7970 Overclocking results thread.

[VulgarDisplay]

Just interested to see what everyone has gotten so far.

I didn't even set powertune I just put the sliders all the way to the right.

1125/1575 at stock voltage.

What's everyone else gotten? I delve into afterburner tonight after work.

 

[blackened23]

sapphire 7970 with a msi 7970 in crossfire.

Both GPU's do 1125/1575 at stock. In single card mode i've oc'ed GPU1 up to 1250 / 1600 stable 1.25V, and the performance is monstrous - but I have to use 65% manual fan.

In dual GPU I can only OC GPU 1. GPU2 is stuck maxed at 1125/1575, can't figure out how to get around this. I can OC GPU1 as normal. Halp.

 

[VulgarDisplay]

Oh, perhaps leave what temps you are getting also. I assume less than 80C is desirable correct?

 

[RavenSEAL]

Oh, perhaps leave what temps you are getting also. I assume less than 80C is desirable correct?

The lower the merrier. Always.

I tend to prefer noise over heat. That is however, because whenever my cards are running that hot, I tend to have my Sennheisers on.

 

[nitromullet]

Deleted. Off-topic. Don't want to derail thread.

 

[RavenSEAL]

See above

 

[nitromullet]

Deleted. Off topic

 

[Ferzerp]

Sweet. Will do. I have an RMA for a replacement approved by newegg. I won't be able to ship the card out until Monday anyway, so I have time to try to sort things out. I can always cancel my RMA.

You're RMA'ing a product because it works exactly as advertised and you didn't get free performance?

 

[nitromullet]

Deleted. Off topic

 

[MrK6]

You're RMA'ing a product because it works exactly as advertised and you didn't get free performance?

You can RMA a product for whatever reason you want; it's up to the company to accept it or not and apply any applicable fees.

I've owned enough video cards from both AMD and NV to know that isn't normal behavior. If the driver fixes this issue, I will cancel the RMA.

Are you at stock clocks? Have you tried different drivers?

 

[nitromullet]

Are you at stock clocks? Have you tried different drivers?

Yeah, I just grabbed the latest drivers too. You guys really should keep this an OCing thread, and not a fix my issues/RMA debate thread.

If I need any advice, I'll start a new thread. Sorry for the crap!

 

[blackened23]

Sweet. Will do. I have an RMA for a replacement approved by newegg. I won't be able to ship the card out until Monday anyway, so I have time to try to sort things out. I can always cancel my RMA.

Couple of things that will affect oc stability:

1) Don't bother with powertune in ccc, you _need_ to use msi afterburner with the -xcl argument
2) Do not sync graphics cards in afterburner in crossfire
3) Powertune raises TDP and removes downthrottling, however if you want to incraese voltage you must do it in afterburner
4) On this same note, don't just oc stability until you've oc'ed *and* used manual fan. Sometimes auto fan is not adequate for cooling the VRM!

 

[x3sphere]

On mine, 1075 is max on core, upping volts to 1.3v doesn't change a thing.

 

[SlowSpyder]

I'm at 1075 on stock clocks and counting. I'm going to see where I can get to this weekend and than start playing with the voltage if need be.

 

[SpicyTime]

I have a 1.05V stock VID 7970. When I up the voltage to 1.175V, I can get 1200/1675 with load temps at 87C and fan on auto (which goes to 51% at load temp). I haven't decided whether I want to keep it at this level or not. My other setting is 1.15V with 1150/1600, giving a load temp of 80 and fan on auto (which goes to 40% on load temp).

In both cases, I have a very high idle temperature of 71C. I'm currently running a 20-30-20 PLP setup, so my memory clock never goes into 2D idle mode. At stock speeds, I have an idle temperature of 60C (normal for 7970 using multimonitor). I'm also debating whether to lower the memory clock in order to decrease the idle temperature. What do you guys think?

 

[blackened23]

Has anyone managed to overclock GPU2 in crossfire mode?

I know both of my cards can do at least 1250 single, (tested both separately) but GPU2 is limited to 1125 apparently in MSI afterburner. I can OC GPU1 but not GPU2. I need ballathegreat to fix my setup or something and oc the bejesus out of it

 

[nOOky]

I simply cranked my card up to the max allowable in CCC and left it alone. Nary a glitch, I may have a good card that will go much higher, but I'll leave it alone for now.

 

[VulgarDisplay]

The fan on this thing is good and bad. It's the quietest blower fan I've heard up until you hit 50% then the noise rapidly increases. My temps seemed pretty good at 1125/1575, so i didn't feel the need to make a new fan profile.

 

[Dravic]

This thing is crazy.. ran out of room in Overdrive at stock, downloaded triXX

Diamond HD 7970
1225/1650 @ 1.25v

3dmark11 p8342

benched with fan @ 75%, max temp in triXX was 63c



Have a side grade coming with a FX8150, cant wait to see the comparison to this PH II x6

 

[badb0y]

I am at 1125 core / 1375 mem with 1.150 vCore

Once I get water/more robust air cooler I will push this thing to the max.

 

[WMD]

Wrong thread delete please

 

[Panopticon]

I have mine @ 1175/1575 it has never gone above 76c for me, in bf3 it hovers around 74. The fps gains you get from oc are pretty nuts really the main benefit ive seen is keeping my minimum frames much higher I game with vsync so on so keeping my fps from straying too far from 60 is important for me.

 

[AdamK47]

I dropped the clocks on my three 7970s down to 1050MHz from 1100MHz. I was seeing corruption in the Unigine benchmarks. Particularly the Tropics demo in DirectX 11. Let it loop with vsync off and you'll see full utilization of all cards. Seems to be a very good test to see corruption compared to anything else I've tried.

The cards have been very good on the memory front. I've been able to raise the clock speeds on each card to 1650MHz. It's been stable after a 1 hour loop of Tropics.

Here's an updated 3DMark11 score:

http://3dmark.com/3dm11/2599885

Full Specs:
Intel Core i7 3960X @ 4300MHz
Asus P9X79 Deluxe @ 43 x 100MHz
16GB Corsair XMS3 @ 2133 DDR
Three HD7970 in Tri-Fire @ 1050/1650
120GB Vertex 3 SSD
Two 3TB Deskstar 7K3000 in RAID-0 - 6TB
1TB SpinPoint F1
Pioneer BDR-206 BD-RW
Sound Blaster X-Fi HD USB
Cooler Master HAF-X case
Prolimatech Megahalems cooling
Corsair AX1200 power supply
Razer BlackWidow Ultimate keyboard
CST LaserTRAC 2545W trackball
DoubleSight DS-307W monitor
Shure SRH840 headphones

 

[MrK6]

Here's an updated 3DMark11 score:

http://3dmark.com/3dm11/2599885

Absolutely fantastic performance you're getting there, that truly is something. :thumbsup:

I've had my card as fast as 1340/1775, but that's only for benching. General gaming I stick to 1125/1575 (CCC limits) because it runs everything fine. If I do take on something more demanding I will boost the clocks to 1300/1600. Right now I'm mainly playing SWTOR, so it's not required.

 

[blackened23]

Someone teach me how to put my stuff under water