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Questions about Bulldozer.

post #1 of 11
Thread Starter 
Hey everyone, I've just got a few questions about Bulldozer in general.....

1. What is the "safe voltage" that everyone is using? It seems that people are fine with going up to 1.4-1.5V on a 32nm process. I know Intel and AMD are not the same, but is there anything about these chips that make them able to handle such high voltage and be fine, or do people just not care?

2. Has anyone disabled specific "cores" or parts of their modules to achieve higher single threaded performance? I've read about this and it basically allows better single threaded performance compared to multi-threaded performance (I say this because I do not believe it actually increases IPC, just the threaded performance).

3. Does anyone have any SC2 benchmarks for Bulldozer processors that are overclocked? I keep finding ones for stock Bulldozer.

Responses from the 4 and 8 core owners would be most appreciated as these are the two options I may be interested in. I am well aware of all of the controversy/debate of Intel vs AMD Bulldozer vs AMD Older Generation, and would like to say I'm just interested in a new platform.
post #2 of 11
I would wait until the revision
currently it is a solid chip, but to me a, an 1100t would be a better overall chip

from what i have researched, benchmarks for the 8150 show that disabling 4 cores shows much better performance

there are still problems in the chip itself AND the software governing it.

i know you wanted your questions answered but i feel as though this may help you more
post #3 of 11
Thread Starter 
Yeah thanks for taking the time to answer this post. I am well aware of all of those problems, but I just want to try out a new platform, hence why I'm willing to even just buy a cheap FX4100 and wait until the revision (which will hopefully be on AM3+ still)
post #4 of 11
yea i hear....i'd have the 8150 right now if i didn't blow all my dough on a gtx 580 biggrin.gif

i'd love to get my hands on this thing and mess around with it
post #5 of 11
I don't think there's a concencus on max safe voltage, the only figure I've seen thrown around is 1.45v for 24/7 usage is probably where you should stop. At this voltage it's possible to push them to 4.6-4.8GHz, maybe even 5GHz depending on luck of the draw.

If you disable 1 core per module threaded performance improves, there was an article on it posted here a little while ago and it did show this, I don't have a link for you.

As for the problems with the chip, alot have been fixed within the past week or two with bios updates. The BSOD issues have been resolved and the very same bios update that fixed that made it feel alot snappier than it was. I'm not sure what's going on with other mobo's, I only speak for whats happened with the Crosshair V. ASUS are releasing beta bios updates pretty frequently fixing things. Overall it's a much better experience than it was previously.
Edited by Tslm - 11/28/11 at 9:23am
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post #6 of 11
I never actually got a BSOD on BD. It would either throw "Illegal SUMOUT" errors in Prime95, or just completely restart.
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post #7 of 11
Quote:
Originally Posted by axipher View Post

I never actually got a BSOD on BD. It would either throw "Illegal SUMOUT" errors in Prime95, or just completely restart.

It was only in certain Steam games as far as I know. But yeah it got fixed.
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post #8 of 11
Quote:
Originally Posted by Tslm View Post

I don't think there's a concencus on max safe voltage, the only figure I've seen thrown around is 1.45v for 24/7 usage is probably where you should stop. At this voltage it's possible to push them to 4.6-4.8GHz, maybe even 5GHz depending on luck of the draw.
If you disable 1 core per module threaded performance improves, there was an article on it posted here a little while ago and it did show this, I don't have a link for you.
As for the problems with the chip, alot have been fixed within the past week or two with bios updates. The BSOD issues have been resolved and the very same bios update that fixed that made it feel alot snappier than it was. I'm not sure what's going on with other mobo's, I only speak for whats happened with the Crosshair V. ASUS are releasing beta bios updates pretty frequently fixing things. Overall it's a much better experience than it was previously.

Is there anything to "fix" the power usage problems? The numbers looked pretty high the last time I saw charts so I was hopping things changed.
     
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post #9 of 11
Quote:
Originally Posted by Rookie1337 View Post

Quote:
Originally Posted by Tslm View Post

I don't think there's a concencus on max safe voltage, the only figure I've seen thrown around is 1.45v for 24/7 usage is probably where you should stop. At this voltage it's possible to push them to 4.6-4.8GHz, maybe even 5GHz depending on luck of the draw.
If you disable 1 core per module threaded performance improves, there was an article on it posted here a little while ago and it did show this, I don't have a link for you.
As for the problems with the chip, alot have been fixed within the past week or two with bios updates. The BSOD issues have been resolved and the very same bios update that fixed that made it feel alot snappier than it was. I'm not sure what's going on with other mobo's, I only speak for whats happened with the Crosshair V. ASUS are releasing beta bios updates pretty frequently fixing things. Overall it's a much better experience than it was previously.

Is there anything to "fix" the power usage problems? The numbers looked pretty high the last time I saw charts so I was hopping things changed.

Not that I know of. I think that's probably got to do with Global Foundries' pretty immature 32nm process. I don't think power consumption really skyrockets until you start upping the voltage though. You can get to a bit over 4GHz without changing it. At stock it's pretty similar to Gulftown.
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post #10 of 11
It doesnt use that much power.
http://www.overclock.net/t/1126863/real-world-power-usage-user-submitted-values/90#post_15787729

Look at the above post of the 1100t
It only uses 4W more.
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