Question about PCI-E lanes on X299

[Legend]

If you're using a X299 CPU/mobo option that gives you x28 PCI-E lanes and have 1080Ti in SLI configuration, how limited are you for utilising other PCI-E lanes for SSD, M.2 etc?

This is an area I'm a bit dark on having never run SLI before, but am I right in saying you would run the cards at x16 and x8 (x16 x16 not being possible) leaving x4 PCI-E lanes left for other usage?

It just seems to be you could eat up those lanes REAL quick, having spent a huge amount of money on all your components, only to find you can't run them all!?

 

[Yaayuh!]

Probably enough tbh.

 

[Disco_P]

Spending huge amounts of money on components is what intel wants.

How pcie lanes are allocated depends on the mobo, cpu and where you plug stuff in. This is msi's way of doing it on x99 https://forum-en.msi.com/index.php?topic=251355.0

It's just going to get more confusing with 16 lane CPUs as well.

 

[Legend]

Yeah, this really seems to be something that AMD have thought more about given the extra lanes Threadripper brings. Seems bang out of order to me that you could buy a board with x3 M.2 drive slots (as many X299 boards have) and find you can't use 1 or 2 of them, or potentially even NONE if you had SLI with a 16 lane CPU? Is that possible??

 

[Panos]

If you're using a X299 CPU/mobo option that gives you x28 PCI-E lanes and have 1080Ti in SLI configuration, how limited are you for utilising other PCI-E lanes for SSD, M.2 etc?

This is an area I'm a bit dark on having never run SLI before, but am I right in saying you would run the cards at x16 and x8 (x16 x16 not being possible) leaving x4 PCI-E lanes left for other usage?

It just seems to be you could eat up those lanes REAL quick, having spent a huge amount of money on all your components, only to find you can't run them all!?

Is not that clear cut. Not all lanes are available for PCI-E, GPU etc. Unfortunately the low count on the X299 make it's purchase daft in 2017.
Is not 2012-13 any more where 40 lanes could cut it. There are so many devices these days that use PCI-E. Plug 2 M.2s or couple of NVMEs and you are done.
What's the point of NVME raid on the X299 when it cannot be used and you have to buy extra keys from Intel to make it work also?

in addition Intel hasn't made clear how the 44 lanes are distributed and if any exclusives exist.

We know from AMD the X399 64 lanes (all Ryzen 9 have them), going to be 48 dedicated to GPUs if needed, so 16x16x16 can be done.
The left over lanes 16 lanes are more than enough to provide comms to many devices also.

 

[Legend]

The more I read, the more apparent it becomes that this really is a d**k move from Intel!

 

[AllBodies]

The more I read, the more apparent it becomes that this really is a d**k move from Intel!

Get X399 Threadripper instead. You'll get 64 lanes, and far cheaper per core of cpu you buy. Rumour is the 16 core will only be £800.

People (especially people who want to do multi-GPU) should punish Intel for cheaping out on the PCI lanes.

 

[Panos]

Get X399 Threadripper instead. You'll get 64 lanes, and far cheaper per core of cpu you buy. Rumour is the 16 core will only be £800.

People (especially people who want to do multi-GPU) should punish Intel for cheaping out on the PCI lanes.

Yeah Ryzen 9800 is expected around £850 which is half the price of the equivalent 16c from Intel and much less even than their 10core one.
And according to Guru3d, they (i9 10core+) do not overclock that well under water either. While the 18 core is based on the Xeon ship with base speed 2.4Ghz and 1 core boost to 3.4.
Which is going to be interesting how they will boost it to at least a base of 3.4.


If you see above the naming R 9800 made bold, the last time we had a product with that name was the Radeon 9800. Possibly one of the best ATI for it's generation.......

 

[AllBodies]

Yeah Ryzen 9800 is expected around £850 which is half the price of the equivalent 16c from Intel and much less even than their 10core one.
And according to Guru3d, they (i9 10core+) do not overclock that well under water either. While the 18 core is based on the Xeon ship with base speed 2.4Ghz and 1 core boost to 3.4.
Which is going to be interesting how they will boost it to at least a base of 3.4.


If you see above the naming R 9800 made bold, the last time we had a product with that name was the Radeon 9800. Possibly one of the best ATI for it's generation.......

Note it's $850 is the rumour, so it should be £800 or slightly less. Although it does look like the £ is in play again due to the unexpected election results, so far the markets aren't happy.

 

[gavinh87]

Yeah Ryzen 9800 is expected around £850 which is half the price of the equivalent 16c from Intel and much less even than their 10core one.
And according to Guru3d, they (i9 10core+) do not overclock that well under water either. While the 18 core is based on the Xeon ship with base speed 2.4Ghz and 1 core boost to 3.4.
Which is going to be interesting how they will boost it to at least a base of 3.4.


If you see above the naming R 9800 made bold, the last time we had a product with that name was the Radeon 9800. Possibly one of the best ATI for it's generation.......

I had the 9800 pro. It was a beast at the time

 

[Legend]

I think AMD need to be a bit bolder with their strategy here. They don't seem to release much in the way of official info, and X399 motherboards seem very thin on the ground vs X299. AMD would certainly benefit being more forthcoming.

 

[d_brennen]

I think AMD need to be a bit bolder with their strategy here. They don't seem to release much in the way of official info, and X399 motherboards seem very thin on the ground vs X299. AMD would certainly benefit being more forthcoming.

TBF AMD have given an outline of what's in X399, it's up to the board partners to show their wares. The reason for the scant info is probably the third parties not wanting to let every other player see what they are going to release.

For some time I've thought AMD should have reference motherboards (PC and laptop) that others can just rebrand/copy. 3rd parties are still a little burned by AM3/3+/FM1/FM2/AM1 etc

 

[Sampsy]

TBF AMD have given an outline of what's in X399, it's up to the board partners to show their wares. The reason for the scant info is probably the third parties not wanting to let every other player see what they are going to release.

For some time I've thought AMD should have reference motherboards (PC and laptop) that others can just rebrand/copy. 3rd parties are still a little burned by AM3/3+/FM1/FM2/AM1 etc

I also believe that x299 is simply closer to release than x399 so there's more stuff ready to show off.

 

[humbug]

1 GPU is 16 PCIe lanes, 2 GPU's = 32 PCIe lanes

Of course that doesn't mean the 2'nd GPU doesn't work but it may be starved of some bandwidth when needed, like 4K gaming.

This limiting PCIe lanes on less expensive CPU's.... i say less expensive but $1000 is a hell'of'a lot'a money for a CPU, well overpriced infact even for a 10 core... next to what AMD are doing its just stupid, a clear money grab born out of "AMD Threadripper man, our margins.... what do we doooo?????" panic!

 

[Legend]

To have the ALL their X299 CPU's below $1000 with only 24 or 16 lanes seems an absolutely daft business decision to me. Yes clearly they would want to push those considering the 7820X to spend nearly twice as much for the 7900X, but in light of what AMD are bringing to the table with Threadripper, I can only surmise their thinking behind this stems from pure arrogance and the belief their product is truly that much better and worthy of such a high price tag. They are blinded by their dominance in the marketplace all these years, and must take the consumers for absolute idiots. Still, plenty will hand their money over more than willingly.

 

[zornyan]

Yeah Ryzen 9800 is expected around £850 which is half the price of the equivalent 16c from Intel and much less even than their 10core one.
And according to Guru3d, they (i9 10core+) do not overclock that well under water either. While the 18 core is based on the Xeon ship with base speed 2.4Ghz and 1 core boost to 3.4.
Which is going to be interesting how they will boost it to at least a base of 3.4.


If you see above the naming R 9800 made bold, the last time we had a product with that name was the Radeon 9800. Possibly one of the best ATI for it's generation.......

well we've already seen the 10 core hit 4.8ghz with just an aio, or 5ghz with a delid+aio on the 10+core...so looks like guru3d is just spouting rumours again.

 

[Panos]

well we've already seen the 10 core hit 4.8ghz with just an aio, or 5ghz with a delid+aio on the 10+core...so looks like guru3d is just spouting rumours again.

Yeah, lets see.
a) First it requires deliding, so losing warranty on £1000+ CPU is something for you to gamble?
b) The temps were 80C+ barely trying to hold itself from throttling.
c) If the Ryzen 16 core part is in similar price, the Intel will have to run at 6.2Ghz constantly to beat the performance of the Ryzen one. Because on those appliances, we need high core count at relative good speeds, not one trick pony.
d) X299 PCI-E lanes limitation.
e) And the most important. Do you see who posted the video?

 

[Legend]

Discussions on performance are really missing the point though, when due to the PCI-E lane limitation, it's quite possible you could spend nearly a grand on a motherboard and CPU only to find you can't use half the features on the board! It simply defies belief Intel think this is acceptable for an enthusiast level platform. I hope everyone does see sense here and go with Threadripper, because for me personally, the way things are shaping up currently, it's an EASY decision.

 

[EsaT]

in addition Intel hasn't made clear how the 44 lanes are distributed and if any exclusives exist.

You think Intel knows or cares how to make any sense of that whole PCI-e lane mess?
Plan of X299 was just to separate people from their moneys.

Just like in keeping desktop platform so long limited to four cores while mostly fiddling with iGPU no enthusiast uses for really anything...

well we've already seen the 10 core hit 4.8ghz with just an aio, or 5ghz with a delid+aio on the 10+core...so looks like guru3d is just spouting rumours again.

And what was power consumption of that thing?
Likely competing with FX-9590 everyone laughed at.

 

[Panos]

nah deleted