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2 in 1 question: Molex to PCI-E adaptors & RX x70/x80/590 cards with 1 PCI-E connector

Lord Letto
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Ok, I have a EVGA Supernova G2 550W PSU I bought used, however when I installed & went to put everything together today I noticed it only came with 1 PCI-E cable with 1 PCI-E 6+2 pin connector, however the Radeon HD 6970 I'll be using for testing & GTX 780 I'll be installing when I get it home requires a 6 & 8 pin connector so I have 2 questions:

1: Is it OK to use molex to PCI-E adaptors for the 6 pin connector?

2: I know the GTX 1060 up to the GTX 1080 requires a single 6 or 8 pin connector & apparently the 970 requires 2 6 pins, so I'm wondering what is the best RX card that's equivilent to a GTX 780 or GTX 1060 3GB with only 1 connector instead of 2 so I can check options on both the green & red teams so I could maybe sell both my GPUs & get a newer card that only requires 1 connection, no adapters required.

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HD 6970 uses up to 200 watts ... takes around 40-50w from pci-e slot, rest from pci-e connectors.... up to 150w from pci-e 8 pin and whatever's left through the 6pin .. in real world it more or less gets spread across the two connectors, so around 75w through each connector.

GTX780 uses up to around 225 watts... same thing

 

Shoving 60-80w through a molex to pci-e 6+2 adapter is doable, but not recommended

 

Get a RX 570 or a RX 580 as they're super cheap these days... both should come with only a 8 pin connector (or there's versions with just one connector) .. rx

Newegg has some RX 570 4GB cards for 130$ (after 20$ mail in rebate) or other models 140$ without any rebates. RX 580's are 180$.

 

570 tops at ~ 175w , rx 580 tops at around 225w

gtx 1060 tops at around 120w , gtx 1070/1070ti go up to 150w / 175w

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4 minutes ago, Lord Letto said:

 

1: Is it OK to use molex to PCI-E adaptors for the 6 pin connector?

make sure the adapter and molex cable is good quality. You're pushing the work of 3 12v wires on 1 wire after all, even though PCIe standards massively under-spec wires' capabilities.

 

7 minutes ago, Lord Letto said:

2: I know the GTX 1060 up to the GTX 1080 requires a single 6 or 8 pin connector & apparently the 970 requires 2 6 pins, so I'm wondering what is the best RX card that's equivilent to a GTX 780 or GTX 1060 3GB with only 1 connector instead of 2 so I can check options on both the green & red teams so I could maybe sell both my GPUs & get a newer card that only requires 1 connection, no adapters required.

Ask the seller for the extra cable first.

 

so you want to change GPU just because it saves power? No need for extra performance?

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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1 hour ago, Jurrunio said:

make sure the adapter and molex cable is good quality. You're pushing the work of 3 12v wires on 1 wire after all, even though PCIe standards massively under-spec wires' capabilities.

 

Ask the seller for the extra cable first.

 

so you want to change GPU just because it saves power? No need for extra performance?

IIRC there should be some molex to PCI-E adapters that was included in the box for the 6970 so I'd likely use one of those.

 

I just sent the seller a email asking if he got a extra cable, though I'm not expecting a reply.

if I change GPU, it would be mainly to save power though better performance would be nice also, it will be paired with a Ryzen 3 1200 on a ASRock AB350 Pro4, assuming it works, got everything installed today, just need to power a GPU to test everything, if I hold off & don't use a molex to PCI-E adapter, I'm sure I can borrow a 10ish year old GPU that don't need extra power for testing if it POSTs and whatnot.

 

Edit: If I buy a replacement GPU, I expect to have $150 to $200 Canadian, if I get my asking price then $225 ($60 for the 6970, $175 for the GTX 780 or $225 for both As-Is). For $200 brand new looking at ca.pcpartpicker.com the best options currently are a GTX 1050 or RX 560 though there's a RX 570 4GB on sale for $200 until the 29th, on the local used market I could maybe get a GTX 1060 3GB or a RX 470 8GB (that I suspect was used for mining) for $150 to $170, or a 1050ti for $200.

Edited by Lord Letto
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28 minutes ago, Lord Letto said:

IIRC there should be some molex to PCI-E adapters that was included in the box for the 6970 so I'd likely use one of those.

 

I just sent the seller a email asking if he got a extra cable, though I'm not expecting a reply.

if I change GPU, it would be mainly to save power though better performance would be nice also, it will be paired with a Ryzen 3 1200 on a ASRock AB350 Pro4, assuming it works, got everything installed today, just need to power a GPU to test everything, if I hold off & don't use a molex to PCI-E adapter, I'm sure I can borrow a 10ish year old GPU that don't need extra power for testing if it POSTs and whatnot.

I mean, as you said yourself, some 1070ti (around the $350 mark) only need 1 PCIe 8pin. If you're upgrading, get something actually faster noticeably.

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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40 minutes ago, Jurrunio said:

I mean, as you said yourself, some 1070ti (around the $350 mark) only need 1 PCIe 8pin. If you're upgrading, get something actually faster noticeably.

Guessing $350 USD?

Here in Canada, cheapest 1070ti new according to ca.pcpartpicker.com is $470 on newegg.ca with the cheapest on my local classifieds (Kijiji, Kitchener Ontario Area) being $480.

for the 1070, the cheapest new is $500 from amazon.ca or newegg.ca with the cheapest on local classifieds being $350.

On eBay, cheapest 1070 located in Canada is $356.76 ($269.99 US) with free shipping, was pulled from a slightly used Dell XPS, cheapest 1070ti in Canada is $499 or best offer with free shipping for a used EVGA FTW2.

switching from Canada to worldwide, cheapest+shipping (excluding import fees) is $289.39 ($219 US) + $38.28 ($28.97 US) for shipping (+$45.52 ($34.37 US) estimated import charge from the US) for a PNY 1070, cheapest 1070ti would be $396.42 ($300 US) + $21.14 ($16 USD) for shipping.

in any case, that would be about 1.5 to 2.5 times my budget, unless I wait for sometime in the new year and use a molex to PCi-E adapter for the next couple months.

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19 minutes ago, Lord Letto said:

Guessing $350 USD?

Here in Canada, cheapest 1070ti new according to ca.pcpartpicker.com is $470 on newegg.ca with the cheapest on my local classifieds (Kijiji, Kitchener Ontario Area) being $480.

for the 1070, the cheapest new is $500 from amazon.ca or newegg.ca with the cheapest on local classifieds being $350.

On eBay, cheapest 1070 located in Canada is $356.76 ($269.99 US) with free shipping, was pulled from a slightly used Dell XPS, cheapest 1070ti in Canada is $499 or best offer with free shipping for a used EVGA FTW2.

switching from Canada to worldwide, cheapest+shipping (excluding import fees) is $289.39 ($219 US) + $38.28 ($28.97 US) for shipping (+$45.52 ($34.37 US) estimated import charge from the US) for a PNY 1070, cheapest 1070ti would be $396.42 ($300 US) + $21.14 ($16 USD) for shipping.

in any case, that would be about 1.5 to 2.5 times my budget, unless I wait for sometime in the new year and use a molex to PCi-E adapter for the next couple months.

then just use an adapter. for the time. Getting a lower power draw GPU just because the PSU lacks a cable just seems... not worth it.

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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Bump: Just double checked & there were 3 molex to PCI-E adapters in the box for the 6970, 2x twin molex to 6+2 PCI-E & a twin molex to 6 pin PCI-E

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19 hours ago, Lord Letto said:

IIRC there should be some molex to PCI-E adapters that was included in the box for the 6970 so I'd likely use one of those.

 

If you want to burn down the house you can use them.

 

If not, you ask @CableMod if it is possible to sell you a PCIe Cable for your EVGA G2.

 

Otherwise you cold get for example one of those:

https://cablemod.com/product/cablemod-e-series-g2-p2-basic-cable-kit-black/

 

Of you could ask the EVGA Support for the cable you need.

 


YOU DO NOT USE MOLEX TO PCIE OR PCIE Y-CABLES!

 

"Hell is full of good meanings, but Heaven is full of good works"

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Don't use adapters.  They're potentially dangerous.

23 hours ago, Lord Letto said:

Ok, I have a EVGA Supernova G2 550W PSU I bought used, however when I installed & went to put everything together today I noticed it only came with 1 PCI-E cable with 1 PCI-E 6+2 pin connector

Then you must have lost one of the cables.

 

G2 550W comes with two PCIe cables.  One with one connector and one with two connectors.

 

http://www.jonnyguru.com/modules.php?name=NDReviews&op=Story2&reid=440

 

If you can't find the lost cable, buy a replacement instead of jury rigging with adapters.

 

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23 hours ago, Lord Letto said:

Ok, I have a EVGA Supernova G2 550W PSU I bought used, however when I installed & went to put everything together today I noticed it only came with 1 PCI-E cable with 1 PCI-E 6+2 pin connector, however the Radeon HD 6970 I'll be using for testing & GTX 780 I'll be installing when I get it home requires a 6 & 8 pin connector so I have 2 questions:

1: Is it OK to use molex to PCI-E adaptors for the 6 pin connector?

2: I know the GTX 1060 up to the GTX 1080 requires a single 6 or 8 pin connector & apparently the 970 requires 2 6 pins, so I'm wondering what is the best RX card that's equivilent to a GTX 780 or GTX 1060 3GB with only 1 connector instead of 2 so I can check options on both the green & red teams so I could maybe sell both my GPUs & get a newer card that only requires 1 connection, no adapters required.

@Lord Letto sounds like a perfect time to upgrade to sleeved cables. :)

 

https://store.cablemod.com/products/?filter_models=g3-g2-p2-t2

 

Or if you just want individual PCI-E cables, you can purchase individual cables from our configurator page.

https://store.cablemod.com/configurator/

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On 11/23/2018 at 10:06 PM, Lord Letto said:

IIRC there should be some molex to PCI-E adapters that was included in the box for the 6970 so I'd likely use one of those.

 

I just sent the seller a email asking if he got a extra cable, though I'm not expecting a reply.

if I change GPU, it would be mainly to save power though better performance would be nice also, it will be paired with a Ryzen 3 1200 on a ASRock AB350 Pro4, assuming it works, got everything installed today, just need to power a GPU to test everything, if I hold off & don't use a molex to PCI-E adapter, I'm sure I can borrow a 10ish year old GPU that don't need extra power for testing if it POSTs and whatnot.

 

Edit: If I buy a replacement GPU, I expect to have $150 to $200 Canadian, if I get my asking price then $225 ($60 for the 6970, $175 for the GTX 780 or $225 for both As-Is). For $200 brand new looking at ca.pcpartpicker.com the best options currently are a GTX 1050 or RX 560 though there's a RX 570 4GB on sale for $200 until the 29th, on the local used market I could maybe get a GTX 1060 3GB or a RX 470 8GB (that I suspect was used for mining) for $150 to $170, or a 1050ti for $200.

 

On 11/23/2018 at 10:36 PM, Jurrunio said:

I mean, as you said yourself, some 1070ti (around the $350 mark) only need 1 PCIe 8pin. If you're upgrading, get something actually faster noticeably.

 

On 11/23/2018 at 11:14 PM, Lord Letto said:

Guessing $350 USD?

Here in Canada, cheapest 1070ti new according to ca.pcpartpicker.com is $470 on newegg.ca with the cheapest on my local classifieds (Kijiji, Kitchener Ontario Area) being $480.

for the 1070, the cheapest new is $500 from amazon.ca or newegg.ca with the cheapest on local classifieds being $350.

On eBay, cheapest 1070 located in Canada is $356.76 ($269.99 US) with free shipping, was pulled from a slightly used Dell XPS, cheapest 1070ti in Canada is $499 or best offer with free shipping for a used EVGA FTW2.

switching from Canada to worldwide, cheapest+shipping (excluding import fees) is $289.39 ($219 US) + $38.28 ($28.97 US) for shipping (+$45.52 ($34.37 US) estimated import charge from the US) for a PNY 1070, cheapest 1070ti would be $396.42 ($300 US) + $21.14 ($16 USD) for shipping.

in any case, that would be about 1.5 to 2.5 times my budget, unless I wait for sometime in the new year and use a molex to PCi-E adapter for the next couple months.

 

On 11/23/2018 at 11:40 PM, Jurrunio said:

then just use an adapter. for the time. Getting a lower power draw GPU just because the PSU lacks a cable just seems... not worth it.

basicly a GTX 1060 or RX 580, a 1070+ wouldn't be worth it

The GTX 1060/RX 580 should perform better than my old GTX 780.

 

 

On the topic of cables, anyone use a chinese cable? Here's 1 I found for $8 US ($10.59 Canadian) + $5 US ($6.62 Canadian) shipping so $13 US ($17.21 Canadian) total:

https://rover.ebay.com/rover/0/0/0?mpre=https%3A%2F%2Fwww.ebay.com%2Fulk%2Fitm%2F142394692346

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1 minute ago, Lord Letto said:

basicly a GTX 1060 or RX 580, a 1070+ wouldn't be worth it

Upgrading more times (which you will if you get 1060 or RX 580) is even more not worth it compared to getting a mid-high end GPU from the start.

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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Would a G3 cable work with the G2? I made a post on r/CanadianHardwareSwap looking for a cable & someone got a 2x 6+2 PCI-E cable from a G3 they're not using & we may be able to work something out, I just want to make sure it works before contacting him & working something out. Some cables I found online are listed for the G2 (550 to 1600), P2 & T2 (750 to 1600), while some list more series such as the G3 (along with GP, GM & PQ).

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1 hour ago, Lord Letto said:

Would a G3 cable work with the G2? 

Did you look at what Cablemod posted?!

"Hell is full of good meanings, but Heaven is full of good works"

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19 minutes ago, Stefan Payne said:

Did you look at what Cablemod posted?!

I did, I see it says G2 & G3, just wanted to make sure though.

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