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Tuesday, 05 July 2011 09:19

AMD FX-8130P pushed to 5.1GHz on air

Written by Fudzilla staff


Bulldozer in sixth gear
A Czech bloke has managed to get hold of a Bulldozer engineering sample and run it through its paces.

He ran a couple of tests and pushed the 3.8GHz FX-8130P to 5.1GHz, on air and with at a core voltage of 1.524V.

The sample was apparently perfectly stable in SuperPi, while it was downcloked to 4.85GHz in Cinebench.

You can check out the screens here.

 

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Comments  

 
+72 #1 Nerdfighter 2011-07-05 09:32
Very interesting indeed. Bulldozer seems to be able to overclock on par with Sandy. It can reach very high clocks, but the voltages are not suitable for day-to-day use. Wonder if this is the new revision, which got it delayed. Hopefully the retail samples will be even better than this ;-)
 
 
+20 #2 Bl0bb3r 2011-07-05 10:30
Voltages are throttled if the mainboard has a well implemented UEFI, all will be stable. What the air cooling shows is how well SOI is dealing with leakages overall and how well HKMG is dealing with them at the gate. 1.5v might be high, but considering the engineering of the chip, it can be handled.

Not to be a judge, I know it's an engineering sample, but for 5GHz still doing Pi in over 10 sec is not something great. An SB at the same clock does it in 7 sec or so.

In Cinbench, no 4 might be the 12 core Opteron 2435... and the score looks pretty close to that 7.95 of the Opteron. Not bad, but the 2600K at 3.4GHz does an 8.5.

Overall an 8Ci/4Cf Bulldozer might be just as good as a 12 core Stars... that's a really good improvement.
 
 
+33 #3 dan 2011-07-05 10:38
With such a deep pipeline I expect BD to overclock even more, this is just an ES after all.
 
 
+33 #4 leftiszi 2011-07-05 11:19
Guys don't forget that AMD's cpus in general, use a high voltage/low current scheme, in contrast to Intel's chips that use low voltage/high current.

1.5V is normal for high overclocking on Phenom II, in the same repsect that 1.4V is normal for Sandy for 5Ghz, so a voltage of 1.5V thereabouts is not bad for BD.

Now I can only guess that Zambesi will feature the same power scheme.
 
 
+14 #5 JAB Creations 2011-07-05 11:23
Worth waiting an extra month, my X3 720 BE (purchased day 1 on Newegg to replace a socket 939 system) unlocks to an X4 however I can only get a stable 300MHz OC...maybe 340-350 tops and adding voltage doesn't help at all (on all or any individual cores). So for all those complaining about delays be happy that you won't get stuck with a BE or FX CPU with a gimped OC capability.
 
 
+23 #6 ApNw 2011-07-05 11:30
Quoting Bl0bb3r:
But for 5GHz still doing Pi in over 10 sec is not something great. An SB at the same clock does it in 7 sec or so.
Not bad, but the 2600K at 3.4GHz does an 8.5.

We can't know for sure how well Bulldozer is doing (sample, time hidden etc...), and then SB accomplishes 7s on SuperPi at 5.6ghz, not quite the same clock, and can't handle those OC at all, as they drop like flies as soon as the core voltage goes above 1.38v.
Also, samples of the 2600K were doing 9.5s at 4.5Ghz back then.

Let's not be too hasty, it could be worse, it could be better...We just don't know yet.
 
 
+34 #7 muppet show 2011-07-05 11:32
Quoting Bl0bb3r:
doing Pi in over 10 sec is not something great. An SB at the same clock does it in 7 sec or so.

In Cinbench ... the score looks pretty close to that 7.95 of the Opteron. Not bad, but the 2600K at 3.4GHz does an 8.5.

Results don't indicate anything. If you look, the RAM clocks are at 1077Mhz .. that absolutely cripples Zambezi performance. It NEEDS its 1866Mhz default RAM clocks for benchmarking or memory bandwidth intensive tasks. If the results you quote are accurate, then that's absolutely amazing given how constrained the CPU is in this scenario.
Also, this should be taken with a massive pinch of salt as 1) This guy is massively anti-AMD 2) It's an engineering sample 3) He makes no explanation of why he has crippled RAM clocks ...
 
 
-24 #8 Jurassic1024 2011-07-05 11:45
um, more like 2154MHzum, more like 2154MHz
 
 
-19 #9 Marburg_U 2011-07-05 11:49
No, please, STOP QUOTING obrovsky. Quote everything you want but not obrovsky.
 
 
+16 #10 Bl0bb3r 2011-07-05 12:05
Well noted, I haven't given the data a thorough look... also that Opteron, I know 24xx is 6 cores Istanbul, so 12c would be a dual 6c system, not a 12c Magny-Cour's. Nevermind, the author... :-x

@ApNw, I know they're hidden, but 1) SuperPI has always been "optimized" for intel and 2) it's the 1 that sticks out. Also the Cinebench charts are delivered by default with the setup application, the bars can be seen properly 1st two are Xenons, 4th is an Opteron, you just have to connect the dots.
 

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