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421  Alternate cryptocurrencies / Mining (Altcoins) / 5x280x Rig | 1750w will cut it? on: March 05, 2014, 04:00:45 PM
hello guys.

planning on buying 5x gigabyte 280x's and getting them together with Asrock h81 PRO BTC.
along with them:

1xCoolermaster V1000 1000W - MB+CPU+3x280x
1xCorsair CX750 750W - 2x280x

do you think its enough? the thing is is heard that no matters who powers the gpu the gpu will take about 50w from the PSU connected to the board. is this a problem?

thank you
422  Alternate cryptocurrencies / Mining (Altcoins) / Re: New BIOS in Sapphire TOXIC r9 280x decrease hashrate ? on: March 04, 2014, 07:12:48 PM
listen guys this is HUGE PROBLEM! i'm planning on buying 10 toxics tomorrow! you suggest not to? i heard the VAPOR does problems aswell!

what now?!? Huh
423  Alternate cryptocurrencies / Mining (Altcoins) / Re: New BIOS in Sapphire TOXIC r9 280x decrease hashrate ? on: March 03, 2014, 04:31:43 PM
guys i'm planning to buy 10 of those toxic! how do i know which model is the right one? please help
424  Alternate cryptocurrencies / Mining (Altcoins) / Re: Help | Corsair CX750w + 2xR9 290 CRASH! on: March 03, 2014, 11:52:10 AM
those are my settings. STOCK!
Quote
-g 1 -w 512 --lookup-gap 2 --thread-concurrency 32765 -I 19 --gpu-fan 85 --gpu-engine 947 --gpu-memclock 1250 --temp-overheat 92 --temp-cutoff 96

its so weird the rig worked for couple of weeks smooth with powertune+20! it means that the psu should do the job right? now when i'm on zero it crashes!
please help..

forgot to mention. when the rig crash, i can't power it on i need to unplug the AC and plug it again. and the motherboard lid is still on after the crash.

It's not that weird. If memory serves me right, than at stock values a single R9 290 eats about 330w-350w, 2 of those will make it 660w-700w and when you add cpu, mobo and ram on top of it you exceed the limits of your PSU. A quality PSU can provide more power than it lists as, but it's not meant to exceed its limit for long periods of time (weeks in your case).

I can't say for sure if your PSU is toast, but try undervolting your R9 290 with stock clock speeds and see what you get.

A really conservative settings I used to have were 911/1250 with voltage down to 1.023v, those gave me like 225w per card but hashed at like 800KH/s.

thank you my friend. it seems i need to change my PSU.
i tried now your settings and i get around 700KH/s. maybe i can push it to 750? what would you change to make it stable
425  Alternate cryptocurrencies / Mining (Altcoins) / Re: Help | Corsair CX750w + 2xR9 290 CRASH! on: March 03, 2014, 11:26:53 AM
those are my settings. STOCK!
Quote
-g 1 -w 512 --lookup-gap 2 --thread-concurrency 32765 -I 19 --gpu-fan 85 --gpu-engine 947 --gpu-memclock 1250 --temp-overheat 92 --temp-cutoff 96

its so weird the rig worked for couple of weeks smooth with powertune+20! it means that the psu should do the job right? now when i'm on zero it crashes!
please help..

forgot to mention. when the rig crash, i can't power it on i need to unplug the AC and plug it again. and the motherboard lid is still on after the crash.
426  Alternate cryptocurrencies / Mining (Altcoins) / Help | Corsair CX750w + 2xR9 290 CRASH! on: March 03, 2014, 10:26:08 AM
hey guys.

a month ago i bought a rig with a corsair cx750 and 2x290. it worked perfectly at 830khash and powertune+20 for a month.
didn't know back then that probably the psu isn't strong enough and the rig started to crash a week ago after 10 min of mining.
i lowered the powertune to zero but it still crashes!
can there be any other reason for the crashing? anyone else expiriencing this?
i'm really annoyed by this there must be a way to get it working until i get a new psu.

thank you guys!
427  Other / CPU/GPU Bitcoin mining hardware / Faster shipping website for PCI-E Rinsers? on: February 24, 2014, 01:42:40 PM
hey guys

ebay is taking ages!
i live in Israel

any of you know for a fast shipping and valuable site that sells rinsers from 1xto16x and 16xto16x?
maybe other equipments like H81 PRO BTC? etc..

thank you!
428  Alternate cryptocurrencies / Mining (Altcoins) / 2x R9 290 + Corsair CX750 W | Crash! help on: February 20, 2014, 01:51:37 PM
hello guys

recently bought this rig with 2x r9 290 and a corsair cx750w

for the first two weeks it worked great with powertune+20. now it crashes every 10 minutes. i lowered the powertune to +10 and now its stable and the khash still hits 820-830k

is it ok? do we even need the powertune? doesn't it saves money on electricity in lower powertuning? or should i invest in a new psu?

thank you guys.BTC
429  Alternate cryptocurrencies / Mining (Altcoins) / Can't top 600Khash R280x :( on: February 02, 2014, 07:04:45 PM
somethings wrong guys! i had 700+ khash working perfectly with my 280x a week ago.
after using a R290 for a few days for a few tests i returned to my 280x and put on my origina scrypt:

-g 2 -w 256 -I 13 --lookup-gap 2 --thread-concurrency 8192 --gpu-engine 1030 --gpu-memclock 1500

but this is all i get!



a week ago i had this!



what have changed?! please help me thank you so much!
by the way i upgraded to 14.1 Mantle Driver
430  Bitcoin / Development & Technical Discussion / GPU fan speed won't change after closing Cgminer on: February 01, 2014, 10:26:07 AM
 Undecided

Hey guys. running my new R290 with cgminer 3.7.2 on windows 8.1
the mining procedure works great but after i close cgminer to return to my work the fan speed of the gpu stays high on 70% like i set on my scrypt.
why does it happen? even when i try to change the speed through CATALYST it won't change! and its LOUD! this didn't happen with my 280x that i had in the same system 2 days ago!

any help?

thank you Smiley
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