[H] users 7970 Overclock Results thread

1200mhz core clock
1575 mhz Ram.
I really need to step that ram speed up since its just at overdrive max. But I havent had any need to in any video game thus far.
 
2 X MSI HD 7970. (Ref Cooler)

ASIC 60% and 61%

1125 Core
1575 Memory

Stock volts (1.175)

Overclock Tool:
MSI Afterburner/CCC

Stable in 3DMark Vantage and 165Hours of BF3 :D. Max temp around 71-72 in BF3
 
XFX reference
stock 1.174 V
1125/1800 ( no ECC kicking in)
1150 brings artifacts and voltage doesn't help
GPU 70c/ VRM 68c
 
gigabyte 7970 with ek-block
1300/1850 @ 1.225 ( reading about 1.16~1.17 in gpu-z on load )
 
How are you getting the core above 1200Mhz with afterburner? I'm using the new beta and it physically won't let me increase the clock past this point. The slider hits the end at 1200.
 
Guys what safe voltage bump? My card default is 1050, I'm running it at 1150/1800 on all 3 cards in tri fire
 
Marcdaddy said:
Guys what safe voltage bump? My card default is 1050, I'm running it at 1150/1800 on all 3 cards in tri fire
Click to expand...

You should be fine up to the max, however, power draw and heat goes up a TON when you increase it. So you'll have to use manual fan at a high speed, easily 50% or higher (which is loud)

I'd strongly suggest dousing them under water or adding an accelero to offset the higher temps with voltage :p Personally, I always ran my 7970s at the highest oc on stock volts to avoid the additional heat. (I got up to 1150 at stock voltage)
 
I'm happy where it's at, getting 19250 in 3dmark11, 54250 in Vantage, Heaven Benchmark 5350
 
PeeWeePee said:
thanks man
its going 1300/1900 now :D
Click to expand...

ASUS bios: 1.4v vddc / 1.75v mvddc on water, your temps would still be reasonable. No worries - APS & OCP will keep you from damaging your card, just keep monitoring your temps in GPU-z. Then 1400/2000 is possible :eek: DO IT! (oh yeah and post a screenshot showing your asic qual too! )

edit: heres the pic again
gput.jpg
 
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jaredpace said:
ASUS bios: 1.4v vddc / 1.75v mvddc on water, your temps would still be reasonable. No worries - APS & OCP will keep you from damaging your card, just keep monitoring your temps in GPU-z. Then 1400/2000 is possible :eek: DO IT! (oh yeah and post a screenshot showing your asic qual too! )
]
Click to expand...


i'll try that later i guess
here's pic
7970oc.png
 
Holy Moly that is a beast overclock. Golden sample card for sure if the asic does 1.4g. 8 GHZ memory! [H]ard for sure! Damn mang, maybe 2100? :p

Also droop on vddc 1250mv -> 1180mv. 1400mv -> ~1310mv? edit: i think if you use gputweak to set core, you'd then have to bump up the memory with afterburner, unless you made your own clock tables
 
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A Little help :)

I consider my self a relatively adept overclocker but my Sapphire 7970 Dual-X (not the OC version) card has me baffled.

It runs 950/1425@1,175V stock.

I got it to 1150/1600 @ stock voltage hitting 75 degrees with 100% GPU after a 10 min burn.
Method: 25Mhz increase on core clock, 2 min burn, no artifact...repeat, same with memory.

I got it to 1200/1600 @ 1,2V (0,025 increase) voltage hitting 78 degrees with 100% GPU after a 10 min burn.
Method: 25Mhz clock increase, 0,08V increase steps, 2min burn.

I decided it was not worth it and reduced to 1150/1600 @ stock voltage after about 30 min's of OC'ing

Then I did some watt measurement and found out that ANY increase in memory clock would result in +70W usage when the card was idling in 2D mode and that kinda ticked me off since the memory increase only gave FPS 3-5% increase.

My end clock was a simple 1150/1425 @ std voltage which gave me a 18% FPS increase.
I used TriXX for OC.


I used this in games for about 4-6 hours then a PC reboot and suddenly all games crashed on startup, after reducing core clock to 1100 they worked fine again.

Now I have artifacts even @ stock clock in all games.

Any ideas on what i did wrong?

Thanks :)

*edit*
Woups, sorry for the minor necro :-/ didn't see that it was a month since last post
 
JohnnyGoofy said:
A Little help :)

I consider my self a relatively adept overclocker but my Sapphire 7970 Dual-X (not the OC version) card has me baffled.

It runs 950/1425@1,175V stock.

I got it to 1150/1600 @ stock voltage hitting 75 degrees with 100% GPU after a 10 min burn.
Method: 25Mhz increase on core clock, 2 min burn, no artifact...repeat, same with memory.

I got it to 1200/1600 @ 1,2V (0,025 increase) voltage hitting 78 degrees with 100% GPU after a 10 min burn.
Method: 25Mhz clock increase, 0,08V increase steps, 2min burn.

I decided it was not worth it and reduced to 1150/1600 @ stock voltage after about 30 min's of OC'ing

Then I did some watt measurement and found out that ANY increase in memory clock would result in +70W usage when the card was idling in 2D mode and that kinda ticked me off since the memory increase only gave FPS 3-5% increase.

My end clock was a simple 1150/1425 @ std voltage which gave me a 18% FPS increase.
I used TriXX for OC.


I used this in games for about 4-6 hours then a PC reboot and suddenly all games crashed on startup, after reducing core clock to 1100 they worked fine again.

Now I have artifacts even @ stock clock in all games.

Any ideas on what i did wrong?

Thanks :)

*edit*
Woups, sorry for the minor necro :-/ didn't see that it was a month since last post
Click to expand...



That's quite a jump in power usage just from memory o/cing -- not sure if that should happen. Your card probably jumped into a higher power-state due to the o/c though. I'd reset all o/c to default via Trixx / CCC and uninstall/reinstall drivers and see if the artifacts persist @ stock.
 
My first 7970 (I had to RMA it, MSI Reference) did 1225/1800 at 1.29v on the core, and stock memory volts

My RMA replacement is doing 1250/1890 at 1.26v core, 1.7v memory

I find it interesting that by trying to up the GPU to anything higher than 1250, regardless of voltage, I start getting the white dots inside textures. this is on water, temps never higher than 41'C during gaming

I had the memory running at 1900Mhz at 1.7v but after 2 hours of looping Unigine, it crashed my system, 1890 is stable though

ASIC is 73.8%
 
Reality said:
I find it interesting that by trying to up the GPU to anything higher than 1250, regardless of voltage, I start getting the white dots inside textures. this is on water, temps never higher than 41'C during gaming
Click to expand...

You find that interesting?
That's perhaps the most common thing in all of overclocking!
Sometimes you just don't get a card that clocks high regardless.
 
That's_Corporate said:
You find that interesting?
That's perhaps the most common thing in all of overclocking!
Sometimes you just don't get a card that clocks high regardless.
Click to expand...

damn bro, can't you just let me rationalize in my mind that my card is broken!? ;)

and 1250 is high-ish... i guess?
 
jaredpace said:
Holy Moly that is a beast overclock. Golden sample card for sure if the asic does 1.4g. 8 GHZ memory! [H]ard for sure! Damn mang, maybe 2100? :p

Also droop on vddc 1250mv -> 1180mv. 1400mv -> ~1310mv? edit: i think if you use gputweak to set core, you'd then have to bump up the memory with afterburner, unless you made your own clock tables
Click to expand...

Most people find once 1600-1700mhz is breached you loose frames, vmem regardless. Setting that speed is nothing, getting more speed out of it when under use is another.

My updated results after a few months of clocking and general use:

ASIC 73.6% Best stock volts/cooling cry2/etc stable OC: 1220/1530

So far at 1.3ghz 1290mV (set) with vdroop minimizing flash. Actual voltage after droop is 1250mV during one peak but usually around 1210-1220mV. Seems flashing does improve this a little as it used to be about 100mV out all times (or reports better..). Once boosting voltage more, had instability when card goes from idle to moderate/maximum load. As can and has happened with many OC applications where power saving is involved. Mostly froze with browser flash usage (due to peaky, intermittant core speed jumps when scrolling etc), enabled constant voltage and this went away.

Fan noise is high but bearable under load. Temps never exceeding mid 70s C (usually 60s). Now this has me wondering, what on earth can it do on an accelero/h2o!
 
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I'm getting a 7970 tomorrow but I think it's one of the voltage locked ones. Do any of you guys know if I'll be able to get a little bit more voltage than stock if I use Power Tune in CCC?
 
I haven't been following the 7000 series cards, how do you know if they're voltaged locked?
 
MasonD said:
I haven't been following the 7000 series cards, how do you know if they're voltaged locked?
Click to expand...

Pretty hard to tell actually. They don't advertise it. However, I know that some new Gigabyte WF, Sapphires, Asus DCIIs, etc, etc are locked.

I think it's because they are pushing the GHz cards and what's the point in the GHz cards if you can turn a non-GHz into a GHz with 5 minutes in Afterburner?
 
yeah, but the ghz cards have boost which is disabled as soon as you change the clocks, so there is still some value there.
 
The Mac said:
yeah, but the ghz cards have boost which is disabled as soon as you change the clocks, so there is still some value there.
Click to expand...

Really? WTF are AMD thinking! They have a stone cold killer of a GPU on their hands with the 7970 but they are making changes which are gimping the card. They should have just left well alone.
 
it makes sense really.

If you are gonna max out your OC, what do you really need boost for? its not like it can OC any further...

the only downside is that you loose the vddc bump you get when boost is active, so you have to fiddle with it yourself...
 
Results
1025 Core
1575 RAM
1.17 volts
Added 5% Power Limit

Type Card
XFX DD -- Voltage LOCKED

Overclock Tool
AMD CCC Overdrive

Stability Test
Furmark Burn-In
 
I get 1200 core/1600 ram at 1.17 volts with 20% power tune. For some reason anything above 1.180-85v my cards heats up like crazy.
 
Asus 7970 Matrix Platinum 3gb

I can get it to run at 1300mhz stable for certain games at 1.30v with /1650mhz usually is at 1250mhz with 1.25v.
 
Ol8cfvZ.jpg


#1 is a champion, 1200 core at 1.1v with huge headroom still to go
#2 is a dud, can't persuade it past 1170 at 1.3v (may need further refinement)
#3 is a normal, somewhere around 1200 limit (needs refinement)

This is on air on reference cooler though.
 
1300core/1600mem, power 20% @ 1.25v The only game I ran that for was Crysis 3 and some benchmarks tests. Most games I play don't even mark the card sweat.
 
2 x Asus 7970 DCII cards, the older one clocked 1205@1,250V mem 1550 with stock cooler and [email protected] mem 1600 with water. This card got the "black screen" problem... had to send it RMA.

The other card I havn't have time to test much yet, but core clocks at least 1180Mhz@1,188V with stock cooler.

2xhd7970dc2.jpg
 
Results
1100 Core
1500 RAM
1.250 volts (1.613 Mem)

Type of Card
Sapphire HD7970 Dual-X OC with Boost

Overclock Tool
MSI Afterburner 3.0.0. Beta 10

Stability Test
Valley Extreme HD 1920x1080p without artifacts
30 minutes of Metro Last light 1920x1080p Very High with 2xSSAO without artifacts

---

7970_OC.jpg



---

Was really hoping to hit 1200/1600 and call it a day. Big fat NOPE! :)
The "lowered expectations" theme began playing in my head as soon as I started seeing artifacts in Valley at just 1025 Core clock on stock volts (1.175). Many people reported hitting 1100 or more on stock, but guess I need a higher ASIC card? GPU-Z shows ASIC=59.5%

I used the bios switch to "boost" it to 1000. Figured I could go another 100 Mhz easily. But afterburner reported it still at 950 Mhz :confused:?? And GPU-z reported default clock at 1000, GPU clock at 950 (still confused). Anyway, I pretty much had to bump the voltage until I hit stability at 1125 Core clock at 1.250 Volts. I brought it down 25 MHz to 1100 just to be safe.

The memory was at 1425, boosted via bios to 1450. Went to 1500 and started seeing artifacts in valley again, so had to bump mem voltage from 1.600 to 1.607. Bumped it another notch to 1.613 just to feel safe.

Temps are at 69c on load even with a relatively quiet fan profile 60% (case is open right now, it'll probably be even quieter!).

Still debating whether to bump it to 1.3v and see what more I can get out of it, or just live with what I have.
 
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My Vapor X HD7950 over clocked after using a BIOS editor on the BIOS.

OCVX7950.jpg


I have water cooled it and I think it has more room on core for over clocking but I just have to figure out how to tweak voltage.

VaporXHD7950WAR.jpg



The Elpida memory is tough to over clock. 1500mhz is about as fast as I can get it to go.


The card games great.
 
I'm happy and I don't even have it under water yet :D

Powercolor 7970 non-ref

1125 core (have not tried to go higher)
1505 mem (have not tried to go higher yet)
1.138v
+10%

Furmark and Metro: LL

max temp is 84c on stock cooler.

oc_zps38dc6169.jpg
 
84C is pretty high. And FYI furmark is not really a valid testing software anymore. Try Valley benchmark looped for a more accurate stability/temp test.
 
naticus said:
84C is pretty high. And FYI furmark is not really a valid testing software anymore. Try Valley benchmark looped for a more accurate stability/temp test.
Click to expand...

Agreed, backed the clocks down to 1050/1400 and undervolted to 1.15 till I get it under water.

Ran Valley in loop for 2 hours, never went above 77. Just good to know I have a damn good card for when it gets wet :)
 
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