AMD Athlon II X4 620 L3 unlocked

[Cele303]

Well, X4 620 retail sample with unlocked L3, these chips are really rare ones to find...

And I have one in wrong time, my test ddr3 ram is history so my am3 mobo is out of business right now, cheap am2+ mobo and ddr2 ram are temporary replacement...

So, not optimized benchmarks, win 7 x64 just to see how good chip is untill I buy new ddr3 ram for overclocking...


Some pics:




Hw default info:



Default temperature:



CPU-Z Validation - 4199MHz

http://valid.canardpc.com/show_oc.php?id=840690



SuperPi 1M - 17.284s



Pifast - 28.63s



wprime 32M - 10.062s



Max stress stable



Chip is very nice, mounted on the right mobo and ram it will be bad ass 620, nice cpu and nb freq on air already...

[FlanK3r]

cool!

[Scooter30]

Is this a Deneb core?

[Cele303]

Yes, it is...

Few 2D Benchmarks repeat with DDR3 ram to compare the difference betwean cheap mobo and DDR2 ram and high end mobo and DDR3 ram...

Test setup

Gigabyte 790FXT-UD5P
AMD X4 620 0938APMW
2x2GB Corsair Dominator GT 1866 C7
TT Big Typhoon
Corsair TX 850W

SuperPi 1M - 16.140s



Pifast - 25.66s



wprime 32M - 9.046s



Sandra CPU Arithmetic - 54.34GIPS



Max cpu-z - 4303 MHz

http://valid.canardpc.com/show_oc.php?id=866559


Because of unlocked L3 cache most of this results are 620 first places at hwbot...

[Andi64]

Hi!
I have an Athlon II X4 640, Stepping is CACYC 0938DPMW. Right now I'm running at stock volts, stock cooler, with a fugly Gigabyte M85M-US2H board.

It passes Prime flawless for 2hs, and OCCT Linpack test... wich it's enough for me. But when I use it with the L3 cache unlocked I get a warning in the Windows System Events that says:

"A corrected hardware error has occurred.

Component: AMD Northbridge
Error Source: Corrected Machine Check
Error Type: 28
Processor ID: 0

The details view of this entry contains further information."

No problems so far. NB is running at 2466Mhz, memory at 822Mhz 4-5-5-13



Does anybody have the same warning with the unlocked cache?

[memel]

Athlon II X4 620 unlock L3 @3,6Ghz 1,33V Real Voltage. 24/7
Biostar TA785GE

[Cele303]

Great job guys, spread the word

Andi64, I will check my system event log for you and I will let you know...

[tbone8ty]

I take it one cant unlock L3 cache on a sb600 mobo?

which mobo's unlock this?

---------------------------------------------------------

debating what I should do to replace my boring Phenom 9850...

go with the $99 Athlon II X4 620 and a new am3/am2+ mobo, still keeping my ddr2 ram... and try unlocking the L3...


or just get a 965 C3 and wait for 890FX mobos

[Andi64]

You need a board with ACC or NVCC to unlock the L3 (SB710, SB750 on AMD boards, and with nVidia I think 8100/8200 series have it, but only on the latest revision).

Anyway, an Athlon II X4 620 will clock between 3.6~3.9Ghz, and it will outperform your Phenom I even without the L3.

[tbone8ty]

cool thanks...

yeah for the price of a Phenom II 965 C3 ($195)

I can get an Athlon II X4 620

and a Gigabyte MA785g-UD3H

http://www.newegg.com/Product/Produc...82E16813128395


or should i stick with a 750 southbridge instead of a 710 southbridge?

[FlanK3r]

Cele, can u compare with the same CPU and NB clock, DDR2 vs DDR3 in superpi 1M and 32M? Very thank u

[rouge]

Unfortunately I'm unable to unlock the cache on my 620, I get no video when I enable ACC. On the Bright side the 620 is an excellent OC'er (3.8GHz 1.425v)
Best $89 CPU ever.

[theoldtimer]

Cele303 would you ran a couple of Cinebench 10 64-bit tests (32-bit is ok if it’s easier for you) at the highest clock you can but with the L3 locked or disabled and then with it unlocked? I’m interested in knowing how much difference the L3 makes. BTW, great test results on the 620.

[tbone8ty]

here is a good review about the difference between L3 cache enabled and disabled.

they underclocked a 965 to 2.6 ghz to compare.

http://www.techpowerup.com/reviews/A...X4_620/10.html


seems like the L3 cache mostly helps in games.

also OC'd it to 3.6 ghz and it beats the 965 in every test except for games

hope this helps

[theoldtimer]

Thanks for the link tbone8ty. I read the article with test results and thought it was interesting.

[Cele303]

Cele, can u compare with the same CPU and NB clock, DDR2 vs DDR3 in superpi 1M and 32M? Very thank u

Asrock A770DE+ DDR2 vs Asrock M3A770DE+ DDR3 with the same cpu frequency? Ok, no problem but the time is not on my side, very busy this days, end of year, lot of paper work...