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Author Topic: Record hashrate for a 5850? (me, showing off)  (Read 13833 times)
Tx2000
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July 02, 2011, 01:32:49 AM
 #21

Reference, mcw60 block, stock plate w/80mm fan mounted in vrm location.
Crippled one already awaiting new smd capacitor for repair. Didn't have fan mounted on it. Considering piggy backing some capacitors for longevity.


That's a good idea, didn't really think about cooling the back side of the card to attack VRM heat.  I am using 2 120mm fans ziptied to my Twin Turbo over the stock plate; waiting on some thermal tape to come by so I can replace the flakey stock stuff.
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Jack of Diamonds
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July 02, 2011, 03:01:13 AM
 #22

2.) could VRM temps be how I killed my brand new Sapphire 5830?  I was running at 1.2v with 100% fanspeed, and it died after two weeks

Doesn't matter how high the fan speed is, you are driving 20% overcurrent to the GPU chip and overloading the VRM's. Not worth it for the small increase in hashing rate.

Also, you can't RMA oc'ed cards. Or you can, but you'll just end up paying shipping and not getting a new GPU in return because they test cards.
Overclocking and running non-stock voltages voids the warranty.

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July 02, 2011, 03:22:53 AM
 #23

Also, you can't RMA oc'ed cards. Or you can, but you'll just end up paying shipping and not getting a new GPU in return because they test cards.
Overclocking and running non-stock voltages voids the warranty.

Please explain the testing manufacture's use to determine whether overclocking has occurred or not.


Quote
Doesn't matter how high the fan speed is, you are driving 20% overcurrent to the GPU chip and overloading the VRM's. Not worth it for the small increase in hashing rate.

1.163v to 1.2v is not a 20% increase, more like 3%

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July 02, 2011, 03:47:19 AM
 #24

Also, you can't RMA oc'ed cards. Or you can, but you'll just end up paying shipping and not getting a new GPU in return because they test cards.
Overclocking and running non-stock voltages voids the warranty.

Please explain the testing manufacture's use to determine whether overclocking has occurred or not.

That's likely a trade secret to deter RMA fraud. Still, you can google warranties being denied even by just removing stock coolers, or fans (that should just be 3-pin connectors not transmitting data at all).

They can probably measure if OV was applied to the voltage regulator or GPU chip, nobody's going to be sending them working cards so they obv. have tools to inspect dead ones physically

Quote
20% increase

I have some 58xx cards that run at 1.0xxx instead of 1.1xx, was basing it on that.

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July 02, 2011, 04:13:26 AM
 #25


They can probably measure if OV was applied to the voltage regulator or GPU chip, nobody's going to be sending them working cards so they obv. have tools to inspect dead ones physically


I have some 58xx cards that run at 1.0xxx instead of 1.1xx, was basing it on that.

You based everything off assumption's or wrong information.

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July 02, 2011, 04:39:35 AM
 #26

You asked for the symptoms - it acted like the computer's PSU was dead, until I removed the 5830, then the computer booted normally.  (the lights would flick on for a second, and every fan blade in the system turned about 1/4 turn and then it went dead again)

Basically I'm assuming the overcurrent protection was kicking in.

As to Jack of Diamonds - if running a card at 1.2v instead of 1.163v with 100% fan really was the sole cause of it dying in 2-3 weeks, then I submit to you that it would have died on me in a month or two at stock voltage.  Also, it's not a "small increase in hashing rate" , the card was producing ~305 MH/s instead of 240-250

All rates with Phoenix 1.50 / PhatK
------------------------------------------------------------------------------------------------------------------------------
5850 - 400 MH/s  |  5850 - 355 MH/s | 5830 - 310 MH/s  |  GTX570 - 115 MH/s | 5770 - 210 MH/s | 5770 - 200 MH/s
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July 02, 2011, 05:43:00 AM
 #27

Hard to say what's wrong with the symptoms you describe without knowing more or having it in my hands. Take the card apart and visually inspect it closely. If there are no signs of damage then not much you can do unless you learn how to test individual components on the pcb. The fact that the card died so quick means even at stock it would have died within a short amount of time regardless. Poor quality on the manufactures part for that particular card, it happens to any though once in awhile. What means did you use to able extra voltage? TrixX?

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July 02, 2011, 11:49:32 AM
 #28

Yes, TriXX

All rates with Phoenix 1.50 / PhatK
------------------------------------------------------------------------------------------------------------------------------
5850 - 400 MH/s  |  5850 - 355 MH/s | 5830 - 310 MH/s  |  GTX570 - 115 MH/s | 5770 - 210 MH/s | 5770 - 200 MH/s
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July 04, 2011, 05:20:01 PM
 #29

Also, you can't RMA oc'ed cards. Or you can, but you'll just end up paying shipping and not getting a new GPU in return because they test cards.
Overclocking and running non-stock voltages voids the warranty.

Please explain the testing manufacture's use to determine whether overclocking has occurred or not.

Saphhire just RMA'd my 5870 that I toasted. I didn't touch voltages but I certainly OC'd(980) the hell out of it. Best part is that it was only at 70c with .5amp fans blowin on the backs and front of the cards.

These "you can't rma an OC'd xxxx" is just a myth the manufacturers keep putting out because I doubt they CAN test the card. I'm sure it's some chinese guy who throws the pc part into a machine, the machine goes "it's busteded" and he go's ok! And sends a new one back.

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July 04, 2011, 06:17:51 PM
 #30

It is possible to find out whether the card was overclocked, but as far as I know, only if the voltage(s) were increased.
The problem is that it isn't easy and it's time-consuming, so most people can successfully RMA their cards even after extreme O/C.
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July 04, 2011, 07:33:40 PM
 #31

Also, you can't RMA oc'ed cards. Or you can, but you'll just end up paying shipping and not getting a new GPU in return because they test cards.
Overclocking and running non-stock voltages voids the warranty.

Please explain the testing manufacture's use to determine whether overclocking has occurred or not.

Saphhire just RMA'd my 5870 that I toasted. I didn't touch voltages but I certainly OC'd(980) the hell out of it. Best part is that it was only at 70c with .5amp fans blowin on the backs and front of the cards.

These "you can't rma an OC'd xxxx" is just a myth the manufacturers keep putting out because I doubt they CAN test the card. I'm sure it's some chinese guy who throws the pc part into a machine, the machine goes "it's busteded" and he go's ok! And sends a new one back.

This is what I don't understand.  If you overclock your card but you don't touch the voltage and you keep the card cool (say 50*C), what causes it to "toast"?

I know that one of my 5850's goes over 1000MHz on stock voltage (1.0875V) and is able to sustain it for hours (I haven't done a 24 hour test yet).  Everyone else on the forum likes to raise the voltage before bringing the clocks that high and I wonder what I'm missing.

I don't want to kill my card, indeed I'd like it to last a long time, but I feel like it would be wasteful to keep the card at stock clock (725MHz) or even just at 850MHz or so.
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July 05, 2011, 01:26:40 AM
 #32

 i get 410 MH/s easy at 1.175v

It is pitch black. You are likely to be eaten by a grue.

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July 05, 2011, 12:56:18 PM
 #33

Hey guys, I've had a few people say that my 400 MH/s hash rate must be a fairy tale, I wanted to post a pic eventually, but now seemed like a good time to post a pic of 1000 MHz core with a private beta phatk kernel , my highest hashrate yet!  

I'm too scared to go over this voltage, I don't want to push it too far





What is the current record for a 5850? (or at least, one on air/reference cooler)

What's that utility you have there that lets you adjust clock speeds and mem speeds? (program that says sapphire in the screengrab) As I could really use the help for my HD 6950 card

If I can't unlock shaders,what would the optimal settings be for my card for mining?

Thank you

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July 05, 2011, 01:04:24 PM
 #34


What's that utility you have there that lets you adjust clock speeds and mem speeds? (program that says sapphire in the screengrab) As I could really use the help for my HD 6950 card

If I can't unlock shaders,what would the optimal settings be for my card for mining?

Thank you

Thats Sapphire Trixx (not limited to sapphire cards only) , it allows for overvolting on some odd out cards. The interface isn't as good as afterburner however.
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July 05, 2011, 02:22:22 PM
 #35

hi

i can not reach over 1000 MHz  on Trixx how do you do to have more?
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July 05, 2011, 04:32:40 PM
 #36

hi

i can not reach over 1000 MHz  on Trixx how do you do to have more?

It's GPU specific. Some can be pushed as high as 1075mhz, and others will start freezing even at 910.

If it's a 'sour GPU' so to speak, then it simply can't go past a certain point no matter how much voltage is applied.
Though usually the premium ones are binned for the top of the food chain (best 5870 cores to the 5970, best 6970 cores to the 6990)

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July 05, 2011, 04:55:28 PM
 #37

ok with my actual HD 5850 I reah 395MH/s with 1000/300 at 1200mV (80°C)

I wanted to push a little and reach 400MH/s
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July 05, 2011, 11:12:45 PM
 #38

hi

i can not reach over 1000 MHz  on Trixx how do you do to have more?

I used AMDOverdriveCtrl and Catalyst 11.6 (I'm on Linux).

Edit: You can also use aticonfig directly, all that's needed is Catalyst 11.6.  To set the clock rate to 1020 say on your first card use:
aticonfig --adapter=0 --odsc=1020,0
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July 06, 2011, 11:08:28 AM
 #39

ok with my actual HD 5850 I reah 395MH/s with 1000/300 at 1200mV (80°C)

I wanted to push a little and reach 400MH/s

You can probably reach 400MH/s by playing with the software rather than pushing the card further.  I've found setting which will give me 413 MH/s for a 1000MHz 5850 but you might have to pull that back a bit if your rig is not a dedicated miner.  Let me know if you want details.

Do you have the latest miner kernel code?  There have been some improvements in the last few weeks.
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July 06, 2011, 11:27:07 AM
 #40

ok with my actual HD 5850 I reah 395MH/s with 1000/300 at 1200mV (80°C)

I wanted to push a little and reach 400MH/s

You can probably reach 400MH/s by playing with the software rather than pushing the card further.  I've found setting which will give me 413 MH/s for a 1000MHz 5850 but you might have to pull that back a bit if your rig is not a dedicated miner.  Let me know if you want details.

Do you have the latest miner kernel code?  There have been some improvements in the last few weeks.



I use GUIMiner (last version) with those option :
-v -w 256 VECTORS BFI_INT AGGRESSION=13 FASTLOOP=false

Is there something to change?
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