Used Gpus?

mikey
mikey
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archae86 wrote: Tom M

archae86 wrote:

Tom M wrote:

archae86 wrote:
I've got a used 5700 waiting for me to eBay it.  Looking at recent completed sales, it appears I might get $850 out of it.

Peter,

The prices may have slumped already :/

The auction closed just now for $825.  I had four different bidders bid $750 or more, so there is still some interest out there.

My listing specifically stated "primarily used to search for Gamma-Ray Pulsars by running distributed computing tasks sent out by the Einstein at Home project."  Maybe that discouraged some, but not all.

Congratulations!!!

Joseph Stateson
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I just looked at computer

I just looked at computer statistics.   A lot of Radeon VII and not a single RX 6800xt or 6900xt.

 

When released those boards were in the $600-800 price but not anymore

I see Newegg has some 6800xt  and 6900xt available.  Is there a problem with these boards that they do not show up on the top computer statistics list?  They are ranked pretty high up according to specs.

archae86
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JStateson wrote:I just looked

JStateson wrote:
I just looked at computer statistics.   A lot of Radeon VII and not a single RX 6800xt or 6900xt.

There is an RX 6800XT at position 47, and an RX 6800 at position 48 sorted by RAC.  Both of these are running 24/7 on GPU Gamma-ray pulsar, but both are running under heavy throttling for summer power reduction (specifically they are running under MSIAfterburner control to limit core clock to a maximum of 1200 MHz).

Also, neither of those two machines has CPU support nearly at the top end of possibilities.

It is a reasonable inference that none of the Big Navi cards currently running on Einstein are running at anywhere near the full dedication that the top VII card machines are running.

Yes, I own and operate the two machines I mentioned.  No, they are not so fast as a VII (I used to run one of those), but they are not as far below as a quick read of the top machines might lead one to mistakenly conclude.

 

Joseph Stateson
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archae86 wrote:There is an

archae86 wrote:

There is an RX 6800XT at position 47, and an RX 6800 at position 48 sorted by RAC.  Both of these are running 24/7 on GPU Gamma-ray pulsar, but both are running under heavy throttling for summer power reduction

 

Thanks, I missed that.  I just sold a number of gtx boards on ebay and am planning on selling some unused AMD (rx560,570).  I was looking at getting a new board that can do FP64 well which is a big + over at Milkyway.  Newegg does not even list the Vii but the 6800xt is in my price range and I might go for the 6900xt.  I also did not see any of those boards listed under the stats leaders over at MW.  I went through 140 systems but might have missed one.  Maybe the problem is supply as well as price.

 

[edit]

Your work units are taking 11 minutes.  Is the board doing two concurrent WUs?

archae86
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JStateson wrote:Your work

JStateson wrote:
Your work units are taking 11 minutes.  Is the board doing two concurrent WUs?

The RX 6800 XT host is currently running 4X, and throttled to 1200 MHz maximum.  It has a real 6-core CPU, and very little distraction, but the cores on that CPU are very much on the low-power, low-performance end for the generation.

The RX 6800 host is currently running 3X, and is also throttled to 1200 MHz maximum.  It has a real 4-core CPU, of somewhat earlier generation, but higher in range than the other.  It also is hindered a bit by the distractions of being my main daily use machine (I'm typing on it now).

When I first heard of the Big Navi specs, I thought the 6800 XT would be the "sweet spot" for Einstein use, as it seemed to offer materially more resources than the 6800 for not all that much extra money.  But I think actual operating experience on Einstein GRP suggests that the 6800 is probably to be preferred.  I think the 6900 XT fails to be competitive on price/performance or power efficiency in most assessments.

I'm afraid I paid over list to buy both my 6800 and my 6800 XT from non-primary sources.  The good news is that I sold off four 5700 Navi cards that had been running in those machines, some at rather far over list, so the matter worked out OK for me.

The weather has turned cooler.  So when I learn my monthly power consumption in a week or so, I may turn up the wick a little on one or both of these systems.  

 

Joseph Stateson
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archae86 wrote: RX 6800

archae86 wrote:

RX 6800 host is currently running 3X, and is also throttled to 1200 MHz maximum. 

---

When I first heard of the Big Navi specs,

 

I was unaware the "Navi" referred to these boards till you mentioned it here.  When I looked at the leaders over at Milkyway I spotted some rather weak results but the card was the HD 6800 which is much older than the RX 6800 and neither quite up to the XT version.

 

I wish they would not reuse the same numbers.   I once bought an intel E3-1230 on ebay not realizing it was a v2 and I needed a v3 and the socket was different. 

Dana Riecken
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NewEgg used to have those

NewEgg used to have those refurbished

mikey
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JStateson wrote: archae86

JStateson wrote:

archae86 wrote:

RX 6800 host is currently running 3X, and is also throttled to 1200 MHz maximum. 

---

When I first heard of the Big Navi specs,

 

I was unaware the "Navi" referred to these boards till you mentioned it here.  When I looked at the leaders over at Milkyway I spotted some rather weak results but the card was the HD 6800 which is much older than the RX 6800 and neither quite up to the XT version.

 

I wish they would not reuse the same numbers.   I once bought an intel E3-1230 on ebay not realizing it was a v2 and I needed a v3 and the socket was different. 

I too wish they would not use the same numbers over and over, it makes it hard to know what you are getting especially when the seller doesn't or says they don't either.

Ian&Steve C.
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Radeon VII and RX5700 GPUs

Radeon VII and RX5700 GPUs still command a premium from the mining crowd. That's why prices are generally inflated.

 

GPUs that have less than 4GB VRAM (ETH DAG now requires more than 4GB) or newer models that are LHR (low hash rate, nvidia limiter) don't command nearly as much.

 

anyone buying these models intending to use for mining, probably doesn't care it's use history as long as it still works. I've never had ANY BOINC project degrade or damage any GPU though, even with aggressive overclocking, so it's really not a concern there. Any modern GPU will throttle itself to avoid damage, it's really hard to kill a GPU that isn't otherwise defective already. I've had GPUs that ran SETI for YEARS at 95C because my father put them right next to each other in a tight case and never checked the temps lol. re-pasted them and tested them and they performed good as new.

_________________________________________________________________________

GWGeorge007
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Ian&Steve C. wrote:Radeon

Ian&Steve C. wrote:

Radeon VII and RX5700 GPUs still command a premium from the mining crowd. That's why prices are generally inflated.

GPUs that have less than 4GB VRAM (ETH DAG now requires more than 4GB) or newer models that are LHR (low hash rate, nvidia limiter) don't command nearly as much.

anyone buying these models intending to use for mining, probably doesn't care it's use history as long as it still works. I've never had ANY BOINC project degrade or damage any GPU though, even with aggressive overclocking, so it's really not a concern there. Any modern GPU will throttle itself to avoid damage, it's really hard to kill a GPU that isn't otherwise defective already. I've had GPUs that ran SETI for YEARS at 95C because my father put them right next to each other in a tight case and never checked the temps lol. re-pasted them and tested them and they performed good as new.

That is some good, compelling info on what a GPU can take as far as BOINC is concerned.  I've re-pasted my 2060 GPU along with getting some Thermalright Thermal Pads with 12.8 W/mK just 0.5 mm thicker and it's temps are roughly ~20॰C COOLER while running BOINC projects such as Einstein.

It leads me to believe that Keith Myers is CORRECT after all that I may have a PSU about to go south because of some errant lockups and/or shut downs.  It runs at 12.2v (using GkrellM) without BOINC running, and drops to 12.0v - 11.9v with BOINC.  It hasn't shut down yet without BOINC running, but if I start BOINC it then drops in voltage and shuts down or locks up within ~0.5 - 5.0+ hours, even after re-pasting my GPU.

.....[EDIT].....

I even have gone as far as setting my Graphics Clock Offset to -200 so that it runs at the Nvidia max clock settings of 1680MHz in Nvidia X-Server Settings.

George

Proud member of the Old Farts Association

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