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[Official] 7870 Tahiti LE (XT) Owners Club - Page 16

post #151 of 5223
So far from what I've read in this thread as well as my experience (however limited) with ATI cards .. They don't like memory OC .. Try dropping the memory down to stock and pushing the core clock a little.. On my MSI 7850 TF I had to bump the voltage at a certain point, it seemed like once the OC got high enough on the core it started starving for power and gimped itself...

Let us know how it turns out ..

----

On another note .. I ordered my Sapphire XT from superbiiz.com (groan) they showed it in stock and then emailed me after I paid to notify that their site is a liar and they wont have it for another 10-20 days AAARRRRGGG

Anyone know anywhere that has the XT in stock for under $250 right now? I've been looking everywhere but can't find anyone .. Called TD and Newegg and they both said 1st or 2nd week of April as well.

Throwing together another gaming rig and this is the last piece I need .. No extra card to throw in there now to hold me over either.
post #152 of 5223
Quote:
Originally Posted by ztkraptor View Post

So, hello all.
I'm new here, but not new to overclocking.

So I have myself 2 of the Myst Powercolor Cards running in Crossfire.

I'm running at 20% voltage thing, and im at 1185/1600
Normally in Heaven 4.0 I get like 66 average FPS i think.

Well, I pushed the memory up a bit more, and now its only getting around 20fps in it.

I reset the card to default, and tried again, same result bad FPS now in Heaven...how could or what could have caused this? Seems odd to me

However, I'm getting the same FPS that I normally got in BF3 and any other games it seems.
So, what could have caused this?
Should I uninstall the drivers and re-install?
Doesn't seem to make sense.
What would cause this sudden terrible fps in Heaven 4.0?

I know this isn't the same but I just ran a few game benchmarks and noticed my fps is slightly higher when Memory is at 1500 stock than when at 1600 OC. It is a ~5% difference.
    
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post #153 of 5223
Quote:
Originally Posted by StampedTees View Post

On another note .. I ordered my Sapphire XT from superbiiz.com (groan) they showed it in stock and then emailed me after I paid to notify that their site is a liar and they wont have it for another 10-20 days AAARRRRGGG

Anyone know anywhere that has the XT in stock for under $250 right now? I've been looking everywhere but can't find anyone .. Called TD and Newegg and they both said 1st or 2nd week of April as well.

Throwing together another gaming rig and this is the last piece I need .. No extra card to throw in there now to hold me over either.

Newegg had them for $235 with rebate card and Ebay was about the same. But today when I looked, they were all sold. I am afraid the word is getting out. I got one of the last Myst cards this week from Newegg at $208, with a hidden rebate. Now they are all sold out. It's a shame, cause I was going the share the promo code with members but it expires on the 31st.

EDIT: There is a Myst on Ebay for $240 if you are interested: http://www.ebay.com/itm/PowerColor-PCS-AX7870-2GBD5-2DHPPV3E-Radeon-HD-7870-MYST-Edition-2GB-Video-Card-/380607434750#vi-content
Edited by Bluesman - 3/28/13 at 4:21pm
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post #154 of 5223
Quote:
Originally Posted by ahmedmo1 View Post

I know this isn't the same but I just ran a few game benchmarks and noticed my fps is slightly higher when Memory is at 1500 stock than when at 1600 OC. It is a ~5% difference.

Well the issue that I don't understand, is that why now even at stock speeds does Heaven 4.0 not work properly?
Other games seem to be working fine. Just why all of the sudden?
post #155 of 5223
Quote:
Originally Posted by goldbranch View Post

Guys, what's the max temp for these 7870 Tahiti LE cards? I notice once it reached 90C / 80% fan speed, the coil whine started to kick in pretty loudly.mad.gif
95C and it will shut itself off. Your card should not be getting that hot. Take it from me, mine was hitting 85C @ 100% fan. I ended up changing my fan configuration around and pulling in from the back and front while exhausting out one side. If changing fan's doesn't help, re-evaluate the space in your case or re-apply the thermal compound. But if you're going to do that, just try a new card and RMA it.
post #156 of 5223
Yeesh, those are high temperatures. I would much rather have a 7870 GHz edition than a Tahiti at those temps.
    
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post #157 of 5223
Quote:
Originally Posted by ahmedmo1 View Post

Yeesh, those are high temperatures. I would much rather have a 7870 GHz edition than a Tahiti at those temps.
They dont normally get that hot. At 1.3v full load my card tops out at 79C
post #158 of 5223
Did a bit of OC'ing
post #159 of 5223
Quote:
Originally Posted by 8800GT View Post

95C and it will shut itself off. Your card should not be getting that hot. Take it from me, mine was hitting 85C @ 100% fan. I ended up changing my fan configuration around and pulling in from the back and front while exhausting out one side. If changing fan's doesn't help, re-evaluate the space in your case or re-apply the thermal compound. But if you're going to do that, just try a new card and RMA it.

The whine coil only kicks in at over 80C/80% fan speed. I already contacted Newegg for RMA but they need a confirmation from Powercolor that the cards are defective, otherwise I'll get charged with restocking fee. I had two reference EVGA GTX 670 FTW sandwiched before and the temps never got above 75C while gaming. May think of switching back to the green side again. mad.gif
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post #160 of 5223
kinda random... does any program work with voltage tweaking? I tried afterburner so far and it doesn't do anything. Trying to lower the voltage to lower the heat but changing the voltage in afterburner seems to do nothing.
Edited by hesho - 3/28/13 at 8:30pm
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