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Sapphire 7970 overclocking woes

post #1 of 8
Thread Starter 
I got the sapphire 7970 dual-x(not the o'ced version) with the reference brown PCB.It has 925/1375 core & memory clocks.Also it has a little bios switch with letters 1 and 2 marked on either side.My product SKU is 11197-06-40G.I tried over clocking my card but it only goes up to 1050/1500 on stock volts which is 1175 mv as shown in trixx.I tried pushing the card to 1125/1575 at 1200 mv,but the games and benchmarks crashes after some time.I m feeling very dissapointed as I read that the 7970 with reference brown PCB is a good overclocker.Switching the bios to 2 doesn't change my clocks or its over clocking capability.Can sm1 gimme the link to the bios of sapphire 7970 dual x-oc version SKU 11197-01-40G and also can I flash my bios to that model's bios and expect better overclocks?BTW my ASIC quality is 65% which is guess is low,but the card not able to do 1125/1575 is very dissapointing.



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post #2 of 8
overclocking depends on the chip quality you get. its the silicon lottery. did you try higher voltage. you can go upto 1.3v.
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post #3 of 8
Here's a link to all the Sapphire cards that have been released:

TPU VGA BIOS repository
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post #4 of 8
In order from top to bottom (based on the link I gave above):

1. Vapor-X 7970 GHz Edition
2. VAPOR-X
3. Toxic
4. Toxic, GHz Edition, 2nd bios start at 1200/1600/
5. BIOS update by AMD to flash reference design HD 7970 to GHz Edition
6. SAHD797-3GD5OC001/11197-01-40G (VD4530)
7. HD 7970 OC
8. HD 7970 DUAL X
9. HD7970 3G GDDR PCI-E
10. Sapphire HD 7970 3072

The last one is the same BIOS as:

ATI HD 7970, Club3D HD 7970, Diamond HD 7970, Gigabyte HD 7970, HIS HD 7970, MSI HD 7970, Powercolor HD 7970, VTX3D HD 7970, Yeston HD 7970
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post #5 of 8
Thread Starter 
Quote:
Originally Posted by raghu78 View Post

overclocking depends on the chip quality you get. its the silicon lottery. did you try higher voltage. you can go upto 1.3v.

There is a massive vdroop on this card,around 0.05v.Setting the voltage to 1.3v shows 1.24-1.25 v volts in gpu-z,the benchmarks run stable for half the time,then starts artifacting and crashes.I tried running the card at 1125/1575 clocks at 1.2v(1.15 effective),3d mark 11,vantage,heaven and even 15 mins of furmark test all ran smoothly without artifacting giving good scores,but guild wars 2 crashed after 15 mins,even though the core and vrm temps remained below 60°C.That seemed strange to me.Why is this happening?


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post #6 of 8
it looks like you got a really poor overclocker. tough luck. try some other BIOS and see if it improves your overclocks.
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post #7 of 8
Thread Starter 
Quote:
Originally Posted by raghu78 View Post

it looks like you got a really poor overclocker. tough luck. try some other BIOS and see if it improves your overclocks.

Why is it that the benchmarks don't crash but the game which doesn't stress the GPU as much crashes?confused.gif

Also the temperatures below 60 are decent I guess.Is vdroop a common phenomenon in 7970 cards?Will flashing a diff bios change my luck?Also if I plan to sell off my 7970 and get another one,which one should I go for?I need dual link dvi.

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post #8 of 8
are you running the 13.2 beta 5 drivers ? test guild wars 2 at stock speeds. if your card runs stable in guild wars 2 at stock settings but crashes with OC then its mostly an unstable overclock. as for another HD 7970 i recommend going with a Sapphire HD 7950 boost. unlocked voltage. stock voltage of 1.25v. easily overclocks to 1100 - 1150 mhz. very good user reviews

http://www.newegg.com/Product/Product.aspx?Item=N82E16814202006

if you definitely want a HD 7970 card go for either the Sapphire HD 7970 Ghz vapor-x or HIS HD 7970 iceq x2 ghz edition

http://www.superbiiz.com/detail.php?p=AT-7970GHZ

http://www.newegg.com/Product/Product.aspx?Item=N82E16814161431

the sapphire card has a custom PCB design with dual 8 pin power and a good vapor-x cooler. 28.5 cm long. the cooler gets a bit loud after 50% fan speed. the his card has a reference HD 7970 PCB design with dual 8 pin power and a good iceq cooler. more power phases than reference HD 7970 allows for better stability and lower temps wit extreme voltage overclocking. card measures 31.1 cm long. so check if it will fit in your case

HIS card reviews
http://www.legionhardware.com/articles_pages/his_7970_iceq_xsup2_ghz_edition_7950_iceq_xsup2_boost_clock,2.html
http://www.hardwarecanucks.com/forum/hardware-canucks-reviews/59265-his-hd-7970-iceq-x-hd-7950-iceq-x-review-13.html
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