Real HD 7770 ???

[The321]

Can someone tell me if the picture is a real HD 7770 .

[Herman Mcpootis]

turns out it is a legitimate hd 7770. one of the weirder designs i've seen though:

https://www.gigabyte.com/us/Graphics-Card/GV-R777OC-1GD-rev-10

[The321]

Can someone tell me how much a HD 7770 is worth ?

[Electronics Wizardy]

where are you?

 

id say about 50-60 usd.

[MadOverclocker]

$25-60. If it has everything in the box max 70. I got a 7850, everything in box and not used for mining at 66.50$ and 11$ for shipping (I lived in PR at that moment)

[The321]

I want to overclock a HD 7770. I have a couple of questions.

 

1) can the voltage be changed on this card if yes what's safe maximum ?

 

2) how many performance increase could I expect in % 

[KarathKasun]

Safe voltage depends on the VRM when talking about cheaper cards.  I would say 1.2v would be reasonable.

 

Expect 10%, 20% if you are lucky.

[Jurrunio]

Just push the voltage slider all the way up. The upper limit is locked by the vBIOS anyway

 

HD 7000 series cards arent known for being good overclockers. 5% is what I'd expect and 10% is already a lot.

[KarathKasun]

3 hours ago, Jurrunio said:

Just push the voltage slider all the way up. The upper limit is locked by the vBIOS anyway

 

HD 7000 series cards arent known for being good overclockers. 5% is what I'd expect and 10% is already a lot.

HD 7850 and 7870 would like a word with you.  Stock clocks at around 1ghz and overclocks in the 1.2ghz range were fairly common.  10% (~1100) would be the minimum Id look for.

 

https://www.techpowerup.com/reviews/Powercolor/HD_7770/29.html

[SimplyGone]

16 minutes ago, KarathKasun said:

HD 7850 and 7870 would like a word with you.  Stock clocks at around 1ghz and overclocks in the 1.2ghz range were fairly common.  10% (~1100) would be the minimum Id look for.

 

https://www.techpowerup.com/reviews/Powercolor/HD_7770/29.html

You know you people sound like apes in my head when i read comments like this.  Stop FUCKING turning it into a war!!

[KarathKasun]

4 minutes ago, YouSirAreADudeSir said:

You know you people sound like apes in my head when i read comments like this.  Stop FUCKING turning it into a war!!

Turning what into a war?  The comment that HD 7000 series were "bad overclockers" is objectively false.  They were one of the best overclocking chips since Fermi, where GTX 470's were hitting 50%+ overclocks on air.

 

Before the Ghz edition rebranding, you could get around a 40% OC on the HD 7000 series.

[Jurrunio]

6 hours ago, KarathKasun said:

Turning what into a war?  The comment that HD 7000 series were "bad overclockers" is objectively false.  They were one of the best overclocking chips since Fermi, where GTX 470's were hitting 50%+ overclocks on air.

 

Before the Ghz edition rebranding, you could get around a 40% OC on the HD 7000 series.

Have you take the particular card OP is consider buying into consideration? It's already factory overclocked to 1100MHz, so there's not much headroom left. It's also clearly not the toughest PCB and cooler design.

 

By 'good' overclocker, I'm talking about the Nvidia 900 series cards. Even with heavy factory OC they just overclock as if factory OC doesnt exist.

[KarathKasun]

GTX 900 series were not "good overclockers" if you looked at actual stock boost vs OC boost.

 

A ~250 OC was what you were looking at on the reference 980.  From a 1250 stock boost, that is only 20%.  On OC models the percentage you could OC was quite a bit less, Usually in the ~10% range.

 

So the HD 7770 getting to 1200 from 1000 is about the same percentage wise compared to you "good overclocking" GTX 900 series.  Same goes for pre-overclocked cards, about 10% left in the tank.

 

Some people with this exact card were hitting 1300+ with ~1.275v on stock air cooler with better fan curves.

https://www.3dmark.com/3dm11/6857699

[Jurrunio]

4 hours ago, KarathKasun said:

GTX 900 series were not "good overclockers" if you looked at actual stock boost vs OC boost.

 

A ~250 OC was what you were looking at on the reference 980.  From a 1250 stock boost, that is only 20%.  On OC models the percentage you could OC was quite a bit less, Usually in the ~10% range.

 

So the HD 7770 getting to 1200 from 1000 is about the same percentage wise compared to you "good overclocking" GTX 900 series.  Same goes for pre-overclocked cards, about 10% left in the tank.

 

Some people with this exact card were hitting 1300+ with ~1.275v on stock air cooler with better fan curves.

https://www.3dmark.com/3dm11/6857699

3dmark isnt a good way to tell overclocking results because you never know whether a modded BIOS or even crazy cooling is used (like this one https://www.3dmark.com/spy/1803627), but since you accept that:

This is a gtx 980ti reaching 1647 MHz. At stock clocks with GPU boost a GTX 980ti tops at around 1200MHz, so it's a 37% OC

https://www.3dmark.com/spy/2710843

 

 

 

[xAcid9]

19 hours ago, The321 said:

I want to overclock a HD 7770. I have a couple of questions.

 

1) can the voltage be changed on this card if yes what's safe maximum ?

 

2) how many performance increase could I expect in % 

1) Probably not.

 

2) Hard to say, the card already factory overclocked to 1100mhz. Probably very little gain.

18 hours ago, Jurrunio said:

Just push the voltage slider all the way up. The upper limit is locked by the vBIOS anyway

 

HD 7000 series cards arent known for being good overclockers. 5% is what I'd expect and 10% is already a lot.

I don't think so, you can put 1.4v in MSI Afterburner and it will get 1.4v which will kill the card pretty quickly.

HD7000 series actually a good overclocker if you count reference model as base clock.

[KarathKasun]

3 hours ago, Jurrunio said:

3dmark isnt a good way to tell overclocking results because you never know whether a modded BIOS or even crazy cooling is used (like this one https://www.3dmark.com/spy/1803627), but since you accept that:

This is a gtx 980ti reaching 1647 MHz. At stock clocks with GPU boost a GTX 980ti tops at around 1200MHz, so it's a 37% OC

https://www.3dmark.com/spy/2710843

 

 

 

Those are just the proof links, the person who got those results is a member over at OCN (they are actually a moderator over there).  He didnt believe what he was seeing either and was asking if his card was an outlier.

http://www.overclock.net/forum/70-ati-drivers-overclocking-software/1277961-overclocking-hd-7770-a.html

 

And yes, the GTX 980 reference cards topped out at 1250 boost.  Boost clocks can and do go over what the spec says.  This is why people thought that the 900 series were overclocking gods, they saw something like 1100core/1200 boost on the box and immediately added 150-250mhz with a tuning app before checking actual boost clocks.  Then they get all giddy like a schoolgirl when they see 1400-1500 in the logs.