Optimizing HD5770?

[karuso]

I am using an HD5770 running at 920/1320@88°C=159mhashs

I read that some people are gettings 200-220mhashs with the HD5770.

Is there a way to optimize it using the stock fan?  It's the Sapphire edition btw.
The high temp is also scaring me.

I am also thinking about getting a second 5770 for crossfire. How many mhashs would i get with it? Couldnt find any multi-gpu benchmarks. Would this make sense or would it be wiser to sell it and get a new gpu instead?

Thanks in advance for the answers

[grue]

lower mem clock.

[karuso]

thanks for the tip
i set the mem clock to default (1200) and it didnt affect the mhashs rate at all. So i guess that it has no significance for mining?

[grue]

thanks for the tip
i set the mem clock to default (1200) and it didnt affect the mhashs rate at all. So i guess that it has no significance for mining?

i meant MUCH lower
https://forum.bitcoin.org/index.php?topic=4292

[Seraphim401]

I have 2 HD 5770's in cf giving me a combined hash of ~405 Mh/s.
Both running @960/150.
Flags for gpu one: -v -w 128 -f 60
Flags for gpu two:   -v -w 128 -f 0
Used MSI afterburner to lower mem clock.

[karuso]

Thanks but i cant adjust it any lower than 600 with afterburner. Why?

[Seraphim401]

Thanks but i cant adjust it any lower than 600 with afterburner. Why?

Add to following under [ATIADLHAL] in the msiafterburner conf file:
 
EnableUnofficialOverclocking   = 1
UnofficialOverclockingEULA   = I confirm that I am aware of unofficial overclocking limitations and fully understand that MSI will not provide me any support on it

UnofficialOverclockingMode   = 2
AccessibilityCheckingPeriod   = 0

[karuso]

Thanks but i cant adjust it any lower than 600 with afterburner. Why?

Add to following under [ATIADLHAL] in the msiafterburner conf file:
 
EnableUnofficialOverclocking   = 1
UnofficialOverclockingEULA   = I confirm that I am aware of unofficial overclocking limitations and fully understand that MSI will not provide me any support on it

UnofficialOverclockingMode   = 2
AccessibilityCheckingPeriod   = 0

my config doesnt have those lines

should i just add them?

[Seraphim401]

Thanks but i cant adjust it any lower than 600 with afterburner. Why?

Add to following under [ATIADLHAL] in the msiafterburner conf file:
 
EnableUnofficialOverclocking   = 1
UnofficialOverclockingEULA   = I confirm that I am aware of unofficial overclocking limitations and fully understand that MSI will not provide me any support on it

UnofficialOverclockingMode   = 2
AccessibilityCheckingPeriod   = 0

my config doesnt have those lines

should i just add them?

Yes

[EpicNoob]

n/a

[tunatime]

don't oc you card any more 88c is already hot go dl guiminer and use  the flags -v -w128 should bring you up to about 170ish or so. i have 2 5770 that put out 200+Mhs a card i run them at 970core to get to the 200 you need a core of at least 960 and probably a v bump to but dont do this as you card is way to hot for more v

[karuso]

Before overclocking change thermal paste, sapphire uses bad one. On my cards (Sapphire HD5830 & HD5570) this reduced temperature a few degrees.

Yeah i just opened it and it looks like they used too much paste
will change it in a few days.



Ah i was editing the wrong cfg. I edited the one in profiles instead. Now i edited the right one which was still missing the "EnableUnofficialOverclocking" line and restarted my computer. Still cant edit lower than 600 though. Whats wrong?






I applied the flags already and am getting 195 now. And the temp is now at 60(100%)-70(50%)

[EpicNoob]

n/a

[karuso]

You can set 600Mhz, then close Afterburner and run it again, after that you will be able to set lower clock.
Nice trick?

Thanks it works! But now i cant lower the gpu speed to less than 938?

[Seraphim401]

Repeat the step until the desired clock speed has been reached.

[EpicNoob]

n/a

[karuso]

Thanks works now

[Man From The Future]

I have 2 HD 5770's in cf giving me a combined hash of ~405 Mh/s.
Both running @960/150.
Flags for gpu one: -v -w 128 -f 60
Flags for gpu two:   -v -w 128 -f 0
Used MSI afterburner to lower mem clock.

Is that just because you have f 60 on one?

You should get 220 each, if you do what http://www.smpake.com/?p=59 says... :S

(I only get 200 on one, as for obvious reasons, I don't use a high aggression on the one for my real monitor )

[karuso]

I have 2 HD 5770's in cf giving me a combined hash of ~405 Mh/s.
Both running @960/150.
Flags for gpu one: -v -w 128 -f 60
Flags for gpu two:   -v -w 128 -f 0
Used MSI afterburner to lower mem clock.

Is that just because you have f 60 on one?

You should get 220 each, if you do what http://www.smpake.com/?p=59 says... :S

(I only get 200 on one, as for obvious reasons, I don't use a high aggression on the one for my real monitor )

How does he get the 5770 to work @1ghz anyway? Mine crashes instantly if i try to set it to more than 920

[karuso]

I have 2 HD 5770's in cf giving me a combined hash of ~405 Mh/s.
Both running @960/150.
Flags for gpu one: -v -w 128 -f 60
Flags for gpu two:   -v -w 128 -f 0
Used MSI afterburner to lower mem clock.

Is that just because you have f 60 on one?

You should get 220 each, if you do what http://www.smpake.com/?p=59 says... :S

(I only get 200 on one, as for obvious reasons, I don't use a high aggression on the one for my real monitor )

How does he get the 5770 to work @1ghz anyway? Mine crashes instantly if i try to set it to more than 920

bump