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*** AMD "Zen" thread (inc AM4/APU discussion) ***

DragonQ;30498500 said:
I would imagine only X370 will support 16x/16x but B350 motherboards with two 16x slots would work at 8x/8x.
Click to expand...
Doesn't Ryzen have precisely 24 lanes of PCIe 3.0 meaning it will never support dual X16?

My understanding is in a common setup that 24 will be divvied up:

  • X16 PCIe 3.0 to Graphics Card
  • X4 PCIe 3.0 to NVMe SSD
  • X4 PCIe 3.0 to motherboard chipset (which then presents it to the remaining slots etc as X8 of PCIe 2.0)
 
Spyhop;30500380 said:
Doesn't Ryzen have precisely 24 lanes of PCIe 3.0 meaning it will never support dual X16?

My understanding is in a common setup that 24 will be divvied up:

  • X16 PCIe 3.0 to Graphics Card
  • X4 PCIe 3.0 to NVMe SSD
  • X4 PCIe 3.0 to motherboard chipset (which then presents it to the remaining slots etc as X8 of PCIe 2.0)
Click to expand...

1151 doesn't support x16/x16 either ;) spec is either 1x16 or 2x8
 
Pants;30499999 said:
Does U.2 give me anything over M.2 for a gaming / programming / photo editing machine?

You seem keen on it just wondering why?
Click to expand...

Basically:

U.2 = SATA replacement
M.2 = mSATA replacement

It all depends on if you plan to add extra drives in the future or not really, I usually keep my builds for a few years, so obviously I would like to avoid having to add extra U.2 ports to a board via a PCI-E card in order to connect more drives (as the PCI-E slots on AM4 boards are limited anyway).
 
ubersonic;30500460 said:
Basically:

U.2 = SATA replacement
M.2 = mSATA replacement

It all depends on if you plan to add extra drives in the future or not really, I usually keep my builds for a few years, so obviously I would like to avoid having to add extra U.2 ports to a board via a PCI-E card in order to connect more drives (as the PCI-E slots on AM4 boards are limited anyway).
Click to expand...
True, another downside of U.2 would be less options in the future. I always end up moving my old SSDs to other machines (often laptops) and M.2 is more common at the moment.
 
Spyhop;30500380 said:
Doesn't Ryzen have precisely 24 lanes of PCIe 3.0 meaning it will never support dual X16?

My understanding is in a common setup that 24 will be divvied up:

  • X16 PCIe 3.0 to Graphics Card
  • X4 PCIe 3.0 to NVMe SSD
  • X4 PCIe 3.0 to motherboard chipset (which then presents it to the remaining slots etc as X8 of PCIe 2.0)
Click to expand...

As I understand it motherboard manufacturers can add extra lanes but obviously that would come at extra cost. Apparently those extra lanes (if say 16x) are not necessarily any quicker than having just 8x, in fact I read it is hard to saturate pcie 3.0 even with a TitanX. If that's the case I can't see the point in paying for PLX chips on your motherboard.

If I'm wrong I'm sure someone will be along shortly to correct me ;)
 
Armageus;30500591 said:
It adds some flexibility - i.e. instead of statically allocating 8x/8x, it allows it to dynamically share lanes i.e. in a non-sli supporting game the first card will get the full 16x lanes as the 2nd card won't be using any bandwidth.

Some more explanation here:
http://www.anandtech.com/show/6170/...x-8747-featuring-gigabyte-asrock-ecs-and-evga
Click to expand...

Ah thanks, hence the reference I saw to them being logical rather than physical lanes. They really don't that clear that clear on the motherboard specs. I wonder why? ;)
 
DragonQ;30500563 said:
True, another downside of U.2 would be less options in the future. I always end up moving my old SSDs to other machines (often laptops) and M.2 is more common at the moment.
Click to expand...

Yes, at the moment so in the future U.2 will be just as common place, so that can't really be a negative.
 
Nutella33;30500655 said:
Unless you are buying now and that doesn't happen.
Click to expand...

What possible alternative have you got? SATA Express was the chosen physical connector for U.2 compatibility as it already is a standard to replace the normal SATA bus, change the pinout and you have a U.2 compatible port using the PCIe bus (4x). :confused:
 
SiDeards73;30500672 said:
Ooooh

https://videocardz.com/65913/how-fast-is-ryzen
Click to expand...

Not sure what to make of that as it would have been better if the clockspeeds had been fixed to the same number for all the SKUs. Looking at that the 4C and 6C seem to have better IPC?? They seem to have BW-E level IPC and the 8C slightly under that?? The motherboard was a B350 it seems.
 
CAT-THE-FIFTH;30500753 said:
Not sure what to make of that as it would have been better if the clockspeeds had been fixed to the same number for all the SKUs. Looking at that the 4C and 6C seem to have better IPC?? They seem to have BW-E level IPC and the 8C slightly under that?? The motherboard was a B350 it seems.
Click to expand...

No re-read it - physics score divided by core count (so dividing by 8 will always be less)

Rubbish graph in other words


Edit:
E.g. the [email protected] is exactly 3552 (*4 = 14208 which is in the top right graph)
 
Armageus;30500756 said:
No re-read it - physics score divided by core count (so dividing by 8 will always be less)

Rubbish graph in other words
Click to expand...

I get what you mean,but look at the full scores,the 6 core Ryzen is very similar to the Core i7 6850K and the 4C Ryzen is only running at 3.2GHZ~3.4GHZ,but it seems the top SKU will running at 3.5GHZ~3.9GHZ,so if we say 3.7GHZ,with all cores,that would put a stock Core i7 7700K around 20% to 25% faster,ie,mostly down to clockspeed deficit.

If those price rumours are right and the top 4C/8T SKU is targeting the £175 to £200 price-point it is going to be very good for the price.
 
OK,I had a quick look on the 3DMark website:

http://www.futuremark.com/hardware/cpu/Intel+Core+i7-4790K/review

That 3.2GHZ~3.4GHZ 4C/8T Ryzen scores 10177,and a Core i7 4790K around 10660. A Core i7 5775C scores around 11110.

So depending on all the cores Turbo on the top 3.5GHZ~3.9GHZ SKU,we could be seeing another 10% to 15% clockspeed increase,which would take it to Core i7 5775C levels.

If that is £175 to £200,like the rumours are hinting,thats really going to be decent £100 to £200 CPU there!! :)
 
Spyhop;30500769 said:
These sorts of dodgy articles will be a distant memory soon, once the quality publications lift the covers!
Click to expand...

yes its these im first articles which cause most of the bs arguements.

how i long for a decent legit benchmark :p
 
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