Bitcoin Forum
December 02, 2016, 06:29:06 PM *
News: To be able to use the next phase of the beta forum software, please ensure that your email address is correct/functional.
 
   Home   Help Search Donate Login Register  
Pages: « 1 2 [3]  All
  Print  
Author Topic: RISERS for 2 coins  (Read 3819 times)
CrazyGuy
Legendary
*
Offline Offline

Activity: 1806



View Profile
February 06, 2012, 04:42:05 AM
 #41

I'm not sure how you can  be drawing 1000w from the wall with 3 5970's and a 5830.  You may want to remeasure that.  3x 5970 = 900w and I can't imagine everything else only taking 100w.  At the wall, no less.. which means you are only drawing ~750w DC?  I just can't see that happening with a fully loaded set of GPUs.

Anyway, they are easy to make yourself if you've got a fine tipped soldering iron.  It's 5 wires you have to remove from the PCB end, solder together onto a molex and away you go.

No joke, my machine is currently plugged into a Kill A Watt meter and it hovers around 1000w at full load. Configuration has changed a bit since the original post but it's extremely barebones. Linuxcoin running off of a usb stick with no extra drives, 3 5970s clocked at 820/250, and 1 5830 at 780/250. I'm thinking I can replace that 5830 with another 5970 if I use powered pcie extenders.

ASICPuppy.net ASIC Mining Hardware and Accessories - GekkoScience DL580 Breakout Boards are In Stock!
1480703346
Hero Member
*
Offline Offline

Posts: 1480703346

View Profile Personal Message (Offline)

Ignore
1480703346
Reply with quote  #2

1480703346
Report to moderator
1480703346
Hero Member
*
Offline Offline

Posts: 1480703346

View Profile Personal Message (Offline)

Ignore
1480703346
Reply with quote  #2

1480703346
Report to moderator
Advertised sites are not endorsed by the Bitcoin Forum. They may be unsafe, untrustworthy, or illegal in your jurisdiction. Advertise here.
1480703346
Hero Member
*
Offline Offline

Posts: 1480703346

View Profile Personal Message (Offline)

Ignore
1480703346
Reply with quote  #2

1480703346
Report to moderator
1480703346
Hero Member
*
Offline Offline

Posts: 1480703346

View Profile Personal Message (Offline)

Ignore
1480703346
Reply with quote  #2

1480703346
Report to moderator
BTC guy
Sr. Member
****
Offline Offline

Activity: 378



View Profile
February 06, 2012, 05:01:01 AM
 #42

With core OC and memory DC 5970 draw might be a little more or a little less than 300w. I heard a good psu will actually give you more than what they are rated. I think 4 is pushing it but you might be able to get away with it. I was looking at this 1000w cooler master with 8 PCIE cables and it says max output is 1200w. It will probably give you 1250 but if you really push your psu or board like that you might have problems with or without the molex.

http://www.amazon.com/Cooler-Master-Silent-Modular-Supply/dp/B003O8J12I/ref=sr_1_2?ie=UTF8&qid=1328504102&sr=8-2
teflone
Hero Member
*****
Offline Offline

Activity: 770


You're fat, because you dont have any pics on FB


View Profile
February 10, 2012, 09:15:25 PM
 #43

Bump for awesome sale and crazy fast shipping!

Thanks BTC guy, that was here in 2 days since you pm'd me you shipped..

Smiley

For Canadians by Canadians: Canada's Bitcoin Community - https://www.coinforum.ca/
DeathAndTaxes
Donator
Legendary
*
Offline Offline

Activity: 1218


Gerald Davis


View Profile
February 10, 2012, 09:20:54 PM
 #44

PCIe Extenders with molex are needed on any dual GPU card. Your 5970's, etc, all need Molex cables to ensure you do not damage your motherboard from over draw.

This is just false.  All that matters is total load of PCIe bus.  BTW.  A 5870 pulls ~30W from the bus.  A 5970 pulls ~30W from the bus.  So why does a 5970 need a powered extender but a 5870 doesn't?
Inaba
Legendary
*
Offline Offline

Activity: 1260



View Profile WWW
February 10, 2012, 09:23:23 PM
 #45

30W may be spec, but I can tell you cards pull more than spec often, especially when overclocked.  I'll be happy to send you a couple motherboards to prove it.



If you're searching these lines for a point, you've probably missed it.  There was never anything there in the first place.
DeathAndTaxes
Donator
Legendary
*
Offline Offline

Activity: 1218


Gerald Davis


View Profile
February 10, 2012, 09:24:36 PM
 #46

With core OC and memory DC 5970 draw might be a little more or a little less than 300w. I heard a good psu will actually give you more than what they are rated. I think 4 is pushing it but you might be able to get away with it. I was looking at this 1000w cooler master with 8 PCIE cables and it says max output is 1200w. It will probably give you 1250 but if you really push your psu or board like that you might have problems with or without the molex.

1) 3x5970 pulls 800W DC which is about 870W AC at the wall (that includes rest of system too).  Mining w/ downclocked ram saves a lot of wattage.

2) Please never recommend someone pull 1250W from a 1000W PSU.  A 1000W PSU shouldn't pull more than 1000W MAX continually.  Ever.  Period.  If someone needs 1250W they need a 1250W PSU.  25% of rated power is a good way to burn down a home if the overcurrent protection fails.
DeathAndTaxes
Donator
Legendary
*
Offline Offline

Activity: 1218


Gerald Davis


View Profile
February 10, 2012, 09:26:59 PM
 #47

30W may be spec, but I can tell you cards pull more than spec often, especially when overclocked.  I'll be happy to send you a couple motherboards to prove it.

Well 75W is the spec but how do you know it pulled more than 30W?  5 card @ 30W = 150W.  If the MB wasn't designed to handle more than 120W you could easily kill the MB without any card pulling more than 30W.  I am not saying people shouldn't use powered extenders I was just trying to clear up some of the completely false claims.

Per the post I responded to 4x5870 @ 30W ea = no need for powered extenders.  A single 5970 @ 30W = MUST HAVE powered extender.  Huh  Wrong info is wrong info.

There is no hard and fast rule and people need to decide what they are comfortable with.  The reality doesn't fit into a sound bite but here are some ideas:

1) High end cards tend to draw less from the bus and more from the dedicated connectors because they are more reliable.  So the idea that a 5770 might be fine but a 5970 must be dangerous is actually backwards. 

2) The more CARDS (not GPU) you have installed the more you need to consider powered extenders.  6x5870s is going to draw more from the bus than 4x5970s despite having less GPUs.

3) The harder you overclock the more wattage you are going to pull and some share of that is going to come from the bus.

4) The more PCIe 1x slots you use the more you should consider powered extenders.  A card in PCIe x16 slots is going to pull the same from the bus extender or direct thus hopefully the designer planned on that wattage being used.  However a PCIe x1 slot normally doesn't pull more than 10W or less.  Using a board w/ lots of PCIe 1x slots may indicate the MB can't handle 150W+

5) Downclocking memory helps a lot and since 5000 series can go as low as 150Mhz (model dependent) they are going to pull less wattage than a similar caliber 6000 series card.

malevolent
can into space
Moderator
Legendary
*
Offline Offline

Activity: 1624



View Profile
February 10, 2012, 09:59:59 PM
 #48

With core OC and memory DC 5970 draw might be a little more or a little less than 300w. I heard a good psu will actually give you more than what they are rated. I think 4 is pushing it but you might be able to get away with it. I was looking at this 1000w cooler master with 8 PCIE cables and it says max output is 1200w. It will probably give you 1250 but if you really push your psu or board like that you might have problems with or without the molex.

http://www.amazon.com/Cooler-Master-Silent-Modular-Supply/dp/B003O8J12I/ref=sr_1_2?ie=UTF8&qid=1328504102&sr=8-2

Not sure how this one performs but Coolermaster PSUs are on average just ok, nothing special.
Pulling 1200W from a 1000W can be fine for running some benchmarks but not for everyday 2-6hour gaming use or worse - 24/7 mining. I would advise to keep the load @ 80, max 90%, I have burned my ATX 24pin connector in a VX550W after mining two weeks 24/7 with ~550W load. Got the connector replaced, working fine now, but the motherboard connector is now brown (was white;)).
Inaba
Legendary
*
Offline Offline

Activity: 1260



View Profile WWW
February 10, 2012, 10:13:32 PM
 #49

Quote
Well 75W is the spec but how do you know it pulled more than 30W?  5 card @ 30W = 150W.  If the MB wasn't designed to handle more than 120W you could easily kill the MB without any card pulling more than 30W.  I am not saying people shouldn't use powered extenders I was just trying to clear up some of the completely false claims.

Because it was either the only card in the system or it was a 5970 + 5870 (I can't recall on this specific board), so in either case, it was beyond spec, even if it was a two card system.  This particular motherboard only had two PCIe slots, so I know there was no more than 2 cards in there at any one time and I know it was not two 5970's, since the PSU on that machine was only a 500w PSU.


If you're searching these lines for a point, you've probably missed it.  There was never anything there in the first place.
shata
Member
**
Offline Offline

Activity: 92


View Profile
February 11, 2012, 06:40:42 AM
 #50

With core OC and memory DC 5970 draw might be a little more or a little less than 300w. I heard a good psu will actually give you more than what they are rated. I think 4 is pushing it but you might be able to get away with it. I was looking at this 1000w cooler master with 8 PCIE cables and it says max output is 1200w. It will probably give you 1250 but if you really push your psu or board like that you might have problems with or without the molex.

1) 3x5970 pulls 800W DC which is about 870W AC at the wall (that includes rest of system too).  Mining w/ downclocked ram saves a lot of wattage.

2) Please never recommend someone pull 1250W from a 1000W PSU.  A 1000W PSU shouldn't pull more than 1000W MAX continually.  Ever.  Period.  If someone needs 1250W they need a 1250W PSU.  25% of rated power is a good way to burn down a home if the overcurrent protection fails.

If you run 24/7 1kw full load you should probly take 5-10% capacitor aging into consideration also...so 900W for 1kw max. Most peak 1100w...good ones atleast so you have 200w buffer just in case.

1MwcmqQUBq3yRJU4BcieiQiViw4vFTrKjQ
BTC guy
Sr. Member
****
Offline Offline

Activity: 378



View Profile
February 18, 2012, 01:36:29 AM
 #51

Still have around 30 cables for sale.
BTC guy
Sr. Member
****
Offline Offline

Activity: 378



View Profile
February 29, 2012, 08:44:44 AM
 #52

Price lowered to 2 coins.
BTC guy
Sr. Member
****
Offline Offline

Activity: 378



View Profile
March 20, 2012, 12:11:23 AM
 #53

PLZ BUY RISERS
Pages: « 1 2 [3]  All
  Print  
 
Jump to:  

Sponsored by , a Bitcoin-accepting VPN.
Powered by MySQL Powered by PHP Powered by SMF 1.1.19 | SMF © 2006-2009, Simple Machines Valid XHTML 1.0! Valid CSS!