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unstable speed in PCIe x1 extender
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Topic: unstable speed in PCIe x1 extender (Read 3107 times)
no_alone
(OP)
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unstable speed in PCIe x1 extender
June 17, 2011, 10:06:21 AM
#1
Hello,
I have a pc with 2 5850, 1 PCI-e x16 and 1 PCI-e x 1
And I'm experiencing unstable speed on the PCI-e x1
Anyone know what could be the reason for this??
bolth of the cards are overclocked 850,900 and one is stable on 320MH/S and the second one the PCI-Ex1 is going up and down between 260 to 320...
Anyhelp will be great thank you
Mine only when pc is IDLE totally indivisible...
http://forum.bitcoin.org/index.php?topic=9851.0
Mine on family computer without disturbing them
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hugolp
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Radix-The Decentralized Finance Protocol
Re: unstable speed in PCIe x1 extender
June 17, 2011, 10:23:07 AM
#2
Im getting stable speed of 441Mh/s on a 5870 using a pci-e x1 to x16 extender (the extender has a molex to get the energy from the PS directly and not from the motherboard, got it at cablesaurius).
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no_alone
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Re: unstable speed in PCIe x1 extender
June 17, 2011, 11:01:02 AM
#3
Well I dont use a one with a molex. .Maybe I can modify it?
Could this be the problem?
Mine only when pc is IDLE totally indivisible...
http://forum.bitcoin.org/index.php?topic=9851.0
Mine on family computer without disturbing them
Donation : 1GjpJnLU8zdfEHW7FoCx2UUosJgc9prXN4
kripz
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Re: unstable speed in PCIe x1 extender
June 17, 2011, 01:54:23 PM
#4
http://pinouts.ru/Slots/pci_express_pinout.shtml
Reroute 12v from PCI-E to draw from molex.
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Freakin
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Re: unstable speed in PCIe x1 extender
June 17, 2011, 04:28:28 PM
#5
Quote from: kripz on June 17, 2011, 01:54:23 PM
http://pinouts.ru/Slots/pci_express_pinout.shtml
Reroute 12v from PCI-E to draw from molex.
just pin 2 running to 12v in a molex connector is all you need?
Got a bunch of 1x extenders and don't want to wait to get some ones w/ molex from cablesarus
wasn't able to use my 3rd 5830 in a p5w DH. I'm sure i'll have bigger problems trying to get 3x 5830 & a 5870 running in my 939 lanparty board
Freakin
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⇾
Re: unstable speed in PCIe x1 extender
June 17, 2011, 04:33:45 PM
#6
nevermind, found it
Quote
I modified each of the four flexible PCIe extenders to re-route the five 12V lines (PCIe pins A2, A3, B1, B2, B3) to a single 16AWG stranded wire directly connected to one of the 12V outputs of the power supply.
http://blog.zorinaq.com/images/flex-pcie-4x-modified.jpg
http://blog.zorinaq.com/?e=44
Here is the prebuilt product from cablesarus, with BTC accepted
https://cablesaurus.com/index.php?main_page=product_info&cPath=1&products_id=11
kripz
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Re: unstable speed in PCIe x1 extender
June 18, 2011, 04:51:47 AM
#7
The thing i dont understand is, 1000000A is being sucked in via molex but has to exit through the PCI lane, why dont people modify the negative?
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no_alone
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Merit: 10
Re: unstable speed in PCIe x1 extender
June 19, 2011, 10:02:32 AM
#8
Quote from: Freakin on June 17, 2011, 04:33:45 PM
nevermind, found it
Quote
I modified each of the four flexible PCIe extenders to re-route the five 12V lines (PCIe pins A2, A3, B1, B2, B3) to a single 16AWG stranded wire directly connected to one of the 12V outputs of the power supply.
http://blog.zorinaq.com/images/flex-pcie-4x-modified.jpg
http://blog.zorinaq.com/?e=44
Here is the prebuilt product from cablesarus, with BTC accepted
https://cablesaurus.com/index.php?main_page=product_info&cPath=1&products_id=11
In this website it say it re-routed 5 12v lines...
Quote from: kripz on June 17, 2011, 01:54:23 PM
http://pinouts.ru/Slots/pci_express_pinout.shtml
Reroute 12v from PCI-E to draw from molex.
But from this chart you can understand that there are only 4 12v lines
A2 A3 B1 B2
B3 is Reserved and not 12V ...
Soo do I also re-route him or not? thank you.
Mine only when pc is IDLE totally indivisible...
http://forum.bitcoin.org/index.php?topic=9851.0
Mine on family computer without disturbing them
Donation : 1GjpJnLU8zdfEHW7FoCx2UUosJgc9prXN4
kripz
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Re: unstable speed in PCIe x1 extender
June 19, 2011, 10:50:17 AM
#9
Dont know, i'd advise looking up the PCI-E specs when messing with an expensive computer/gfx card.
Merged mining, free SMS notifications, PayPal payout and much more.
http://btcstats.net/sig/JZCODg2
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