AMD 3870K has landed @ the 'egg

[Soulkeeper]

I get 4fps in the unigine heaven benchmark with my 3850 at 2048x1536 🙂

 

[cebalrai]

Here's a very positive review which also includes a 6670 in dual graphics mode.

http://www.hardwareheaven.com/revie...graphics-performance-review-introduction.html

 

[micrometers]

Actually it does. When anandtech did their initial testing of the A8-3850 it was discovered that performance went up with faster ram. I believe almost 20% gain in some instances.

yeah, sure, but not a core over clock.

 

[StrangerGuy]

Here's a very positive review which also includes a 6670 in dual graphics mode.

http://www.hardwareheaven.com/revie...graphics-performance-review-introduction.html

That has to be the one of the worst reviews I have ever seen. No comparison to other Intel or AMD chips, no power consumption tests, and there isn't even a clear indication whether the scores are stock or OCed. WTF were they doing?

 

[Soulkeeper]

That has to be the one of the worst reviews I have ever seen. No comparison to other Intel or AMD chips, no power consumption tests, and there isn't even a clear indication whether the scores are stock or OCed. WTF were they doing?

no drop down menu to select or even see how many pages are in the review either ...

maybe they were just experimenting with adobe to feel "cool"

 

[johnf1285]

Well I've got a 8GB kit of 2133MHz RAM coming along with it. My concern is if there is a BIOS option to change the GPU multiplier. I guess we'll see!

I have the A8 3870k and the FM1a75 I mini ITX Asus board with 8gb of 1866mhz ram. It was a pain to get the ram to the right speed and timings. Finally got it set correctly. I believe D.O.C.P is the right setting that will allow you to change the ram speed? I forget. But I know it wasn't like anything else I've been familiar with (Gigabyte boards FTW).

I haven't seen any bios settings to clock the GPU over the 600mhz mark. If you find some, please share!

I love this little machine. I built it for the wife so she can play a few games on a budget (and so she can stay off of my i5 2500k / GTX 560 ti rig 😀 )

 

[cebalrai]

That has to be the one of the worst reviews I have ever seen. No comparison to other Intel or AMD chips, no power consumption tests, and there isn't even a clear indication whether the scores are stock or OCed. WTF were they doing?

And they benchmarked Skyrim with Dual Graphics, despite the fact that DX9 games are incompatible with that feature 🙂

 

[Soulkeeper]

Just picked up my A8-3870 at fry's just now 🙂

blew a radiator hose in my truck on the way back
i'll post some linux benchmarks later on

btw "K" is nowhere on the box or heat spreader, just "black edition"
I guess "K" is an internet mislabeling

 

[Idontcare]

Welcome to the forums johnf1285! :thumbsup:

Just picked up my A8-3870 at fry's just now 🙂

blew a radiator hose in my truck on the way back
i'll post some linux benchmarks later on

btw "K" is nowhere on the box or heat spreader, just "black edition"
I guess "K" is an internet mislabeling

Dang, that's rotten luck 🙁

Yeah the whole "AMD copies Intel's "K" nomenclature" was just a bunch of rumorsite BS reminding us why their sites are to be considered as nothing more than rumorsite BS.

 

[OS]

http://www.neoseeker.com/Articles/Hardware/Reviews/amd_llano_dual-graphics_asus_hd_6670/

there is a favorable review on dual graphics and how well it scales on newer games

 

[spaceman]

got my 3670k today
stock hs is ..disappointing🙁

 

[Soulkeeper]

bummer putting in my 3870 doesn't unlock the 2133 mem divider in the bios 🙁
I guess asrock needs to update their bios

 

[Soulkeeper]

Here are some preliminary benchmarks:

3850 @ stock
vcore 1.25v
cpu nb 654MHz
nb/gfx 1.15v
gfx auto (600MHz)
dram 1866 1.5v 9-10-9-27 1t
pcie 1.11v
sb 1.1v


lsbench2 (v0.0.6 11/23/2011) linuxsociety.org

Options:
Threads: 4 Memory: 4096
Running Synthetic Tests...
Memory Bandwidth: 25414.139965 MB/s
Single Thread: 11.552973 Gflops
Multi Thread: 46.149497 Gflops
Running Pattern Matching Test...
Pattern Scan Rate: 2545.413353 KB/sec
Running Evolution Simulator Test...
Speed: 0.105934 sec/yr (lower is better)

transcode mpeg2/aac to webm
4m4.735s

untar kernel and compile on SSD
2m50.448s

mplayer benchmark h264 playback (no sound)
rage screener: 47.117s
outdoor scene: 17.022s

mplayer benchmark vp8 playback (no sound)
1080p movie trailer: 5.614s

3870 @ 3.2GHz 32x 100 bclk
vcore 1.35v
cpu nb 720MHz
nb/gfx 1.20v
gfx 720MHz
dram 1866 1.5v 9-10-9-27 1t
pcie 1.11v
sb 1.1v


lsbench2 (v0.0.6 11/23/2011) linuxsociety.org

Options:
Threads: 4 Memory: 4096
Running Synthetic Tests...
Memory Bandwidth: 26515.709098 MB/s
Single Thread: 12.755521 Gflops
Multi Thread: 50.943856 Gflops
Running Pattern Matching Test...
Pattern Scan Rate: 2803.853618 KB/sec
Running Evolution Simulator Test...
Speed: 0.094771 sec/yr (lower is better)

transcode mpeg2/aac to webm
3m30.295s

untar kernel and compile on SSD
2m35.511s

mplayer benchmark h264 playback (no sound)
rage screener: 43.982s
outdoor scene: 15.013s

mplayer benchmark vp8 playback (no sound)
1080p movie trailer: 5.195s


I still gotta do some more stability tests specifically with graphics
going to run the unigine benchmark for awhile

 

[Gikaseixas]

Nice, now oc it and share with us how high you can take this chip

 

[Soulkeeper]

unfortunate discoveries after a few hours trying to get it stable

this 3870's nb/gfx don't clock as high as my 3850 with 1.15v
and unfortunately (even tho the bios lets me select higher voltages) 1.15v is the highest I can get

so I must run 600MHz/600MHz for the nb/gfx
my 3850 did 654/600

I'm pretty sure I could get higher with 1.20v or 1.25v

asrock fails again !

I assume the nb and gfx are on the same power plane ?
can anyone confirm this ?

the voltages are not decoupled in my bios. also limited as mentioned above

I'm not confident i'll get much more cpu overclock on this either, 1.35v vcore was a must to get 3.2GHz

 

[Soulkeeper]

What is the intended default nb/gfx voltages for these llanos ?

can't seem to locate this information anywhere.

 

[jacktesterson]

Overclocking with a ITX setup?

 

[Soulkeeper]

Overclocking with a ITX setup?

yes, just trying to match the performance of my 4+ year old core2 system that I replaced.
not doing extreme overclocking here.

 

[pcsavvy]

Here is some technical info about the 3870K
http://www.cpu-world.com/CPUs/K10/AMD-A8-Series A8-3870 AD3870WNZ43GX.html

Hope it helps.

 

[Soulkeeper]

Here is some technical info about the 3870K
http://www.cpu-world.com/CPUs/K10/AMD-A8-Series A8-3870 AD3870WNZ43GX.html

Hope it helps.

Thanks, But unfortunately it don't list any info about the northbridge freq/voltage 🙁

 

[richierich1212]

Maybe this post will help? He's using some sort of program or something to adjust vcore.

http://www.overclock.net/t/1013625/linux-substitute-of-a64-tweaker#post_13498867

 

[Soulkeeper]

Maybe this post will help? He's using some sort of program or something to adjust vcore.

http://www.overclock.net/t/1013625/linux-substitute-of-a64-tweaker#post_13498867

That's vcore with the frequency scaling in linux, which all works fine here.
the nb voltage appears to not be exposed via registers and is intended to be set properly by the bios at boot

I am waiting on an email response from amd on what the default nb voltage is supposed to be.
Also no idea what the default nb freq is supposed to be with these chips or any llano chips.
I wrote a program for adjusting gpu clocks/voltages also using AMD's adl sdk, but it don't support llano so I can't adjust anything using that untill they upgrade it.

as you can see the vddc is 1.14v actual nomatter what i'd like to set it to
if I set say 1.30v in the bios for "NB/GFX" 1.14v is still set

which leads to another question, if the vddc adjustment was to work would it also adjust the nb voltage ?
ie: gpu+nb on the same power plane

AMD possibly layed off the employee responsible for the ADL SDK and fglrx interop (likely not a high use project). Also possible is the A75/llano doesn't lend itself to clock/volt adjustments after boot.

My immediate problem is my bios nb/gfx voltage adjustment does not work
which is a failure on asrock's part

 

[Zap]

bummer putting in my 3870 doesn't unlock the 2133 mem divider in the bios 🙁

Isn't that a limitation of the IMC? Llano maxes out at 1833 and it will take Trinity to hit 2133.

 

[Vesku]

Should email Asrock, at least get your concerns noted. Historically there haven't been many ITX boards I would call OC friendly.

 

[Soulkeeper]

Isn't that a limitation of the IMC? Llano maxes out at 1833 and it will take Trinity to hit 2133.

The highest official mem speed supported by llano is 1866
I can't speak to the limiting factor for overclocking above that, I'm inclined to think it's a bios matter.
can't people run ddr3 at 2133 on am3+ or intel boards even tho it's not officially supported ?

funny how my motherboard box says "ddr3 2400+"
yet it has no dividers for such a falsehood, and it corrupts the bios if you attempt to even remotely approach the bclk needed for such speeds ...