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7950 Vapor X Voltage Locked? - Page 36

post #351 of 1056
Quote:
Originally Posted by maxs1 View Post

guyz have u encountered some click noise near the sapphire lit logo in vapor-x when .....gpu wakes up from sleep.....
It comes only when gpu wakes up...otherwise no noise when gpu is on or on full load...!

kind of encountered that on my vapor-x 7970 but i'm not sure if the noise is from the gpu or something else, just forget the noise if it works as it should
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Zero Ex 2
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post #352 of 1056
Hi guys

I have been looking to get the sapphire 7950 vapor-x, but after reading through this thread and other, I am starting to doubt the desicion. I am very new to overclocking a gpu, so I will probably be looking to oc the card just slightly, to something like 1100/1450 clock and memory.
Is it possible to reach these clocks without increasing the voltage on the card, since it is voltage locked.? Or would you suggest just staying away from this vapor-x version in general.?
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post #353 of 1056
I can without problems set in CCC 1100/1575 (max sliders values) +20 power limit. There is no option to change voltage in CatalysControlCenter
post #354 of 1056
Xaifodin. I'd say every card goes to 1100MHz gpu somewhat easily. Some need slight voltage increase for that. Memory on the other hand is much more trickier as there are cards out with 2 different memory manufacturers and you cant tell which you get. My card have Elpida ships and it can only do 1325MHz (btw I've not seen anyone posting worse mem oc's)
post #355 of 1056
Thanks for the quick replies

So the best and easiest option is to use the CCC software to get a fairly good results troublefree.? And the boost function will still be on at these oc's?

I noticed the thing about different memory manufacturers (Hynix/Elpida), but I have read somewhere that the memory is specified to run at 1250 Mhz. And I would assume that this is for both the two mem versions, but some can oc better - which is the Hynix chips.?
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post #356 of 1056
Elpida are rated 1500Mhz [This is what most if not all 7970's have]

Hynix are rated 1250 [This is what almost all 7950's have]

Unless Elpida has another one rated at 1250.. which is possible.

But assuming there are only 2 versions, then the Hynix will technically OC "more", like 1500-1600 being the norm, which is +>20% versus reference, while the Elpida might run 1650-1750, or about +>10%, its still, of course, faster.

Also, I'd recommend MSI Afterburner. Its been nice to me.
post #357 of 1056
I've been in talks with sapphire though support ticket system after they released new bios for PN: 299-2E210-201SA revision of the cards. My card is PN: 299-2E210-001SA and it suffers on the same issues. Mainly high vrm temps and gpu clocking down from 950MHz to 850MHz if I wont manually increase power control to +20%. After about week of back and forth messages, doing and sending test, figuring out memory manufacturer, bios version etc. of my card they final send me a new bios.

I had figured out and posted here how to identify your card memory manufacturer without removing cooler and now I got confirmation from sapphire:
015.023.000.001.00000 (113-210P2HY-X01) = hynix memory chips (note the HY in middle set or markings)
015.023.000.001.00000 (113-210P2EL-X01) = elpida memory chips (note the EL in middle set or markings)

Elpida is used on all 7970's as far as I know and is rated at 1500MHz.
For 7950 there are cards with Elpida 1500MHz and 1250MHz rated Elpida or Hynix chips.
My card is on 1250MHz rated Elpida chips and memory cant handle more than 1325MHz OC.

The vbios2 I got for my card is: 015.025.000.099.00000 (113-210P2EL-X08) while the old was 015.023.000.001.00000 (113-210P2EL-X02).
Quick notes:
- With new bios sapphire trixx 4.4.0b MOD cant adjust gpu voltage up or down. Memory voltage adjustment works. Bios is not voltage locked as Afterburner can adjust voltage when forcing constant voltage.
- Power control have been increased and down clocking happens at higher usage than before. (gpu-z readings indicate that at 0% power control card can handle around 20A more VCCD current before starting to down clock)
- Users reporting lower vrm temps might be due to increased fan speed. For my card fans run now 66% @ 70C gpu while with old bios it was 56% fan speed at
same temps. (These are high temps as its tested in closed though well ventilated case running furmark)

Update:
- Default GPU voltage increased from 1,056v to 1,087v.
- Trixx 4.4.0b changes the gpu voltage of the down clocks! (throttle clocks)
example: if I run heaven benchmark and bring the power control down so that the card starts to throttle between 950MHz and 850MHz. The 850MHz clocks use the voltage I set from trixx. example 1,100v. Resulting that the down clocks are 850MHz @ 1,100v and boost clocks 950MHz @ 1,087v. Really odd behavior.
- Memory overclocking not changed or became worse. With quick test even 1325MHz crashed the heaven benchmark immediately.
Update 2:
- Memory voltage increase do not help with overclocking at all, if something it makes it worse.
- I can decrease memory voltage down to 1,350v from default 1,600v and retaining same stability.

I might recall wrong but did some cards get memory voltage decrease to 1,500v with the new bios? I think my card should have got that as well.
Edited by locc - 11/6/12 at 8:03am
post #358 of 1056
Wow. That sucks for anyone who gets Elpida 1250, as its the worst of the worst [I'd imagine]... probably all memory that didnt even hit 1500 stable...

And this is on a Vapor-X???
post #359 of 1056
Quote:
Originally Posted by locc View Post

I might recall wrong but did some cards get memory voltage decrease to 1,500v with the new bios? I think my card should have got that as well.

Yes our cards with upgrade to newest bios v09 and v0A HY get reduced mem voltage from 1.6 to 1.5 - for me it is about 100mhz down from 1850@1.6 to 1750@1.5 in stability
Edited by adamlop - 11/6/12 at 9:28pm
post #360 of 1056
Wow. I unlocked "real" voltage monitoring in MSI Afterburner... this has to be wrong?

If I set 1.137 @ 1200 core as is my norm, both MSI Afterburner and Sapphire Trixx read ~1.010....*

I mean... there's no way in hell a card can run 1200 @ that voltage...

Also, if I try to go over 1200, it seems that regardless of what voltage I set it errors out pretty hard. I still get errors at my current settings, but only once it heats up a lot... beyond what I'd get in games. Seems that it may actually be VRM and GPU temp related though.


*This is under OCCT @ custom resolution 480x480. This prevents throttling. As a test, power consumption went from ~475 @ regular resolutions to ~495w under 480x480 OCCT, so it is working. How it averts the throttling IDK. Also, just for a test, 1100 core @ 1000 VDDC [Reads .910v] only uses about 335w. WOW!

Idle voltages read ~0.015v under what I set it to.
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