[Official] 7870 Tahiti LE (XT) Owners Club - Page 2 - Overclock.net - An Overclocking Community

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[Official] 7870 Tahiti LE (XT) Owners Club

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post #11 of 5260 (permalink) Old 03-21-2013, 04:34 PM - Thread Starter
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There's a tiny performance boost for Far Cry 3 but BF3 will perform the same.


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post #12 of 5260 (permalink) Old 03-21-2013, 05:43 PM
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You can count me in biggrin.gif


ASUS Maximus IV GENE-Z Owners Club
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post #13 of 5260 (permalink) Old 03-21-2013, 06:56 PM - Thread Starter
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Quote:
Originally Posted by Odracir View Post

You can count me in biggrin.gif

Wow is that overclock stable? Did you adjust the voltage with Afterburner or is it all on stock?


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post #14 of 5260 (permalink) Old 03-22-2013, 01:16 AM
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Okay, I have the Powercolor Myst. I guess this would be a good thread to ask a bunch for questions I got about this card.

Bought it this Monday, .32 BIOS. Catalyst 13 Beta drivers.

1) Why did you RMA your card?
2) Whats the latest BIOS version?
3) Anyone know the exact differences between Powercolor Myst and Powercolor EZ Edition? I know that the Myst is newer, and has copper heatpipes and a slightly different shroud, and is much heavier. I'm guessing being newer also has a later BIOS revision.

Got a few more I'll keep posting in a bit.

Edit:

4) Does anyone else get random spikes to 100% load (for a brief moment) on your desktop? This happens constantly. Why does this happen?
5) For your overclocks, in games and benching, does core clock spike between 975 and your OC setting? If it is, then your OC is not performing properly; there probably isn't enough power or core voltage sent to the GPU. However, if you don't have your power limits high enough, you WON'T see artifacts. At 1175 with everything else stock, I get no artifacts. However, when I turn power to +20%, 1175 instant artifacts like crazy, 1150 artifacts bad as well. My framerate also went up noticeably, suggesting that just because you have a high clock with no artifacts doesn't mean its performing. AMD's power settings will try to force the card to conform to certain power requirements, it seems.


Edit #2: Validation

http://www.techpowerup.com/gpuz/euk33/

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post #15 of 5260 (permalink) Old 03-22-2013, 03:10 AM
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Glad this thread was started and proud to be the only Powercolor owner thus far. My second card arrived yesterday and I will try crossfiring them this weekend. I'll let everyone know how it works out.smile.gif

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post #16 of 5260 (permalink) Old 03-22-2013, 03:13 AM
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Powercolor EZ edition is an inferior version of the Myst. The pixel fillrate is much lower, as is the texel fillrate is lower as well. I know because I bought this card. It does not overclock well at all, but it still performs like a stock 7870 tahiti with a stock score of 8000 on 3dmark11 performance. I'm keeping the EZ as a spare but it definitely is inferior to the Myst. Hope this helps.

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post #17 of 5260 (permalink) Old 03-22-2013, 04:38 AM
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Hmph the card specs are almost identical to the GTX 680

Same core count, same memory bus, same memory, same memory speed, same ROP's. Bios flash anyone?

Too much money?
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post #18 of 5260 (permalink) Old 03-22-2013, 05:02 AM
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Jimbo,

What pixel and texel fill rates do you have on your EZ and MYST? I recently bought an EZ thinking as I have a 660ti that I could return and I thought I could basically get the same performance for $50 less and 2 free games.

Also, my temps are pretty high. I am at 80°C easily and I have to set CCC power at +20% just to stop the core from dropping to 500mhz during gameplay. Can you give some more details on your experience with the MYST as far as temps, noise, fan speed etc.? I am trying to decide if I am going to return 7870 EZ and keep the GTX 660ti. Thanks!

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post #19 of 5260 (permalink) Old 03-22-2013, 05:29 AM
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Quote:
Originally Posted by Battman23 View Post

Jimbo,

What pixel and texel fill rates do you have on your EZ and MYST? I recently bought an EZ thinking as I have a 660ti that I could return and I thought I could basically get the same performance for $50 less and 2 free games.

Also, my temps are pretty high. I am at 80°C easily and I have to set CCC power at +20% just to stop the core from dropping to 500mhz during gameplay. Can you give some more details on your experience with the MYST as far as temps, noise, fan speed etc.? I am trying to decide if I am going to return 7870 EZ and keep the GTX 660ti. Thanks!

I'd be careful with the 7870s Tahitis, there seems to be a slew of issues. I have the .32 BIOS, which AFAIK is the newest one? Yet I'm still plagued with strange issues of core clock fluctuations. This is NOT a properly functioning product.

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post #20 of 5260 (permalink) Old 03-22-2013, 07:25 AM
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I've used both the 030 bios and 032. My card came with the 030 bios. My experience of both as follows:

032 bios
Installing this bios and setting the power limit to +20, the card would throttle. Only around 60% gpu usage

030 bios
Power limit set to +20, the card did not throttle and would always perform at 90-100%.

Power limit set to 0% on both these bios', the card did not throttle, always performed at 90-100%

If you're still experience throttling I recommend setting Unofficial overclocking mode to without Powerplay support in Afterburner.

My Afterburner config may be of use to you, I have attached it. Replace the CFG in the Afterburner root directory.

I recommend MSI Afterburner 3.0.0 Beta 7 as it supports voltage control for tahiti cards.

http://www.guru3d.com/files_details/msi_afterburner_beta_download.html

MSIAfterburner.zip 1k .zip file
030 bios.zip 105k .zip file

For a stable 1200/1500 overclock, I need to set my voltage to 1.231V

I also recommend using Afterburners 3D/2D profile management, as pictured below.

VtFgvNn.png
Attached Files
File Type: zip MSIAfterburner.zip (1.1 KB, 49 views)
File Type: zip 030 bios.zip (105.0 KB, 75 views)

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