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Radeon HD 7970 OCP Mod released by phil from HWBOX.gr

Some people already knew the OCP modification, but didn't disclose the information in a way less gifted overclockers could understand. Phil, now #2 in 3DMark11 1x GPU, figured out the modification that helped him push the card over 1600MHz GPU and shared it with the rest of the world.

Top result, top modification, top overclocker!

We all know phil and the fact that he managed to achieve several great scores with his Radeon HD 7970. Today, we are proud to be the world's first who reveal the new OCP mod for the HD 7970. So far it looks like it was a well kept secret, but phil did not hesitate to reveal it to us and then, to everybody else to! Congratulations phil for figuring out the mod. We sincerely wish that everybody overclock their HD 7970 cores at 1700MHz or even more MHz - these cards do have amazing overclocking potential.

Does the mod work? Of course! Before the mod, phil's HD 7970 could only bench 3DMark 11 up to 1550MHz core. After the mod, without pushing it much, it's already up to 1620MHz for 3DMark 11, and still has more potential!

Well done phil, well deserved my friend!


Jan 25, 2012 - article - hwbox.gr
  #31  
Unread 04-30-2012, 23:45
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imagine single phase mode...
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  #32  
Unread 04-30-2012, 23:49
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They made more cards at the factory last night. So i'm good.
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  #33  
Unread 05-03-2012, 23:51
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For the guys who have burned their PWM after doing this mod, please can you highlight on a picture which components fried? Please can people spread this around other forums and get as many affected people as possible to post pics?



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  #34  
Unread 05-12-2012, 17:20
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....with a jumper to enable/ disable
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  #35  
Unread 05-12-2012, 17:58
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you could have gotten the sapphire card, it had an extra phase.

nice mode btw.

as for the burn...its the bottom mosfet.
my suspect is

1. that it goes into single phase hence toasting it.
2. or too much vcore setting.

i'll send you a heatsink for the vrm...it needs a little filing
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  #36  
Unread 05-12-2012, 18:04
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These are reference Sapphire, a phase missing. I didn't choose them, I just handed over some money and said "two please"

Also doing 2 cards for another UK bencher, so my worktop looks sexier than usual at the moment

I can't see why the card would go into single-phase mode. Changing the current limit should make the card fail in the same way as it would without the mod
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Last edited by K404; 05-12-2012 at 18:28.
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  #37  
Unread 05-12-2012, 19:05
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awesome mod kenny.
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  #38  
Unread 05-13-2012, 09:10
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Very nice mod kenny.As for the burned VRMs I believe it has to do with the loadline calibration that changes after the mod and keeps the core voltage constant.Probably those mosfets are operating very close to their limits when the OCP is engaged and after passing this current limit combined with the constant core voltage,they are getting way off their specs.
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  #39  
Unread 05-13-2012, 10:18
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Can I send you a few card for modifications Kenny?

Great modding skills there.
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  #40  
Unread 05-13-2012, 10:22
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Phil it can't be llc, I can force it with software to whatever level I want as well as PWM frequency.... Don't think that's killing that MOSFET
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