The Radeon 7850 is an overclocking beast

[Soulkeeper]

In computer terms the acronym is often used to mean:
ASIC = application-specific integrated circuit
As it relates to vid cards the "application" being discrete or integrated.

It's completely odd that "what's your asic?" is being coined here.
Sounds more like some random program generating a random number and calling it "asic" falsely.

Or more likely a program misinterpretation of the ADL_SDK return values.
ie: printing the concatenation of the two bitfields as a decimal, instead of actually interpretting them

I could be wrong on this, i'm not even sure which app you are running to generate these "asic" numbers.

 

[MisterMac]

In computer terms the acronym is often used to mean:
ASIC = application-specific integrated circuit
As it relates to vid cards the "application" being discrete or integrated.

It's completely odd that "what's your asic?" is being coined here.
Sounds more like some random program generating a random number and calling it "asic" falsely.

Or more likely a program misinterpretation of the ADL_SDK return values.
ie: printing the concatenation of the two bitfields as a decimal, instead of actually interpretting them

I could be wrong on this, i'm not even sure which app you are running to generate these "asic" numbers.

So why don't you research it, instead of cry and whine about how it "MIGHT" not be accurate?


Everyone knows it's not a ultimate measurement, but is nonetheless taken from reading NVidia & AMD's OWN way of classifying this data.

Useless post, is useless.



To the people having trouble ocing, do it by steps.
GPU ONLY FIRST.
Use trixx, +20% board limit and test increments of 25mhz of heaven\occt\furmark runs.

Personally had issues with GPU Tweak even tho it's a sexy feature loving little pack... it's not good for stability testing

 

[Kastor Krieg]

What's curious for me is how the lower ASIC is supposed to be worse on air, but BETTER for OC on water / dice / LN2 :\

 

[MisterMac]

What's curious for me is how the lower ASIC is supposed to be worse on air, but BETTER for OC on water / dice / LN2 :\

I saw an explanation on another forum very detailed, but can't for life of me remember the thread.


The argument was with exotic \ full block cooling - the cooling would cause a fixed line on temps all over.

Now if you have a super high Q asic chip - the core itself would be much better at keeping current closed and not leaking - thus causing big temp gaps between vrms\memory and core.
Which over heavy OC use - would cause instability.





Altho looking at that argument now - doesn't really make sense with me.
Better dig up that thread... i remember it having very compelling arguments.

 

[Vesku]

I think it's more to do with higher quality ASIC having less voltage leakage. Not much of a problem when air cooling since your fencing with the max heat dissipation of the cooler before really cranking up the voltage. In fact being power efficient is a good thing when you are near max heat to start with.

However, with more exotic cooling you have much more headroom on the voltage side and as you increase it the lower quality ASIC that is leaky handles it better (although power use curves upwards).

 

[Soulkeeper]

So why don't you research it, instead of cry and whine about how it "MIGHT" not be accurate?


Everyone knows it's not a ultimate measurement, but is nonetheless taken from reading NVidia & AMD's OWN way of classifying this data.

Useless post, is useless.



To the people having trouble ocing, do it by steps.
GPU ONLY FIRST.
Use trixx, +20% board limit and test increments of 25mhz of heaven\occt\furmark runs.

Personally had issues with GPU Tweak even tho it's a sexy feature loving little pack... it's not good for stability testing

"cry and whine" ?
That's uncalled for. I was trying to have an intelligent conversation, which is lost on you. Apparently i'm looking in the wrong place.

 

[Dark Shroud]

Also running Antec Neo HE 430w and a q6600@3.0ghz

What do you guys suggest? Should I stick with max OC at stock voltage or try to hit max OC?

I would suggest getting a better PSU if you want to run both an over clocked CPU & GPU at the same time. As someone who has had PSUs burn out on him you don't want to deal with that pain.

With that CPU I would suggest a Corsair 600w that don't cost too much.

This one is on sale with a rebate and coupon code. http://www.newegg.com/Product/Produc...82E16817139028

 

[Kastor Krieg]

Sigh. And here's how I'm faring with my new ASUS DCU2 7850
http://forums.anandtech.com/showthread.php?t=2251415

 

[Kastor Krieg]

Sigh. And here's how I'm faring with my new ASUS DCU2 7850
http://forums.anandtech.com/showthread.php?t=2251415

Issue solved, off to overclock country! I don't expect wonders though, ASIC 75.4% only :|

First question arose pretty fast. After I unlocked voltage control and the GPU Core range in the ASUS GPU Tool, it started looking like this:

Is my ASUS DCU2 volted at 1.138v and does not go below that?

 

[AlucardX]

Issue solved, off to overclock country! I don't expect wonders though, ASIC 75.4% only :|

First question arose pretty fast. After I unlocked voltage control and the GPU Core range in the ASUS GPU Tool, it started looking like this:

Is my ASUS DCU2 volted at 1.138v and does not go below that?

1. Click the lock icon to "unlock" the two sliders, so you can set them independently.
2. This is your default vcore for 3D, so that's normal. this is not your 2d / idle vcore.
3. Begin overclocking. I would raise the GPU clock to 1100 and go from there. You'll probably need to increase your vcore to around 1.200.
4. If you can't get your vcore high enough, use GPU Tweak 2.0.6.0.

 

[Don Karnage]

Issue solved, off to overclock country! I don't expect wonders though, ASIC 75.4% only :|

First question arose pretty fast. After I unlocked voltage control and the GPU Core range in the ASUS GPU Tool, it started looking like this:

Is my ASUS DCU2 volted at 1.138v and does not go below that?

See the little lock to the left of voltage control? Make sure thats unlocked so you can set voltage manually. Next Set core speed to 1100, memory to 5500, click apply and run 3dmark11. My card could do 1100 core on 1.138v so lets see if yours could too.

Also make yourself a custom fan profile.

These were my settings for various speeds

1200 Core, 1400 mem - Crash GT2 @ 1.160v
1200 Core, 1400 Mem - Crash GT2 @ 1.170v
1200 Core, 1400 Mem - Pass - 7120 in 11 @ 1.180v
1200 Core, 1500 Mem - Pass - 7249 in 11 @ 1.180v
1200 Core, 1525 Mem - Pass - 7288 in 11 @ 1.180v
1200 Core, 1530 Mem - Pass - 7297 in 11 @ 1.180v
1200 Core, 1535 Mem - Pass - 7295 in 11 @ 1.180v - Memory Maxed

1225 Core, 1530 mem - Crash GT2 @ 1.180v
1225 Core, 1530 mem - Crash GT2 @ 1.190v
1225 Core, 1530 Mem - Crash GT2 @ 1.200v
1225 Core, 1530 Mem - Pass - 7363 in 11 @ 1.200v
1250 Core, 1525 Mem - Crash GT2 @ 1.220v
1250 Core, 1525 Mem - Crash GT2 @ 1.225v
1250 Core, 1525 Mem - Pass - 7469 in 11 @ 1.230v
1260 Core, 1525 Mem - Pass - 7508 in 11 @ 1.230v
1270 Core, 1525 Mem - Crash GT2 - 1.230v
1270 Core, 1525 Mem - Crash GT2 - 1.240v
1270 Core, 1525 Mem - Crash GT2 - 1.250v
1270 Core, 1525 mem - Pass - 7543 in 11 @ 1.260v
1280 Core, 1525 Mem - Pass - 7570 in 11 @ 1.260v
1290 Core, 1525 Mem - Crash GT3 @ 1.260v
1290 Core, 1525 Mem - Pass - 7616 in 11 @ 1.270v
1295 Core, 1535 Mem - Crash - GT2 - 1.270m
1300 Core, 1525 Mem - Crash - GT2 - 1.270m
1300 Core, 1525 Mem - Pass - 7644 In 11 @ 1.280v
1310 Core, 1525 Mem - Pass - 7682 in 11 @ 1.280v

 

[RaistlinZ]

See the little lock to the left of voltage control? Make sure thats unlocked so you can set voltage manually. Next Set core speed to 1100, memory to 5500, click apply and run 3dmark11. My card could do 1100 core on 1.138v so lets see if yours could too.

Also make yourself a custom fan profile.

These were my settings for various speeds

1200 Core, 1400 mem - Crash GT2 @ 1.160v
1200 Core, 1400 Mem - Crash GT2 @ 1.170v
1200 Core, 1400 Mem - Pass - 7120 in 11 @ 1.180v
1200 Core, 1500 Mem - Pass - 7249 in 11 @ 1.180v
1200 Core, 1525 Mem - Pass - 7288 in 11 @ 1.180v
1200 Core, 1530 Mem - Pass - 7297 in 11 @ 1.180v
1200 Core, 1535 Mem - Pass - 7295 in 11 @ 1.180v - Memory Maxed

1225 Core, 1530 mem - Crash GT2 @ 1.180v
1225 Core, 1530 mem - Crash GT2 @ 1.190v
1225 Core, 1530 Mem - Crash GT2 @ 1.200v
1225 Core, 1530 Mem - Pass - 7363 in 11 @ 1.200v
1250 Core, 1525 Mem - Crash GT2 @ 1.220v
1250 Core, 1525 Mem - Crash GT2 @ 1.225v
1250 Core, 1525 Mem - Pass - 7469 in 11 @ 1.230v
1260 Core, 1525 Mem - Pass - 7508 in 11 @ 1.230v
1270 Core, 1525 Mem - Crash GT2 - 1.230v
1270 Core, 1525 Mem - Crash GT2 - 1.240v
1270 Core, 1525 Mem - Crash GT2 - 1.250v
1270 Core, 1525 mem - Pass - 7543 in 11 @ 1.260v
1280 Core, 1525 Mem - Pass - 7570 in 11 @ 1.260v
1290 Core, 1525 Mem - Crash GT3 @ 1.260v
1290 Core, 1525 Mem - Pass - 7616 in 11 @ 1.270v
1295 Core, 1535 Mem - Crash - GT2 - 1.270m
1300 Core, 1525 Mem - Crash - GT2 - 1.270m
1300 Core, 1525 Mem - Pass - 7644 In 11 @ 1.280v
1310 Core, 1525 Mem - Pass - 7682 in 11 @ 1.280v

Is the in-game performance difference even noticeable and worth the extra voltage required for 1310 core over 1225 core?

 

[Don Karnage]

Is the in-game performance difference even noticeable and worth the extra voltage required for 1310 core over 1225 core?

I could run ultra settings in BF3 at stock clocks but 1300 core really was just for benching. I ran 1200 core, 5600 mem for everyday gaming

 

[Kastor Krieg]

OK!

LOL, wut :|

 

[Don Karnage]

OK!

LOL, wut :|

You crashed. No big deal. What were max temps during the run? Try 1000 core

 

[RigRebel]

Correct. The only difference is the higher voltage range, and that stock are higher. Overclocks will not improve for any given voltage, and 1.3v is only worth using if you have GOOD cooling.

555BUK you're a God send and HELP

I have the Diamond 7850pe52g and it appears to be your cards identical twin in almost every way. The problem I'm having with my card though is that the factory heatsink looks like it was machined by a blind man whom left his thumb print on it... I mean this thing is ROUGH!
take a look > http://www.techpowerup.com/forums/showthread.php?t=167140

I'm thinking of lapping it this weekend or even going to the ACC TT II like you have.
Questions: 1. Does the ACC TT II still allow room for a second card in xFire configuration ? Essentially is the card too tall for xfire ?
2. Does the shroud get in the way of the xfire flexible bridge ? Can the shroud be removed without removing the fans ?
3. Was the heatsink rough as heck on yours ?
4. Any number on total W pulled by the card with the ACC TT II ?

PS great posts on here and new egg. I just found you so I'll read up, didn't have a chance to read all the posts yet so forgive me if I'm asking redundant questions.

 

[Kastor Krieg]

You crashed. No big deal. What were max temps during the run? Try 1000 core

Thing is, I didn't. Or I did straight away from the start. Temps were @~30C, it runs very cool in idle. Let me re-check on stocks.

 

[Arzachel]

Another thing: Set powertune to +20% in CCC to avoid problems with the card throttling.

 

[Don Karnage]

Download trixx and overclock via that instead of gpu tweak

 

[Kastor Krieg]

OK, thanks, the sliders in ATI GPU Tool were annoying the living heck outta me. Trixx does not have a voltage slider though?

Anyway, 3DMark 11 crashes on start, defaults or not. Just does not run. I cleaned it out and reinstalled, no go. Unigine Heaven works like a charm. WTH? :\

 

[Don Karnage]

OK, thanks, the sliders in ATI GPU Tool were annoying the living heck outta me. Trixx does not have a voltage slider though?

Anyway, 3DMark 11 crashes on start, defaults or not. Just does not run. I cleaned it out and reinstalled, no go. Unigine Heaven works like a charm. WTH? :\

Probably just a driver conflict

 

[Kastor Krieg]

Could be my being on 12.6 Beta, bleh. I'll stick to Heaven until proper 12.6 comes out.

 

[Don Karnage]

Could be my being on 12.6 Beta, bleh. I'll stick to Heaven until proper 12.6 comes out.

Good plan. Heaven is more stressful anyway

 

[Kastor Krieg]

What about voltage control in Trixx? I hate having to overlap GPU Tool and Trixx, they override each others' clocks sometimes >.>

 

[Don Karnage]

What about voltage control in Trixx? I hate having to overlap GPU Tool and Trixx, they override each others' clocks sometimes >.>

Cant have both of them open at the same time and you should have v control in trixx. Look in the settings