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[Official] 7870 Tahiti LE (XT) Owners Club - Page 36

post #351 of 5228
unless you "already" have everything except the blocks.
post #352 of 5228
Quote:
Originally Posted by tp4tissue View Post

LOL well obviously you wouldn't go water on 2 7870s because that would completely kill the performance per dollar..

2 of these $56.95 plus shipping maybe $120?
Start cost of cards is $420 sell the games ($30 a piece) so take away $120.
So the cost of cards it about $300+ universal blocks which will put you back up to $420 lol.

Now if you don't have a cooling loop that's where it gets expensive, but once you invest it's cheap to update, not to mention that the blocks you're buying for the 7870s are universal so the only thing you may need later for a newer card is an adapter plate.
Quote:
Originally Posted by tp4tissue View Post

unless you "already" have everything except the blocks.

You updated as I posted tongue.gif .. Yes I'm that slow.

Also if you want to do it on the cheap do the Antec 620s mod, the bracket is about $8 each and have fan mounts. Used to call it Dwood's mod but it's TripT CC now. linky
Edited by MikeMike86 - 4/2/13 at 1:37pm
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post #353 of 5228
Quote:
Also if you want to do it on the cheap do the Antec 620s mod, the bracket is about $8 each and have fan mounts. Used to call it Dwood's mod but it's TripT CC now. linky

I like this setup for air cooling, http://www.newegg.com/Product/Product.aspx?Item=N82E16835192026 the RAM and VRMs. You can add up to 120mm fans or use the ones provided. I will use the 80 mm provided unless they don't provide enough cooling. I suspect that with my waterblock,http://www.performance-pcs.com/catalog/index.php?main_page=product_info&products_id=36951 , the PCB will be sufficiently cool to support a low fan speed. One reason I am going highend on the waterblock is that the Tahiti is a real firebeast spawed in the depths of hell.
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post #354 of 5228
Tiger Direct has the Sapphire 7870 XT back in stock, canceled with superbiiz and ordered from TD. Will be here Thursday, I'll let ya know how it goes !

http://www.tigerdirect.com/applications/SearchTools/item-details.asp?EdpNo=7670961
post #355 of 5228
Quote:
Originally Posted by Bluesman View Post

I like this setup for air cooling, http://www.newegg.com/Product/Product.aspx?Item=N82E16835192026 the RAM and VRMs. You can add up to 120mm fans or use the ones provided. I will use the 80 mm provided unless they don't provide enough cooling. I suspect that with my waterblock,http://www.performance-pcs.com/catalog/index.php?main_page=product_info&products_id=36951 , the PCB will be sufficiently cool to support a low fan speed. One reason I am going highend on the waterblock is that the Tahiti is a real firebeast spawed in the depths of hell.



That GPU block is extremely expensive for just one time use.

I would go with a Swiftech MCW82 that has many adapters, you could probably get more life out of it.


I have a MCW80 that I was thinking about putting on the Myst but I'm undecided if the Myst card has stability problems.


This block looks like a great choice if it would fit the Myst.

http://www.performance-pcs.com/catalog/index.php?main_page=product_info&cPath=59_971_240_582&products_id=24645
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post #356 of 5228
Quote:
Originally Posted by Bluesman View Post

I just got 1840 yesterday at 1210/1620, so 2100 with crossfire is a reasonable target.

I don't understand, I'm not able to break 1680 with crossfire, and I'm only getting 850ish on a single card at 1180/1500(I just wanted to keep memory down I can get mem to around 1600)
My temps don't pass 65C So what is going on with my cards then?

What settings are you using to get 1840 ??


Hmm wait, are you guys using Heaven 4.0??
Edited by ztkraptor - 4/2/13 at 2:27pm
post #357 of 5228
It seems like my max OC is around 1150 (haven't messed with the memory). At 1170 I start getting artifacts. Forcing constant voltage and increasing the voltage doesn't seem to help. I tried running the fan at 100%, this kept the card at least below 70C (don't remember the exact number), but that didn't seem to make a difference either.

Is there anything else I should be doing or is that just the limit of my card? I am fine with it if it is, because it is only a few % below what other people seem to be doing, but I would hate to leave performance on the table just because I don't know what I am doing.

If it matters, I am using the latest beta of Afterburner to OC the GPU and my bios is version 28. Also using the latest beta drivers from AMD's website. AB and the drivers were downloaded on Friday.

BTW, AB keeps switching to the 50% fan setting when I turn on the computer. Is there a way to get it to automatically turn on the custom fan profile?
Edited by aviphysics - 4/2/13 at 2:49pm
post #358 of 5228


Is 72% good for ASIC quality on these cards?
post #359 of 5228
Thread Starter 
Quote:
Originally Posted by markallen1988 View Post



Is 72% good for ASIC quality on these cards?

Yea mine is 73%

    
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post #360 of 5228
Quote:
Originally Posted by aviphysics View Post

Warning: Spoiler! (Click to show)
It seems like my max OC is around 1150 (haven't messed with the memory). At 1170 I start getting artifacts. Forcing constant voltage and increasing the voltage doesn't seem to help. I tried running the fan at 100%, this kept the card at least below 70C (don't remember the exact number), but that didn't seem to make a difference either.

Is there anything else I should be doing or is that just the limit of my card? I am fine with it if it is, because it is only a few % below what other people seem to be doing, but I would hate to leave performance on the table just because I don't know what I am doing.

If it matters, I am using the latest beta of Afterburner to OC the GPU and my bios is version 28. Also using the latest beta drivers from AMD's website. AB and the drivers were downloaded on Friday.

BTW, AB keeps switching to the 50% fan setting when I turn on the computer. Is there a way to get it to automatically turn on the custom fan profile?

Every card is different some people will get higher clocks some people will get lower, it's just the luck of the draw for overclocking. For the fan profile it should automatically stay on what you set it to, maybe try selecting the "apply overclocking at system startup". Make sure it's set to startup with windows as well.
Quote:
Originally Posted by ztkraptor View Post

Warning: Spoiler! (Click to show)
I don't understand, I'm not able to break 1680 with crossfire, and I'm only getting 850ish on a single card at 1180/1500(I just wanted to keep memory down I can get mem to around 1600)
My temps don't pass 65C So what is going on with my cards then?

What settings are you using to get 1840 ??


Hmm wait, are you guys using Heaven 4.0??

Re-read what he wrote. biggrin.gif

Edit: Ok here's what I came up with on my ULPS and Powerplay comparison one big picture is easier than typing it out. In the process I learned that changing the voltage actual does make the card more stabled when overclocking. I ran it stock and with an 1150mhz overclock, didn't mess with the memory. Warning: Picture! (Click to show)
photo ULPSandPowerplaycompare_zps2a9e6142.png

It's a huge increase while overclocked with ULPS and Powerplay disabled, all this benchmarking has now made my room about 10degrees warmer lol.
Edited by MikeMike86 - 4/2/13 at 4:51pm
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