AMD Bristol/Stoney Ridge Thread

[Abwx]

http://store.hp.com/us/en/pdp/Lapto...ch laptop-t5y05av-1?jumpid=Laptops_Finder_PDP

single dimm...sigh

Dual dimm for the low cost HPs and Acer, and likely also for the Lenovo :

https://geizhals.de/?cat=nb&xf=6749_19#xf_top

 

[monstercameron]

Dual dimm for the low cost HPs and Acer, and likely also for the Lenovo :

https://geizhals.de/?cat=nb&xf=6749_19#xf_top

Im in the US, not sure if those will ever hit our shores...and theyre ugly

 

[Abwx]

That s standard designs so i dont see what is ugly...

Notice that the Acers have 128GB SSD + 1TB HDD while the HP has a single 256GB SSD drive, also the 9700P based Acer is relying on the IGP only..

 

[Dresdenboy]

Found here: http://forum.ixbt.com/topic.cgi?id=8:25085-3

 

[hrga225]

Found here: http://forum.ixbt.com/topic.cgi?id=8:25085-3

Nice find!


Also completely off topic:
You are fluent in Russian? If nick says anything you were born in DDR,I guess in late 70s,so you learnt it in school as secondary language?
I read cyrilic so I can understand lots of it.

If too personal just ignore it.

 

[The Stilt]

Just as though, no unlocked SKUs it seems

 

[hojnikb]

thats a pretty high gpu clock

 

[dooon]

A12-9800E benchmark results

GFXBench
AMD A12-9800E RADEON R7, 12 COMPUTE CORES 4C+8G
https://gfxbench.com/device.jsp?benchmark=gfx40&os=Windows&api=gl&cpu-arch=x86&hwtype=iGPU&hwname=AMD%20Radeon%20R7%20Graphics&did=33010277&D=AMD%20A12-9800E%20RADEON%20R7%2C%2012%20COMPUTE%20CORES%204C%2B8G

Sandra
AMD A12-9800E RADEON R7, 12 COMPUTE CORES 4C+8G (2M 4T 3.49GHz/3.8GHz, 1.2GHz IMC/1.3GHz, 2x 1MB L2)
http://ranker.sisoftware.net/show_d...e6dbeacca499a98ff7cafadcb9dce1d1f784b981&l=en

 

[The Stilt]

A12-9800 has 33MB/s per GFLOP of memory bandwidth. That would be the same as running a FX-8800P with DDR-1732MHz memory clock. Talking about bottle necks... D: What a waste :'(

 

[Dresdenboy]

Nice find!


Also completely off topic:
You are fluent in Russian? If nick says anything you were born in DDR,I guess in late 70s,so you learnt it in school as secondary language?
I read cyrilic so I can understand lots of it.

If too personal just ignore it.

Thx. And you're mostly right, but I'm just not fluent in Russian anymore. Reading is OK, especially for technical stuff (many transliterations).

 

[Shehriazad]

Aside from the fact that I totally feel like BR is a waste of time already as a laptop product...they always manage to have their partners totally butcher the chips.

Either they use single ram sticks or they just make stuff with weird clocks.

 

[coffeemonster]

A12-9800 has 33MB/s per GFLOP of memory bandwidth. That would be the same as running a FX-8800P with DDR-1732MHz memory clock. Talking about bottle necks... D: What a waste :'(

is the bottleneck the bus or the supported memory clocks? would replacing the factory DDR4 with the tightest timings you could buy make a noticeable improvement?

 

[The Stilt]

is the bottleneck the bus or the supported memory clocks? would replacing the factory DDR4 with the tightest timings you could buy make a noticeable improvement?

The memory bandwidth (frequency) itself. 2400MHz and 128-bit interface means 38.4GB/s total bandwidth for the system. Lowering the latency makes no difference what so ever in this case. 2400MHz is the maximum any 15h APU can support by the design.

 

[hrga225]

Thx. And you're mostly right, but I'm just not fluent in Russian anymore. Reading is OK, especially for technical stuff (many transliterations).

I don't speak Russian at all,but like I said,I can read and write in Cyrilic scripture(learned it at school as official scripture beside Latin scripture) and being native Croatian speaker helps out too(both being Slavic languages).


Back to topic:

Fottenberg at SA forum says that BR can support ddr4-3600 through AMP.

http://semiaccurate.com/forums/showpost.php?p=265077&postcount=631

 

[The Stilt]

I don't speak Russian at all,but like I said,I can read and write in Cyrilic scripture(learned it at school as official scripture beside Latin scripture) and being native Croatian speaker helps too(both being Slavic languages).


Back to topic:

Fottenberg at SA forum says that BR can support ddr4-3600 through AMP.

http://semiaccurate.com/forums/showpost.php?p=265077&postcount=631

AMP standard including theoretical support for 3600MHz or even higher is irrelevant, when the memory controller itself cannot support anything higher than 2400MHz.

BKDG for Carrizo & Bristol Ridge is available at AMD support site. The width of the memory frequency control register already reveals that you cannot even program anything higher than 2400MHz, so that's no secret. There are five bits for MEMCLK and 2400MHz is encode as 1Fh or 11111b.

 

[monstercameron]

A12-9800 has 33MB/s per GFLOP of memory bandwidth. That would be the same as running a FX-8800P with DDR-1732MHz memory clock. Talking about bottle necks... D: What a waste :'(

What about the too sku mr.stilt...3.8 base huh...

 

[dark zero]

What a dissaster from AMD. Seems that the memory bandwidth is a massive issue from them. Raven Ridge must correct that before anything.

 

[coffeemonster]

The memory bandwidth (frequency) itself. 2400MHz and 128-bit interface means 38.4GB/s total bandwidth for the system. Lowering the latency makes no difference what so ever in this case. 2400MHz is the maximum any 15h APU can support by the design.

:\
I really thought DDR4 would offer some improvement at the same frequency. Shame.

 

[LTC8K6]

thats a pretty high gpu clock

Will we see throttling?

 

[NTMBK]

:\
I really thought DDR4 would offer some improvement at the same frequency. Shame.

Kaveri was only officially rated for DDR3-2133, so official support for DDR4-2400 is an improvement. Hopefully it will support slightly faster kits.

 

[deasd]

Kaveri was only officially rated for DDR3-2133, so official support for DDR4-2400 is an improvement. Hopefully it will support slightly faster kits.

[sarcasm]Well, maybe AMD want to FUD its users by limiting IMC to DDR3 level and let their DDR4 consume more power in vain.[/sarcasm]

I can't find any review that testing APUs with higher than DDR3 2400, but AMD indeed has official comparison between 2400 and 2133, which showed higher performance with 2400. We have to wait & see how BR hold DDR4.

 

[coffeemonster]

Kaveri was only officially rated for DDR3-2133, so official support for DDR4-2400 is an improvement. Hopefully it will support slightly faster kits.

I've read the max memory bandwidth for Kaveri is 34GB/s and stilt said 38.4 for bristol ridge so it is a slight improvement, but not as much as I was hoping. Still probably going to be 1080p/medium/30fps gaming on average.

 

[hojnikb]

:\
I really thought DDR4 would offer some improvement at the same frequency. Shame.

Why would you think that ?

 

[Shehriazad]

Haven't we learned anything from DDR2 -> DDR3?

Early on kits with the same mhz were actually worse than their DDR2 counterparts in terms of performance.

You had to go up in mhz quite a tad just to outdo the DDR2 stuff...it wasn't until later when DDR3 started to really shine.

DDR4 is the same shyte all over again.

Put them head to head at the same Mhz clocks and DDR4 is not going to shine in terms of performance.

Once they manage to put out 3000+ Mhz kits at low CL values as the STANDARD is when it gets interesting.

 

[LTC8K6]

Haven't we learned anything from DDR2 -> DDR3?

Early on kits with the same mhz were actually worse than their DDR2 counterparts in terms of performance.

You had to go up in mhz quite a tad just to outdo the DDR2 stuff...it wasn't until later when DDR3 started to really shine.

DDR4 is the same shyte all over again.

Put them head to head at the same Mhz clocks and DDR4 is not going to shine in terms of performance.

Once they manage to put out 3000+ Mhz kits at low CL values as the STANDARD is when it gets interesting.

IIRC, there will be a 2400 hard limit with these chips?