The Radeon 7850 is an overclocking beast

[Jaydip]

Well Dirt Showdown could fetch 49$ at the beginning 😉 No idea just saying.

 

[blastingcap]

I love my 7850.

at 768p/1080p that I use it at, its a beast for the tiny amount of power it uses.

I have the Asus Direct Cu II, which uses the same cooler as the 7900 series... as the cooler is a good 2+ inches bigger/longer than the actual card. Never seen this before.

Ordinarily I like ASUS and own many ASUS products, but I just could not get over the fact that they were so lazy in engineering that they didn't develop a 7850-specific fan. The hardware.fr thermal images of the XFX DD cards proved how crucial spacing is, so I have my doubts that the oversized ASUS 7850 fans are blowing in the correct areas of the PCB, if those fans were designed for another board. And ASUS had problems with GPU contact or paste or whatever in their 79xx cards... not sure what the heck is going on in their video card engineering department nowaday.

 

[Quantos]

Wow, that huge cooler on the small PCB looks absolutely retarded. There's a fan wasting itself on this thing. A 7850 shouldn't require two fans in the first place, but indeed this is just lazy.

 

[tuffluck]

Yep, it's on Guru3D, under "Fixing overclocking problem"

You'll want to follow this guide to extract the files from 12.1's for example, and use them to fix the latest driver set.

followed this with my sapphire 7850, no dice. i have tried also in conjunction with this and separately, editing the msi config file and editing registry with enableulps=0. i have found that if i just change the "unoffocialoverclockingmode" in the config file, when i open the program everything is set to 0 and i cannot change anything. i type in "1100" for core clock and hit apply and it goes back to 0.

anyone else having this problem? i don't know what to do...i seem to have tried everything and nothing works. if i follow the instructions on guru3d that were posted, the result is msi afterburner works, but only up to 1050/1450, which is exactly what i'm trying to exceed.

dumb question perhaps, but do i need to uninstall CCC in order for any of the above to work? i'm stumped.

 

[tigersty1e]

What are the average overclocks with these cards?

no cherry picking review cards.

 

[Zebo]

1200Mhz seems no problem once you get Asus software installed to unleash these cards. See thread in op.

 

[Zebo]

Ordinarily I like ASUS and own many ASUS products, but I just could not get over the fact that they were so lazy in engineering that they didn't develop a 7850-specific fan. The hardware.fr thermal images of the XFX DD cards proved how crucial spacing is, so I have my doubts that the oversized ASUS 7850 fans are blowing in the correct areas of the PCB, if those fans were designed for another board. And ASUS had problems with GPU contact or paste or whatever in their 79xx cards... not sure what the heck is going on in their video card engineering department nowaday.

Ridiculous ghetto as hell. Best looking card is the XFX imo.

 

[tigersty1e]

Do these reference cards have the same wierd gpu recess like the 7900 gpu cards?

I'm looking to fit a shaman on one of these cards if I get one.

 

[VirtualLarry]

Would a 7850/7870 be a good replacement for GTX460 1GB, for Folding@home, BOINC, PrimeGrid, Milkyway@home, etc.?

Looking to reduce my temps and power usage, and keep performance largely the same.

I don't know if PrimeGrid runs on ATI cards at all. I know that MW@home runs on OpenCL, which means that their WUs run on both ATI and NV cards. (I have it running on both my Q9300 rig with a 4850, and my 1045T X6 rig with twin GTX460 1GB cards, although not running on the GTX460 cards currently because of warmer weather.)

 

[fstime]

After every single $500 ASUS 7950 DCII ended up being defective by design and no VRM cooling on the 7970 models, no way in hell I would touch another ASUS non-reference card.

Lazy bastards couldn't design a new heatsink.

If you wan't non-reference, go Sapphire.

 

[Concillian]

Would a 7850/7870 be a good replacement for GTX460 1GB, for Folding@home, BOINC, PrimeGrid, Milkyway@home, etc.?

Looking to reduce my temps and power usage, and keep performance largely the same.

I don't know if PrimeGrid runs on ATI cards at all. I know that MW@home runs on OpenCL, which means that their WUs run on both ATI and NV cards. (I have it running on both my Q9300 rig with a 4850, and my 1045T X6 rig with twin GTX460 1GB cards, although not running on the GTX460 cards currently because of warmer weather.)

I think power usage would be ~same with big performance increase. I don't really know relative performance for GCN / Fermi in your DC apps, though, software can make a big difference.

According to BENCH:
http://www.anandtech.com/bench/Product/542?vs=549

Yeah, that looks to be the case. Big performance increase, ~ same power usage.

7770 is probably more along the lines of similar performance / lower power, but it might end up a little slower than a 460. Again, I don't know if the apps you're using favor one or the other.

 

[tigersty1e]

After every single $500 ASUS 7950 DCII ended up being defective by design and no VRM cooling on the 7970 models, no way in hell I would touch another ASUS non-reference card.

Lazy bastards couldn't design a new heatsink.

If you wan't non-reference, go Sapphire.

I'm not sure it's about being lazy about the design. It's so easy just to design it smaller.

The problem is on the manufacturing side. They probably already made hundreds of the coolers sitting in the warehouse. And the machines are already made out to design them that way.

 

[Zebo]

This gigabyte looks like it would be silent with those huge 120mm fans allowing for lower rpm and may allow great Ocs when you move then higher.... anyone try one?

 

[jacktesterson]

This gigabyte looks like it would be silent with those huge 120mm fans allowing for lower rpm and may allow great Ocs when you move then higher.... anyone try one?

Its anything but silent.

I originally bought one due to the high stock clocks and fan size, but after reviewing other sites about the card, the general consensus is its one of the poorer choices for a 7850 so I never accepted the shipment from newegg. Way too many complaints about poor build quality of the Fans/Heatsink, Rattling noises from cheap plastic....

The fans on that Gigabyte are dirt cheap too.

My Asus is running at 1200/1450 @ 1.145v. I haven't had a need to try to push it further. 40% overclock with a tiny voltage bump? Yeah, this thing is awesome.

 

[Jaydip]

After every single $500 ASUS 7950 DCII ended up being defective by design and no VRM cooling on the 7970 models, no way in hell I would touch another ASUS non-reference card.

Lazy bastards couldn't design a new heatsink.

If you wan't non-reference, go Sapphire.

This is the first time i 'm hearing this.ASUS DCII cards tend to be excellent.

 

[CKXP]

I just wanted to chime in for those considering buying a 7850, remember "YMMV" Unfortunately for me my HD 7850 MSI Twin Fozr II isn't the overclocking beast that I hoped it would be. Mine will not run at anything above 1185, no matter how much voltage I push. Kind of disappointing especially after seeing some of these 7850's hitting 1200+

 

[BallaTheFeared]

What do you get in 3DMark11 for a gpu score @ 1185?

 

[Arzachel]

I just wanted to chime in for those considering buying a 7850, remember "YMMV" Unfortunately for me my HD 7850 MSI Twin Fozr II isn't the overclocking beast that I hoped it would be. Mine will not run at anything above 1185, no matter how much voltage I push. Kind of disappointing especially after seeing some of these 7850's hitting 1200+

Tried tweaking memory clocks? Try setting the memory clocks and voltage at stock and just up core clocks. When you hit a limit, up voltage slightly until you reach the max voltage you're willing to run. After that, try raising memory clocks to find the best balance between memory and core.

Memory is quite often the cause of instability, when people think that it's their core clocks.

 

[CKXP]

Tried tweaking memory clocks? Try setting the memory clocks and voltage at stock and just up core clocks. When you hit a limit, up voltage slightly until you reach the max voltage you're willing to run. After that, try raising memory clocks to find the best balance between memory and core.

Memory is quite often the cause of instability, when people think that it's their core clocks.

I ran the memory at stocks speeds while I was trying find my gpu limit, the voltage was raised as far as Asus gpu tweak would allow (1.225)...it just seems to hit a wall for anything above 1185...temps seemed fine around 70c with the fans running at 90%. Currently I'm running at 1125/1500 with 1.135v

 

[Don Karnage]

I ran the memory at stocks speeds while I was trying find my gpu limit, the voltage was raised as far as Asus gpu tweak would allow (1.225)...it just seems to hit a wall for anything above 1185...temps seemed fine around 70c with the fans running at 90%. Currently I'm running at 1125/1500 with 1.135v

That's alittle disconcerting

 

[kalrith]

That's alittle disconcerting

Maybe he's an nvidia employee making up this story to keep us from buying the 7850 :biggrin:

I agree that it's disconcerting, but I'm glad somebody posted this. So often the only posters for overclocks are the ones who got really good overclocks. I still remember my opteron 165 that wouldn't go past 2.5 GHz even though "everybody" was able to oc to 2.7-2.8 GHz.

 

[SickBeast]

1185mhz on the core is still beastly and represents a 35-40% overclock. GPUs *never* overclock to this degree. My GTX 460 went from 720 to 950; that was maybe 30% and represented an excellent overclock.

My card will be arriving on Thursday and I will let you know what I can do with it. It might have to wait until the weekend depending on whether or not my AMD rig is functional.

 

[notty22]

According to this collection of o/c results of the 7850/7870, the 7870 got slightly better results. TPU, showed they both came with a stock voltage of 1.24

7870
Desktop300 MHz150 MHz0.83V
Multi-Monitor300 MHz1200 MHz0.90V
Blu-ray Playback1000 MHz1200 MHz1.23 V
3D Load1000 MHz1200 MHz1.24 V
7850
Desktop300 MHz150 MHz0.83V
Multi-Monitor300 MHz1200 MHz0.91V
Blu-ray Playback860 MHz1200 MHz1.23 V
3D Load860 MHz1200 MHz1.24 V

 

[SickBeast]

notty those values from the reviews are not valid because they were capped at 1050mhz on the core (aside from techpowerup).

most people are hitting 1200mhz no problem.

 

[notty22]

notty those values from the reviews are not valid because they were capped at 1050mhz on the core (aside from techpowerup).

most people are hitting 1200mhz no problem.

They were valid when the reviews were done. The 7870 also had a cap of 1400mhz, in CCC and they still AVG 1200. They may all come close to 1200, that's what this thread is here to discuss.
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