wow dude that's impressive for 280x especially without having to go crazy on the memclock. did you try modding the voltage in the bios with vbe7? although you probably wouldn't want to, you definitely found the sweet spot. dude you just made my day  do you get the same results with cgminer as sgminer? CGMiner + the optimized bin would not go over 760-770khs on any of the 4 cards. At this point, i am quite convinced that SGMiner scales in performance far more efficiently with increased clock rates than with CGMiner. It was the same story with my 13 7950s. i went from ~9.5mhs to ~10.4mhs with SGMiner + optimized 24k bin over CGMiner 2.11.4 + optimized 24k bin. I am not using the optimized .cl file either. You could say i made my day too. ;-) Cheers |
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i guess i will then.
do you know if i can run windows 7 from a 8gb usb stick?
Not a chance. Win7 install is ~25-27gb alone, unfortunately. 32gb would work, but no windows updates! As a side note, i just realized i am using your board (GIGABYTE GA-990FXA-UD3) in one of my 7950s rigs. It's purty  |
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Most excellent.
I would be extremely interested to know your driver version + SDK used.
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i wouldnt know how to do any of that, but i dont understand why im killing cards.
is it going to be better for me to use windows?
I always recommend Win7 x64 for <= 4 cards, or Win8.1 for > 4 cards . Linux is nice if you know exactly what you're doing in both setup and maintenance / troubleshooting, but you will find more assistance if you are on the Win platform. |
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Late last night I reinstalled the drivers + app sdk for both cards and rebooted, ran a steady 560 KH/s on the 270x and only 420 on the 7950 all night (still on). I messed with the clocks through cgminer, but the highest I could get it to run steady with no driver crashes was 1000/1500 @ 21712 concurrency and I 20, powertune 20.
Some people say 7950's shouldn't go over I 13 either because of mad HW errors, is that true? When my intensity is at 13, my hash is barely 320 KH/s. At I 20 I have no HW errors all night.
I somehow don't think I will get more than this though, either the cards just been OC'd to shit before me and/or ran real hot. Most people seem to get ~600 kh/s on these cards with those exact settings, or even less.
I did buy this off eBay which could explain it , but the seller sent me his settings (above) and said it should hit 580-600+ easily.... He didn't have an exact model number listed, but the device_ID in my device manager does match up to a 7950.
All the info he had listed was this "This is an unreleased 7950. I call it a 7950 LE because it only has 1596 shaders instead of the 1756 shaders of a normal 7950 other then that it's a normal 7950 with 3GB RAM 384bit 925mhz core and 1250mhz memory. The card overclocks good. I used it for litecoin mining for awhile and was able to get 600 Khash very easy."
About your 7950 "LE": I got a couple of those (off ebay), and they are odd beasts. Same 7870XT shader count, but the 384bit bus like the 79xx cards (unlike the 7870XT). Very odd. That being said, all of mine do at least 600khs+, but i've had little luck getting them above the ~620khs mark whereas the 'normal' 1792 shader 7950s i have @ 680-700khs. About 7950s with intensity over 13: 7950s love 19+ intensity. You just need a high enough TC value (24000) works great to support the higher intensity. 7970s are the ones which like the i-13 settings (which is also weird, as it is functionally the same architecture as the 7950, but with a couple extra shader blocks enabled). About your hashrate issues: I am nearly 100% positive that if you pulled out that 270x, your 7950 would clock back up to ~600khs. CGMiner really hates tuning for multiple types of cards in the same config file. If i were in your situation, i would give SGMiner a shot as the dev behind it has stated he has fixed issues like that (specifically the 7970 + 7950 issue with gpu threads of different sizes). If you do use CGMiner, use one of the smaller optimized .bin (to work with the 270x) and make sure your config TC setting matches. My farm gained an entire 1mhs over 13 7950s going to sgminer + optimized bin. |
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On first glance, remove the vectors line (not used in scrypt) + the shaders line (TC overwrites this value).
I am also not sure about this, but i do believe sgminer can work with BAMT. I would give sgminer a shot with the 24k TC optimized bin. Just set your TC to 24k in your config to match.
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XFX 7950 after a bios undervolt to 1.09v still runs ~8c warmer with good spacing / air circulation than all my other non-blower model 7950s.
Seriously, avoid XFX 79xx cards.
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OP, your actual miner config would be a good starting point for diagnosis.
32bit is a big problem though.
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Posting this result because i see people selling configs. Put you out of biz! So, for all the 280x owners out there.... Cards: 4 x MSI GAMING 280x LOCKED VOLTSBoard: ASUS M5A99FX PRO R2.0 (3 up on powered risers, 1 down in board) PSU: SilverStone 1500w "Strider" series. Ram: 8GB Card Settings: Stock volts / Clocks: 1168 / 1500 Bios:  Software Platform: Win7 x64 / Cat. 13.4s + 2.9 APP SDK / SGMiner 4.0.0 + Optimized .bin 8192 + CGWatcher. I am not using the optimized .cl file.SGMiner code: --no-submit-stale --thread-concurrency 8192 --gpu-fan 90 --intensity 13 -w 256 -g 2 --api-listen --api-allow 127.0.0.1 --gpu-engine 1168 --gpu-memclock 1500 --gpu-powertune 20 --lookup-gap 2 A note about the config and screenshot: You must include --lookup-gap 2 / -w 256 for the optimized bin to work. The TC must also match as well in your config (or else sgminer will not use the optimized one). The WUs are not stabilized but they will even out to apx 93% of the aggregate hashrate per card. YMWV on the clockrates. These MSI cards are volt-locked. Power: 1365w from the wall (on a 1500w PSU). Minus ~140w idle from the system, ~1300 for the 4 cards = 325w per card. Screencap: |
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Very cool, trying it out now!
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Whats the W per 290 ? (250w)
i dont see were is the problem
290s are 300w cards, at least at stock volts / clocks. |
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850w for 3 290s?
Have fun with that.
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No clue, not on linux and never used bamt.
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How's your VRM temps?
You don't need ram that fast to get where you need to go!
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please I need cfg for sapphire cgminer 5x r9 290 tri-x oc
snip Hey atp, what's the difference between sgminer and cgminer? Just a guess, but is sgminer designed for scrypt and has support following the cgminer 3.7.2 version? SGMiner is the logical gpu-only extension of cgminer, but maintained by someone else. SGMiner fixes some very critical issues with cgminer and gpus. I highly recommend it, especially if you have 7950s. My WUs have never looked better on them with the optimized bins. |
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280x's get to 300w in a hurry.
CX430 = $40.
280x = $400.
Not worth the risk if you blow something up.
280x get to 300w? What card are you running that gets to 300w? As I said, mine started at 270w, and after undervolting, dropped down to 230w per GPU. XFX R9 280x's at stock volts / clocks because mine came locked. Undervolting is another matter. I did not assume the OP would be doing this. However, to recommend a card that must be undervolted to maintain a safe load on the PSU is reckless. |
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Good luck getting these units out of the hands of group-buyins and farmers. They will be buying these units by the thousands.
Interesting development nonetheless. We may see some cheap GPUs now!
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