Thursday, April 23rd 2020

AMD FX-8350 Pushed to 8.1 GHz via Extreme Overclocking by Der8auer

AMD's Bulldozer architecture is a well-known quantity by now, and seemingly straddles a line between loathing and love between tech enthusiasts. Slow and power hungry compared to Intel's options, it harkens back to a time where the roles were reversed, and AMD were looking to compensate for architectural deficiencies (and architectural design decisions that can either be claimed as erroneous or ahead of their time) via increased clockspeeds. However you look at these Bulldozer CPUs, the fact is that they remain some of the best overclockers of all time - at least when it comes to maximum operating frequencies, especially at absolutely scorching vCore values.

To achieve that operating frequency, Der8auer used an Elmor EVC2 controller and diagnostics chip, which, connected to a usually unpopulated pin area in the ASUS 970 PRO GAMING/AURA motherboard, allowed him to read-out everything that was running through the motherboard's VRM circuitry, and perform manual adjustments. Corsair Vengeance 2,666 MHz DDR3 memory was also used in the system. An accident happened along the way, though: when pulling AMD's stock cooler from the motherboard, the CPU remained attached to the cooler, which resulted in some bent pins (screams in horror). Luckily, things were fixed with a screwdriver - let that serve as a warning, alert, and tip, should this happen to you.
Anyway, the AMD FX-8350 achieved an 8,127 MHz speed with a 1,920 vCore, which is an absolutely incredible voltage for a 32 nm CPU. Running at 7,500 MHz for a single-core performance benchmark, the CPU was pulling 100 W of power - for a single core to operate at that speed, mind you. Even so, the AMD FX-8350 only achieved a single-core score of 172 points - for comparison sake, AMD's six-core Ryzen 5 2600X, running at stock clocks of 3.6 GHz with all cores enabled, achieves 176 points in the same benchmark. Watch the video below for the full rundown on this experiment.

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64 Comments on AMD FX-8350 Pushed to 8.1 GHz via Extreme Overclocking by Der8auer

#4
rutra80
As soon as I'm back home I'm gonna try how much better my anniversary pentium overclocks if I bend its pins :rockout:
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#6
nemesis.ie
Rather than using a screwdriver for bent pins, I've found the barrel of certain pens/propelling pencils (i.e. a very small tube/metal straw) placed over the pin alows the force to be applied more evenly and not risk damaging adjacent pins.

Thankfully I've not had this issue for many, many years. :)
Posted on Reply
#7
E-curbi
TheLostSwede
Slow news day?
Der8auer hasn't had anything to do in a long time. lol :p

Wants his channel to be just like Jayz and Linus'. $$$$

"But I'm NOT an entertainer, I'm only an engineer" :)
Posted on Reply
#8
dj-electric
E-curbi
Der8auer hasn't had anything to do in a long time. lol :p
He can start probing the insane 1440A capable V... wait, im not suppose to talk about this one. Yet.
Posted on Reply
#9
cyberloner
what? my cpu is still king of all times... xD
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#10
Berfs1
dang it needs to be at 8 GHz to get almost double the perf of Ryzen.... nice
Posted on Reply
#11
Alduin
I want a 14nm fx cpu
I wonder how much Voltage can 14 nm take
Posted on Reply
#12
xman2007
Berfs1
dang it needs to be at 8 GHz to get almost double the perf of Ryzen.... nice
The same performance 172 vs 176 on the ryzen, so you'd need 16ghz and a nuclear power plant to double the performance on a ryzen chip with bulldozer :laugh:
Posted on Reply
#13
phanbuey
to be on par with a 2600x...

AMD has come a long way lol.
Posted on Reply
#14
EarthDog
lol, 8Ghz on a potato from 2011...Who cares...!

This was done shortly after release and isn't even the fastest! Why is this news?
Berfs1
dang it needs to be at 8 GHz to get almost the perf of Ryzen.... nice
FTFY
Posted on Reply
#15
Assimilator
nemesis.ie
Rather than using a screwdriver for bent pins, I've found the barrel of certain pens/propelling pencils (i.e. a very small tube/metal straw) placed over the pin alows the force to be applied more evenly and not risk damaging adjacent pins.

Thankfully I've not had this issue for many, many years. :)
Far preferable to trying to fix an LGA socket **shudders at repressed memories**
Posted on Reply
#16
Chloe Price
Usually I don't care about extreme OC, but der8auer seems a hella nice dude and I like his videos and other content, nice to see something like this from him.
Posted on Reply
#17
seronx
Alduin
I want a 14nm fx cpu
I wonder how much Voltage can 14 nm take
Not a lot, the better transistor is going to be with 12FDX.

LVT => Not a lot of voltage scaling potential.
RVT => A lot of voltage scaling potential.
HVT => Not meant for voltage scaling but leakage control and etc.



Bulldozer/Steamroller should have lower frequency per voltage step but more voltage steps that are worthwhile. While, Zen should have intrinsically higher frequency per voltage step but less voltage steps that are worthwhile.

12FDX retains voltage range from PDSOI/Bulk. Improves LVT scaling at high frequency and high voltage from 28nm. It adds and retains worthwhile modulation knobs; channel length(long length vs wimpy gates like Zen which add mask count and process steps), as well as body-biasing with forward(reduces Vt)/reverse(increases Vt) diodes, etc.

Do to Family 15h physical design, if it is a ported design, then it will probably want to target 12FDX for the 14nm/12nm node.

Family 17h(Zen) is physically built more like Family 16h(Jaguar);


Which means it can scale with higher performance transistors. While Bulldozer/Steamroller-like physical designs won't scale well on such nodes.
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#18
xtreemchaos
i love the FXs, there like a old mussel car, gets hot n lowd but would never win a f1 race but boy do thay sound nice. you have to hand it to the guy hes made that 8350 sing for its supper, well done No 8.
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#19
slehmann
AFAIK the higher records were achieved using helium instead of liquid nitrogen - therefore this one stands for its own.
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#21
Chloe Price
xtreemchaos
i love the FXs, there like a old mussel car, gets hot n lowd but would never win a f1 race but boy do thay sound nice. you have to hand it to the guy hes made that 8350 sing for its supper, well done No 8.
I've been saying this since 2011, but that's the AMD equilent of Pentium 4. :D
Posted on Reply
#22
xtreemchaos
agreed, i think history will be kind to the FXs with them being high overclocking on ln2 ect and i dont think we would be where we are with Zen without them and A"s being a forerunners. ill never let my 8350 go..
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#23
EarthDog
xtreemchaos
agreed, i think history will be kind to the FXs with them being high overclocking on ln2 ect and i dont think we would be where we are with Zen without them and A"s being a forerunners. ill never let my 8350 go..
For who though? Look at how TPU, an 'enthusiast' site, normally reacts to LN2 records. Nobody cares and they are blown off at best... hated on at worst (this is the most civil I've seen in 11 years, lol).

For those few who know and care... I agree. While they were shit for daily use compared to Intel (and like 3 preior generations, lol), they hit the track like no other!!!
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#24
xtreemchaos
the funny thing is a lot of folk are neg about them and thay have never try one, i used to play VR with mine untill i got my 2700x and it got by fine given low with a few mid settings and id get 700 in cb15 with a 4.8 overclock but everybodys entitled to there opinon :).
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#25
seronx
Chloe Price
I've been saying this since 2011, but that's the AMD equilent of Pentium 4. :D
I wouldn't say that, just because it has higher clocks doesn't mean it is built in the same way.

A lot of stuff in Bulldozer lost what it was initially based on. It was a beefy big core when it was only a 32-bit processor w/ units that would only pop eventually in Zen.
32-bit core => patents.google.com/patent/US6240503B1
L1i => 128 KB 2-way associative cache
L0i => 512 byte fully associative cache
L1d => 128 KB 2-way associative cache
{ 2x 32-bit ALUs
2x 32-bit FPUs
2x 32-bit MMXs
1x LD AGU
1x ST AGU ] x2
Shared Scheduler/Retirement => Independent Renamers

Similar core => patents.google.com/patent/US6553482B1
L1i => 256 KB 4-way associative cache
Retirement queue => 128-entries
Shared Retirement/Renamer => Independent Schedulers

Both shared L1d/LSU.
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