The Radeon 7850 is an overclocking beast

[Kastor Krieg]

So have I to reported this user it's makes no sense to me why someone would argue with another person whom has made wild claims but never offers any proof and documentation to back up such claims sigh face palm :-( But really come on an 850+ post mantra about a GPU that performs as well as a 6950 and has problems holding a steady OC probable cause it is missing the extra 6pin and small PCB that it's bigger brother has.

:wub:

To invoke the hive-mind representing chaos.
Invoking the feeling of chaos.
Without order.
The Nezperdian hive-mind of chaos. Zalgo.
He Who Waits Behind The Wall.
ZALGO! He comes.

Sure here you go. Running at lower resolution puts more stress on CPU so it will advantage the 2500k but whatever. I've actually been spending more time with my PC benching than playing games. Gonna try and go for 1200 tonight. i'm such a geek.

FPS:
61.5
Scores:
1550
Min FPS:
26.6
Max FPS:
127.8

See? The general mean FPS is the same, score is about the same, top FPS exactly the same - that's the card itself - but I also got 25% more minimum FPS and that's where the CPU shows. I'm currently running it @ 4.6 Ghz. I have a 4.8 Ghz config, but it's 04:20 here now and I just don't have it in me to reclock it and bench again. I believe though, the differenc in minimum FPS would be even more pronounced.

FPS:
63.2
Scores:
1593
Min FPS:
33.1
Max FPS:
128.8

 

[SickBeast]

So have I to reported this user it's makes no sense to me why someone would argue with another person whom has made wild claims but never offers any proof and documentation to back up such claims sigh face palm :-( But really come on an 850+ post mantra about a GPU that performs as well as a 6950 and has problems holding a steady OC probable cause it is missing the extra 6pin and small PCB that it's bigger brother has.

???

How does the 7850 have trouble holding an overclock? What are you even talking about?

You're not making any sense. Did you report yourself to the mods? Is that what you're saying???

 

[Bryson777]

See? The general mean FPS is the same, score is about the same, top FPS exactly the same - that's the card itself - but I also got 25% more minimum FPS and that's where the CPU shows. I'm currently running it @ 4.6 Ghz. I have a 4.8 Ghz config, but it's 04:20 here now and I just don't have it in me to reclock it and bench again. I believe though, the differenc in minimum FPS would be even more pronounced.

FPS:
63.2
Scores:
1593
Min FPS:
33.1
Max FPS:
128.8

Ok I'm officially a sad panda. I was all ready to come in here all lololol about going for 1250 in 3dmark but heaven is totally kicking my ass!. Best I could do is 1175/1375 @ 1.23v which is still not too bad. I re-did the heavens benchmark @ 1680 and while my FPS improved I got the exact same minimum frame rate which is where my CPU comes into play. Sucks cuz I'm not quite able to break 30 minimum frames in crysis @ 1080p.

FPS:
65.3
Scores:
1644
Min FPS:
26.6
Max FPS:
137.6

 

[Kastor Krieg]

Hm, I'm getting purple flickering discoloration, kind like artifacts, but ONLY on antialiased font borders, when "morphological filtering" is switched on. So far, I noticed this in Battlefield 3. I also get artifacts all over the place in Heaven, when "triple buffering" is on.

Broken card or a driver issue (12.6 Beta)? Trip-buff is a separate option, marked as OpenGL (no idea why, it was a regular option with nV?), so that might explain part of the issue. But what's up with MLAA? It does color adjustment at the edges, maybe that's why it purples out the blurry magenta fonts? <scratches head>

 

[turn_pike]

Is there a database / 7850 club thread where we have a database of overclock result achieved with this card ?
Overclockers.net often have one of these with OC friendly CPU but I cant find one for GPUs.

Having a great overclocker card gives you a lot of incentive to come into the forum and brag about it. So we obviously have a self selection bias going on over here but it is still MUCH better than no data at all.
If I cant find any 7850 OC results compilation I will go through this thread tomorrow and make a little Excel spreadsheet.

PS:

???
You're not making any sense. Did you report yourself to the mods? Is that what you're saying???

Yah. Gordon Freemen is just very trigger happy about notifying the mods. I got this PM from him for putting part of post in spoiler tags.

Remove your blacked out post or I will have to call in the heavies

Crazeh !

 

[antihelten]

Is there a database / 7850 club thread where we have a database of overclock result achieved with this card ?
Overclockers.net often have one of these with OC friendly CPU but I cant find one for GPUs.

Having a great overclocker card gives you a lot of incentive to come into the forum and brag about it. So we obviously have a self selection bias going on over here but it is still MUCH better than no data at all.
If I cant find any 7850 OC results compilation I will go through this thread tomorrow and make a little Excel spreadsheet.

hwbot is one such site:

http://hwbot.org/hardware/videocard/radeon_hd_7850/

However as you yourself mention there's probably quite a bit of selection bias.

Curiously enough the average of 1186 MHz from 82 samples is exactly the same as techpowerup achieved from their 4 samples (done without overvolting, in techpowerups case)

http://www.techpowerup.com/reviews/Powercolor/HD_7850_PCS_Plus/31.html

 

[Don Karnage]

hwbot is one such site:

http://hwbot.org/hardware/videocard/radeon_hd_7850/

However as you yourself mention there's probably quite a bit of selection bias.

Curiously enough the average of 1186 MHz from 82 samples is exactly the same as techpowerup achieved from their 4 samples (done without overvolting, in techpowerups case)

http://www.techpowerup.com/reviews/Powercolor/HD_7850_PCS_Plus/31.html

Im not sure why Wizzard doesn't overvolt

 

[turn_pike]

Took more than an hour (probably closer to two) but here is the compilation of the 7850 oc result from this thread.
I did not double check so feel free to pm me if you see inaccuracies in there.

For the memory clock, either divide or multiple by four. I was too lazy to correct them all.

Just for comparion sake I threw in the quite obsolete compilation of reviewers oc result from earlier in this thread:

 

[Don Karnage]

Took more than an hour (probably closer to two) but here is the compilation of the 7850 oc result from this thread.
I did not double check so feel free to pm me if you see inaccuracies in there.

For the memory clock, either divide or multiple by four. I was too lazy to correct them all.

Just for comparion sake I threw in the quite obsolete compilation of reviewers oc result from earlier in this thread:

My voltage for that max speed was 1.285v for reference

 

[Soulkeeper]

Impressive, thank you!

looking at the notes for the "winner" makes me oddly content

 

[Silverforce11]

Nearly 1.2ghz average, with some stock vcore included. Minus those, would be safe to say 1.2ghz average with vcore mods.

 

[kmoros1989]

Hey guys, I'm new to the whole OC'ing on GPUs thing and had some questions. The first is simple, is Diamond a good brand? I got a Diamond Radeon 7850 from Fry's, it was about $10 more than the other Gigabyte one they had but came with a 5 year limited warranty. This card: http://www.newegg.com/Product/Produc...82E16814103207

After toying with Kombustor and Unigine on loop for a bit, it seems I can have it be stable at 1000Mhz/1300Mhz. I now have it set at 1000/1250, because I don't really miss that 50mhz memory clock in framerates and the temps seem to be just a tad lower. This is all on stock volts, too scared to try messing with those. (I'm going with moderate OC here, not extreme. Don't wanna RMA anything)

I played Metro 2033 for three hours the other day without issue. The problem I'm having is BF3. Occasionally, it causes BSOD. It did this even after an hour of a small OC of 925/1240mhz. I haven't gotten a BSOD on any game other than BF3. (Metro, WoW, SWToR, Skyrim)

Finally, my max temp hits as high as 73 celsius during the day, 65 at night. (Hot Summer) Is that a safe range?

TL;DR

1. IS Diamond an ok brand and safe on the OC I've done, or should I return to stock? (I get OC'ing always has its risks, and if this makes the card have a lifespan of 3 years instead of four, I can live with that, I'd upgrade by then anyway.)

2. What is up with BF3? Is it exposing some stability issue with this OC that heaven, metro, and others don't?

3. Is highest temp hitting 73 degrees safe, or should I clock it back down?

 

[Don Karnage]

Hey guys, I'm new to the whole OC'ing on GPUs thing and had some questions. The first is simple, is Diamond a good brand? I got a Diamond Radeon 7850 from Fry's, it was about $10 more than the other Gigabyte one they had but came with a 5 year limited warranty. This card: http://www.newegg.com/Product/Produc...82E16814103207

After toying with Kombustor and Unigine on loop for a bit, it seems I can have it be stable at 1000Mhz/1300Mhz. I now have it set at 1000/1250, because I don't really miss that 50mhz memory clock in framerates and the temps seem to be just a tad lower. This is all on stock volts, too scared to try messing with those. (I'm going with moderate OC here, not extreme. Don't wanna RMA anything)

I played Metro 2033 for three hours the other day without issue. The problem I'm having is BF3. Occasionally, it causes BSOD. It did this even after an hour of a small OC of 925/1240mhz. I haven't gotten a BSOD on any game other than BF3. (Metro, WoW, SWToR, Skyrim)

Finally, my max temp hits as high as 73 celsius during the day, 65 at night. (Hot Summer) Is that a safe range?

TL;DR

1. IS Diamond an ok brand and safe on the OC I've done, or should I return to stock? (I get OC'ing always has its risks, and if this makes the card have a lifespan of 3 years instead of four, I can live with that, I'd upgrade by then anyway.)

2. What is up with BF3? Is it exposing some stability issue with this OC that heaven, metro, and others don't?

3. Is highest temp hitting 73 degrees safe, or should I clock it back down?

Bf3 finds any hint of instability and exposes it. What are you using to overclock? Use sapphire trixx for the most stable overclocks. Lastly that's a reference cooler on the diamond and is the worst for overcloxking.

 

[kmoros1989]

Bf3 finds any hint of instability and exposes it. What are you using to overclock? Use sapphire trixx for the most stable overclocks. Lastly that's a reference cooler on the diamond and is the worst for overcloxking.

Ah my bad should have included more details.

I am using Afterburner. So I shouldn't OC at all on a reference cooler? Even though my max temps are in range of others? (Ya I hit 73 once when the room is hot, but people on here say they reach 71 a lot)

I'm running a 700w PSU, 8gb of Corsair Ram, and an AMD Phenom @ X6 1055t OC'd to 3.5 ghz. (From stock 2.8) The CPU OC is stable according to LinX, and hasn't caused a BS before Videocard upgrade.

Thanks for the help!

 

[Soulkeeper]

Hey guys, I'm new to the whole OC'ing on GPUs thing and had some questions. The first is simple, is Diamond a good brand? I got a Diamond Radeon 7850 from Fry's, it was about $10 more than the other Gigabyte one they had but came with a 5 year limited warranty. This card: http://www.newegg.com/Product/Produc...82E16814103207

After toying with Kombustor and Unigine on loop for a bit, it seems I can have it be stable at 1000Mhz/1300Mhz. I now have it set at 1000/1250, because I don't really miss that 50mhz memory clock in framerates and the temps seem to be just a tad lower. This is all on stock volts, too scared to try messing with those. (I'm going with moderate OC here, not extreme. Don't wanna RMA anything)

I played Metro 2033 for three hours the other day without issue. The problem I'm having is BF3. Occasionally, it causes BSOD. It did this even after an hour of a small OC of 925/1240mhz. I haven't gotten a BSOD on any game other than BF3. (Metro, WoW, SWToR, Skyrim)

Finally, my max temp hits as high as 73 celsius during the day, 65 at night. (Hot Summer) Is that a safe range?

TL;DR

1. IS Diamond an ok brand and safe on the OC I've done, or should I return to stock? (I get OC'ing always has its risks, and if this makes the card have a lifespan of 3 years instead of four, I can live with that, I'd upgrade by then anyway.)

2. What is up with BF3? Is it exposing some stability issue with this OC that heaven, metro, and others don't?

3. Is highest temp hitting 73 degrees safe, or should I clock it back down?

The diamond card is a no frills vanilla card
The Cooler isn't very good and doesn't dissipate much heat, I realized this the day I got the card (also from fry's because it was local and fast) and ended up getting an aftermarket cooler. I really can't recommend overclocking it without very healthy case airflow, and even then your temps will be uncomfortably high.
I wouldn't worry about overclocking the memory so much, 1250 is the highest stable I was able to get on it. Also I needed to bump the gpu voltage up a bit to get stable at above 1GHz (1.185v). 1.225v is the highest the card/drivers will allow which is not a dangerous voltage assuming you have good cooling.

I'd suggest gaming with everything at stock for a day or two, if it continues to crash then you know it's not your oc and possibly a defective card or a driver/os issue.

 

[Don Karnage]

Ah my bad should have included more details.

I am using Afterburner. So I shouldn't OC at all on a reference cooler? Even though my max temps are in range of others? (Ya I hit 73 once when the room is hot, but people on here say they reach 71 a lot)

I'm running a 700w PSU, 8gb of Corsair Ram, and an AMD Phenom @ X6 1055t OC'd to 3.5 ghz. (From stock 2.8) The CPU OC is stable according to LinX, and hasn't caused a BS before Videocard upgrade.

Thanks for the help!

You can overclock just keep it under 80C in games

 

[kmoros1989]

You can overclock just keep it under 80C in games

Hmm ya and it is tempting, as those 4-5 extra frames per second help a lot on occasion. I just ran heaven on max settings on 1920x1080p (my screen resolution) and after about 3 loops on stock clocks it was 66 degrees. Did the same for 1000/1250mhz and it was 69 degrees. That doesn't seem terribly high, although I am comparing to my old XFX 5770 which hit up to 80 degrees under load (I never OC'd that one). Maybe 70 degrees or so is high on the 7850s?

I don't know, if it is such a risk I will leave it at stock clock speed, it is still an awesome card and a huge improvement over the aformentioned 5770. Or maybe I should chase a happy medium, maybe a more moderate OC of like 950/1225?

But if there is any more than normal risk because of the reference fan, I guess I shouldn't take chances. Oh and on the subject of fans, mine is set to auto, and I've never seen it go over 53% speed.

Any more advice is appreciated, sorry I talk so much

 

[MisterMac]

Hmm ya and it is tempting, as those 4-5 extra frames per second help a lot on occasion. I just ran heaven on max settings on 1920x1080p (my screen resolution) and after about 3 loops on stock clocks it was 66 degrees. Did the same for 1000/1250mhz and it was 69 degrees. That doesn't seem terribly high, although I am comparing to my old XFX 5770 which hit up to 80 degrees under load (I never OC'd that one). Maybe 70 degrees or so is high on the 7850s?

I don't know, if it is such a risk I will leave it at stock clock speed, it is still an awesome card and a huge improvement over the aformentioned 5770. Or maybe I should chase a happy medium, maybe a more moderate OC of like 950/1225?

But if there is any more than normal risk because of the reference fan, I guess I shouldn't take chances. Oh and on the subject of fans, mine is set to auto, and I've never seen it go over 53% speed.

Any more advice is appreciated, sorry I talk so much

BSOD = CPU OC.
Not GPU.

Atleast with my experience (Do correct me).
Try lowering your CPU oc - or add more volt to cpu and retry with 1000 core.

...and as said use trixx!


Also pike:
My 1250 Core was 1225 mV max for non asus bios.

And it's not gaming stable - Have to lower it to 1220 for D3\Skyrim\Etc.

 

[kmoros1989]

BSOD = CPU OC.
Not GPU.

Atleast with my experience (Do correct me).
Try lowering your CPU oc - or add more volt to cpu and retry with 1000 core.

...and as said use trixx!


Also pike:
My 1250 Core was 1225 mV max for non asus bios.

And it's not gaming stable - Have to lower it to 1220 for D3\Skyrim\Etc.

Well, I will look into it but I doubt it. My cpu does have extra volts, I have it at around 1.375 from stock 1.325, which should be more than enough for going from 2.8 to 3.5ghz. (I've heard of people doing this with the 1055t on stock volts in fact, wouldn't work for me so I gave it a bit more juice)

And like I said, did a couple LinX tests on it to make sure it was stable, and it made it through. Also did memtest for my memory. I don't know, maybe BF3 is exposing a problem with stability other games/benches aren't.

 

[MisterMac]

Well, I will look into it but I doubt it. My cpu does have extra volts, I have it at around 1.375 from stock 1.325, which should be more than enough for going from 2.8 to 3.5ghz. (I've heard of people doing this with the 1055t on stock volts in fact, wouldn't work for me so I gave it a bit more juice)

And like I said, did a couple LinX tests on it to make sure it was stable, and it made it through. Also did memtest for my memory. I don't know, maybe BF3 is exposing a problem with stability other games/benches aren't.

My experience is CPU Heavy Games (SC2, BF3 amongst others) - tend to flex instruction decoders and schedulers in a way LINX\Prime95 never does with it's more or less straight forward use of algorhythms over and over.
It allows the Cache to be used more and less flushes occur in the pipeline.

Hence why linx maybe stable at Y Clock with X volt.
But if that X volt is extremely close to Y clocks minimum roughly required wattage CPU heavy games sometimes go just a bit beyond and cause the crash.

What BSOD are you getting error code? and error message?

 

[kmoros1989]

My experience is CPU Heavy Games (SC2, BF3 amongst others) - tend to flex instruction decoders and schedulers in a way LINX\Prime95 never does with it's more or less straight forward use of algorhythms over and over.
It allows the Cache to be used more and less flushes occur in the pipeline.

Hence why linx maybe stable at Y Clock with X volt.
But if that X volt is extremely close to Y clocks minimum roughly required wattage CPU heavy games sometimes go just a bit beyond and cause the crash.

What BSOD are you getting error code? and error message?

Crud I was stupid and haven't written it down, but I remember it mentioning display drivers, and I'm pretty sure it was this one or one VERY similar to it:

http://www.google.com/imgres?q=vari...00&start=18&ndsp=24&ved=1t:429,r:6,s:18,i:152

 

[nFeF]

Bumped my stock Asus up to 1100/1375 @ 1.138v with TriXX and ran 3dMark11 twice without no crashes or errors. Temp never went above 55c with custom fan setting.

Stock ASIC was 75%~ so I didn't expect it to one-shot work but.. no problems. Correct me if i'm wrong but running at 1680x1050 resolution would the performance gains even be worth pushing higher from here, say 1200? Doesn't seem like it would be.

 

[Bryson777]

That's a nice overclock for stock volts. Running 1125/1375 @ 1.185 atm and slowly bringing my clocks and volts down as I am being bottlenecked by my Q6600 at high clocks anyways. Nice to know I have that extra margin when I do upgrade my cpu eventually.

I find that 3dmark doesn't do a very good job at stressing the GPU. Why not run Heaven at the resolution and and clocks that you want and see for yourself if there's any improvement or if the extra volts is worth it.

 

[silvscorp]

May be little off topic. I am about buying a HD7850 today but not sure which one to get: MSI Twin Frozr or Asus DCII, if price is not a factor, which one is better in terms of OC and noise level.

I only need to decide between these two brand cars for the moment.

 

[Bryson777]

I'd say the asus. The cooler is way oversized for this ship measuring in at 10.2". just barely fit in my case.