with only 1 EPS

there's no harm, just no benefits either (tho not having empty headers can satisfy OCDs)

 

9 hours ago, docdj said:

And thanks to your post, I'm now looking at the i7-9700K which is not as much more than the 8700k than it used to be.

 

Does that make a diff?

Z370 doesnt necessarily come with 9th gen support, but Z390 all do. Similar performance and power draw to an 8700k, but easier to cool.

 

9 hours ago, docdj said:

Thanks for everyone's VERY helpful comments.

I'm looking at the MEG Z390 ACE ... Aorus Elite ... ASUS Maximus XI Hero wifi,

Gigabyte especially expensive? Because in US prices, it's Ace versus Master versus M11 Hero. Yes, Master is different to the Elite, Pro, Ultra and Designaire.


"What's under the heatsink?" ep1, "Why it's not as good as it seem?" AMD fanboy edition out, episode 2 "Why my gaming board is a scam?" Intel fanboy edition coming soon (this is a link)

Hardware specs below

CPU: i7-2600K 4745MHz 1.408V (software) --> 1.4?V at the back of the socket Motherboard: Asrock Z77 Extreme4 (BCLK: 103.2MHz) CPU Cooler: Noctua NH-D15 RAM: Adata XPG 2x8GB DDR3 (XMP: 2133MHz 10-11-11-30 CR2, custom: 2200MHz 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

Link to post
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now


×