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!
This might help too:
Thanks Phil :)
Great job phil, congrats.:D
stealth
awsome work mate :), Thanks
Shit, that's a proper bitch of a mod. No wonder nobody had figured it out without the datasheet before. :D
EDIT: Maybe I should be a bit grateful as well. Big thanks, Phil!
thank
Thanks for sharing :)
Share the mods. Great job Phil!
Nice, but its too "hard" for me. Maybe sometime :-)
Thanks for sharing Phil!
I'm not going to be touching it with a ten foot pole...my hands aren't that steady and my soldering station isn't that sharp. It's very helpful for those with the guts and steady hands though. Always good to see those with the electronics know-how sharing with the community. Two thumbs up!
thanx buddy!!!
"Some people already knew the OCP modification, but didn't disclose the information in a way less gifted overclockers could understand." = LOLZ
'Some people'.. yes the 5-6 that wont post anything publicly on the mods.. :)
**Glad to see folks breaking out of their shells to share the wealth! Keeping mods to yourself is for folks that are afraid of friendly competition.. or just like to play by/with themselves :P
Big thanks to the gent for sharing.
What is difficult about it? It looks like any other mod I look at to the untrained eye - looks like just a handful of solder points.
haha i agree, it is nice for Phil to post this.
Figuring it out without a datasheet by experimenting. I would imagine. Performing it isn't special apart from the number of solder points. :)
thanks for sharing guys, good to see Greeks continuing with this tradition :)
Thank you for sharing now if only I could see well enough to try this mod. :p
What he said :D
Awesome work and great for sharing it with us!
I have to ask. Are these 1 watt, 1/2 watt or 1/4 wat resistors? Or does it not matter?
it dosent matter any Resistor will do i use small Smd resistors for the mod and i works fine
radioshack resistor pack has 10pcs and 5pcs of the common resistors
Yea i have them. I was going to solder it up last night but decided to try flashing instead. I learned one thing...nothing can replace a hard mod. Then again its easier to survive a bad bios flash than it is to survive a hard mod gone wrong. Is it worth destroying a 600 dollar card? Hell yea!!!
Can you say. Burned up VRM?
Burned up vrm
sizzling vrm
Smells like amperes. So... you flashed the BIOS and the card is dead? What BIOS?
amperes maybe, but mine blew from too much vcc.
No i didnt flash it. Well i did flash it with the OCP bios on the XS forums and it didn't work (it kept black screening on me) so i flashed back to the stock one. I burned up VRM with the OCP mod.
Edit: It's only fair to mention that i did turn the card on to see if it would actually fire up without proper cooling and heat sinks on the vrms.
Was it instant or after/during benching? I've heard of a few people burning up the PWM with the OCP mod.
Check my edit^^^^ No it was not instant. And the card still works believe it or not. It just don't think it can be pushed anymore.
imagine single phase mode... :D
They made more cards at the factory last night. So i'm good.
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? :)
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 :)
These are reference Sapphire, a phase missing. I didn't choose them, I just handed over some money and said "two please" :p
Also doing 2 cards for another UK bencher, so my worktop looks sexier than usual at the moment :D
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
awesome mod kenny. :)
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.
Can I send you a few card for modifications Kenny?
Great modding skills there.
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
Thanks for the compliment, but the shipping cost alone would be mental. There must be someone closer?
You mean you can change llc after modding OCP(with my or similar way)and bring it back to normal level?Have you tried both ways and both burned vrms?
Don't misunderstand me I am just asking because I haven't tried changing llc back to normal levels after OCP mod(guess can be done with RIVE),because I only tried the mod in two reference cards and none of them burned any mosfets.They just degraded their cores.
Giga 7970oc does not need any mods, just bios and software, you can control llc via software and other parameters
Kenny, I tosted the bottom PWM on my reference Sapphire card
Did the OCP mod, PWM's had heatsinks and a 110CFM fan.
Past 1550, though the bottom heatsink/PWM was hot as all hell.
1600 run turned it to toast.
The modding took long than the card was alive for lol
I just tried 3D11 at a puny 1200MHz (water) and I wasn't happy at the PWM temps. IMO we need a front-and-back heatsink + airflow for anything that doesn't involve the stock cooler. First LN2 pot for PWM ? :p
Mine lit up like a LED when it burned up. LMFAO
We should talk to Rbuass for the mod. He seems to have it down.
http://www.hwbot.org/forum/showthread.php?t=43862&page=31
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