4870 Overclocking Thread

[purecain]

when i first read this i said to myself ''of course, perfect short term solution''...

problem is getting it to work... so i could do with some varification that this actually does work before i invest hours experimenting...

[annihilat0r]

painkilla: I did exactly what you said, but after I set the clock to 800 and close AMD clock tool and load the profile it doesn't speed the fan up.

Does Flashing the BIOS void the warranty of those cards? I mean, has any of you tried to RMA it after BIOS flashing and got the answer "bugger off"?

[NKD]

flashing a bios on any ati card voids the warranty, only evga lets you mess around as long as you don't physically damage the card. but I believe if the cause of your card dying is the bios flash you did, you should not rma from an honest stand point, but even if you flashed the bios and the reason for your card dying is someting else than you should just rma the card, and one thing for sure, if you told them you flashed the bios and got real honest they would most likly hit you in the head with a hammer and wont honor your warranty, if you flash it back to original bios and send it back, I am sure you will be fine.

[erocker]

So did he just make it up or what?!

[AriciU]

I can't seem to set the clocks for my second card anymore with AMD GPU tool. It says set clock failed when i try to do the second card

[painkilla]

i have to say i do have prblems enabling it right now after enabling OC and got fanspeed up. Then quit reset OC and start fanprofile for lowspeed fan. Sinds then i cant enable the fanspeed after OC. I can tell i works wonders but just not always. Il post images soon of it working

 <Feature name="CoreClockTarget_0">
          <Property name="Want_0" value="50000" />
          <Property name="Want_1" value="50000" />
          <Property name="Want_2" value="75000" />
        </Feature>
        <Feature name="MemoryClockTarget_0">
          <Property name="Want_0" value="90000" />
          <Property name="Want_1" value="90000" />
          <Property name="Want_2" value="90000" />
        </Feature>

Here is the link with all information:

http://forums.guru3d.com/showthread....69#post2751569

[erocker]

i have to say i do have prblems enabling it right now after enabling OC and got fanspeed up. Then quit reset OC and start fanprofile for lowspeed fan. Sinds then i cant enable the fanspeed after OC. I can tell i works wonders but just not always. Il post images soon of it working

 <Feature name="CoreClockTarget_0">
          <Property name="Want_0" value="50000" />
          <Property name="Want_1" value="50000" />
          <Property name="Want_2" value="75000" />
        </Feature>
        <Feature name="MemoryClockTarget_0">
          <Property name="Want_0" value="90000" />
          <Property name="Want_1" value="90000" />
          <Property name="Want_2" value="90000" />
        </Feature>

Here is the link with all information:

http://forums.guru3d.com/showthread....69#post2751569

Most of us have seen that link weeks ago! Where did you come up with deleting the clock information to make it work? It doesn't.

[painkilla]

the funny thing is i got it from this forum. Just dont know which thread something with gpu-z in the title.

it worked again this time. i did the following:

1. enable OC with amd gpu tool
2. load fanspeed profile without closing amd tool.

810/1025 with 70% fanspeed profile



and a 820/1050 OC with 45% fanspeed with amd tool still open:

[Caveman787]

So are you gonna have to leave AMD Tool open? or will it save the settings?

[painkilla]

So are you gonna have to leave AMD Tool open? or will it save the settings?

the strange thing is i can load amd tool and apply settings and it doesnt matter if i close or open it the fanprofile of cc always works. :/ Only have to find a way to "break" it again till it doesnt work. But cold boot , apply amd tool settings, close or leave it open while loading ccc fan speedprofile does the trick for me.

[annihilat0r]

Can you show a picture of the Overdrive menu in CCC?

[painkilla]

Can you show a picture of the Overdrive menu in CCC?

looks like ccc finds my profile not completely valid. The ccc turns normal when i use "use default clocks" in amd tool.

i uploaded my fan profile xml file. maybe you can use it someway.

[annihilat0r]

Still doesn't work for me :/

[erocker]

Me neither! Painkilla, this is with a 4870 with a stock cooler and an unmodified bios correct? Which drivers are you using? That's the only thing I can think of not making this work for the rest of us.

[annihilat0r]

<Feature name="CoreVoltageTarget_0">
<Property name="Want_0" value="1263" />
<Property name="Want_1" value="1263" />
<Property name="Want_2" value="1263" />
</Feature>

Does those really work??

[SNiiPE_DoGG]

just like in bios no voltage adjustors do not work

[painkilla]

i use
- 8.7 beta
- Vista 64 sp1
- stock bios

no modding whatsoever just the ccc profile. I installed amd tool before ccc i belief. I didnt mod voltages or anything in ccc. i only set fanspeed on manual and remove the stock speed part in my profile nothing else.

What else hmm o yeah i took stock cooler off and replaced it with accelero but didnt fid very well so installed stock cooler back.

so you tried my profile?

[erocker]

Hmm.. Perhaps it's a 8.7 beta thing? Unfortunately my system doesn't like the 8.7 beta's. I've never yearned so hard for new ATi drivers to be released.

[Unrealer]

Crysis 1680x1050, Dx9, HIGH, no AA, AFx4:

Default 750/3600 45fps



OC 850/4400 55fps


with "some" artifacts

[painkilla]

artifacts can eventually kill your card or dont go away which is basicly the same as killing the card.

[keninishna]

Is anyone having problems with drivers crashing in games when overclocking the card? I have it completely stable and artifact free in ati tool for 5 mins


like after playing a game for 2 minutes the drivers crash and have to recover or the system reboots. I'm wondering if its an issue with my power supply.

[Unrealer]

Is anyone having problems with drivers crashing in games when overclocking the card? I have it completely stable and artifact free in ati tool for 5 mins

I use 800/1100 and doesnt crash...

PD: are u using stock vcore? 880mhz sounds good

[AriciU]

Is anyone having problems with drivers crashing in games when overclocking the card? I have it completely stable and artifact free in ati tool for 5 mins

like after playing a game for 2 minutes the drivers crash and have to recover or the system reboots. I'm wondering if its an issue with my power supply.

Same here at 790/1100. I play like 20 mins of Crysis, even more sometimes and it just locks up, screen goes blank then some crazy coloured squares appear on the screen -> reboot required. There are no artifacts during gameplay though. I think it might be voltage related as my temps are no problem.

[cantankerous]

I think you guys have your ram too high. Try and set your ram 1050 or less and see if you still get the crashes. If not you may be able to raise your core a bit, say up to 820-840 without issue.

[keninishna]

I use 800/1100 and doesnt crash...

PD: are u using stock vcore? 880mhz sounds good

vcore is 1.47 on load, heh I can only get like 840 stock vcore. I can actually do 900 fine too I was down to 880 cause I want stability but its just not happening except

I'm thinking its my PSU I have a 600 watt ocz gamextreme and the PSU has been acting funny occt reports my 5v line is kinda low like 4.5 v but my multimeter shows it at 4.99 volts. The sata power connectors don't work so I have 5 hds hooked up with molex to sata connectors. 5 hdd + overclocked 4870 + overclocked q6600 + dvd burner + assload of fans in an antec 900 = close to 600 watts. I ordered a corsair hx1000w so I hope that fixes it.

My system reboots almost guaranteed on firefly forest in 3dmark06 even with the ram at 900 mhz. Highest I can go without reboots is like 840/900 which I can do on stock volts. I voltmodded the memory too but I have no idea what the actual volts are to the memory or whats recommended. The pic for the spot for measuring mem voltage on techpowerup shows up on my multimeter at 1.5v which is what it was at stock too I'll experiment with it more when my new PSU comes in.