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post #14141 of 43921
Quote:
Originally Posted by Forceman View Post

Where did you see that the Hynix are rated higher? All I've ever seen is that they are both 6 GHz.

Someone ought to collect stats, so far it is all anecdotal and I suspect the Hynix/Elpida history colors the conventional wisdom.

If they use the same hynix modules as 7970s then they are rated for higher speeds

So i did a research,

If you have
H5GQ2H24AFR-R0C its the lower binned part that run at 1.5 volts and its rated for 6ghz
H5GQ2H24AFR-R2C is 1.6 volts and 7ghz

Lower binned doesnt mean that cant run at 7ghz

Its the same memory that 7970s used.I had like 20 7970 hynix cards could do 2000 max elpida cards could do 1600 max

Sources:http://www.skhynix.com/products/graphics/view.jsp?info.ramKind=26&info.serialNo=H5GQ2H24AFR
http://www.techpowerup.com/reviews/AMD/HD_7970/5.html

The elpipa part is
elpida w2032bbbg

Now if you take account that elpida ones have tighter timings...
Edited by sugarhell - 1/13/14 at 10:53pm
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post #14142 of 43921
Quote:
Originally Posted by VladimirT View Post

Fan speed ?

2 GT AP-15's in the front at full speed speedfan reports 1790ish RPM, 2 GT AP-15's in the top also at full speed and 1 GT AP-15 as rear exhaust at 7v think that's is something like 780ish RPM out the top of my head.
    
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post #14143 of 43921
Quote:
Originally Posted by Forceman View Post


Again, how do you know that? The memory controller is completely new and there is very little actual data on which memory is overclocking higher, unless you know of a spreadsheet/database I don't.

If the controller is fine then why can't all the cards hit 1500/6000 at default voltage? Unless the theory is that the RAM is being undervolted, in which case all the data kind of goes out the window anyway.

And just to be clear, I'm not saying the memory controller is bad, or weak, just that it may be the limiting factor when it comes to overclocks, especially considering many people can't even get the rated speed out of the memory.

Dude, like many cards we saw by now, including Tri X (all of them) clocked alot higher then ones with Elpida. There is user on Youtbe, which 290, run @1700 on air, now you want to tell me that all of this is just coincidence?

Generally average Elpida oc on memory is around 1400, average on Hynix is 1550....also many Elpida had black screen issue, which kinda point to lower grade products, and less stability.
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post #14144 of 43921
Quote:
Originally Posted by psyside View Post

Guys, i did lots of research, Hynix on 290/290X offer better oc 8/10 times. The Tri X cards, almost all i saw till now around ~10 cards, reached 1600+ on the memory thumb.gif

Elpida on the other hand, most of the times max out at 1450.

Maybe also the impressive cooler on the Tri X and cooling pads on the memory helps? guess so.

BTW did anyone played with Aux voltage? worth it to use? what exactly does it do?

Quote:
Originally Posted by Derpinheimer View Post

I dont think the cooling should help much. Mem heatsinks on my card only get warm (and I actually mean hot, im estimating 60-70c) when running a miner. Games they are still cool to the touch. I mean I've attempted to OC my dud Elpida from a cold start and it doesnt help, so I doubt its a temp limit.

And I do think I found higher Aux to help maintain stability with memory OC slightly, but that might be placebo.. I dont use it anymore.


p.s. is it confirmed Tri-X are hynix only? That would be the first card to ever be hynix only, 79XX or R9 290(x)... I think even the Lightning 79XX came with Elpida and Hynix?

Just checked my tri-x, their Hynix, they easily reach 1500, 1600+ has been an bit of an struggle. I've only been using sapphire trixx which only has offset controls for core, no aux controls like afterburner.

I got around to making a nifty little chart for those interested in my findings for the TRI-X OC, I would love to get comparisons from other owners. Mostly concerned if these are normal VRM1 temps, thats the only thing worrying me. Runs great in AC4, gonna do some more testing for actual game performance.

About BF4, apparently Newegg is no longer offering it to all 290X as it was suppose to be. I'm gonna contact AMD and see if I can snag another code tongue.gif


The chart:

NIkcc14.png
Edited by Paulenski - 1/13/14 at 11:28pm
post #14145 of 43921
Quote:
Originally Posted by psyside View Post

Dude, like many cards we saw by now, including Tri X (all of them) clocked alot higher then ones with Elpida. There is user on Youtbe, which 290, run @1700 on air, now you want to tell me that all of this is just coincidence?

Generally average Elpida oc on memory is around 1400, average on Hynix is 1550....also many Elpida had black screen issue, which kinda point to lower grade products, and less stability.

My point is that 1400 is below the rated speed of the Elpida chips, so what's your reasoning for why they can't even do stock speeds? Either they are undervolted or something else is holding them back. Likewise the average Hynix overclock on the 7970 seemed to be quite a bit higher than what we've seen with the 290s. So again, unless the chips are different or undervolted, there is something else that is affecting the overclock - which is why I think the memory controller is the hold up. I'm not saying that Hynix chips aren't binned better, they may well be, but neither of them is clocking as high as they used to with the Tahiti cards.

Neither the Hynix nor the Elpida chips (which according to the part numbers sugarhell posted are both rated the same [1.6/6GHz and 1.6/7GHz]) are clocking as high as they have historically. Which implies that which memory is on the card has less to do with the max memory overclock than it has historically. Anecdotal Youtube data notwithstanding. Has anyone made a Hawaii overclocking thread yet? That'd be a good place to collect this kind of data.
Edited by Forceman - 1/13/14 at 11:30pm
post #14146 of 43921
Quote:
Originally Posted by Forceman View Post

My point is that 1400 is below the rated speed of the Elpida chips, so what's your reasoning for why they can't even do stock speeds? Either they are undervolted or something else is holding them back. Likewise the average Hynix overclock on the 7970 seemed to be quite a bit higher than what we've seen with the 290s. So again, unless the chips are different or undervolted, there is something else that is affecting the overclock - which is why I think the memory controller is the hold up. I'm not saying that Hynix chips aren't binned better, they may well be, but neither of them is clocking as high as they used to with the Tahiti cards.

With more volts actually hynix cards could hit 1800-1900. But we are limited at 1.5 volts
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post #14147 of 43921
R9 290X Tri X OC




R9 290 Tri X



Same chips on both 290/290X thumb.gif
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post #14148 of 43921
refer to my post about hynix vs elpida.

R0C version is the lower binned version of hynix for 1.5 volts. It should be able to reach 1700 kinda easily
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post #14149 of 43921
Quote:
Originally Posted by Paulenski View Post


The chart:

NIkcc14.png

Thanks alot for this. I would suggest to not use over 1.3v-1.35 as absolute max on air, if you do max out your fans, i would go for 1.3v, i dont think scaling with volts is really great after 1.3v...you already run like 120mV + if i'm not mistaken.
Quote:
Originally Posted by sugarhell View Post

refer to my post about hynix vs elpida.

R0C version is the lower binned version of hynix for 1.5 volts. It should be able to reach 1700 kinda easily

Thanks. What is the stock volts on this cards for the memory?
Edited by psyside - 1/13/14 at 11:38pm
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post #14150 of 43921
Quote:
Originally Posted by psyside View Post

Thanks alot for this. I would suggest to not use over 1.3v-1.35 as absolute max on air, if you do max out your fans, i would go for 1.3v, i dont think scaling with volts is really great after 1.3v...you already run like 120mV + if i'm not mistaken.
\

I didn't think I could go anymore on the voltage, unless something is wrong with the thermal pads I can't do much else with those VRM1 temps.
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