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This is bad for multi GPUs - Intel Core i7-5820K Features Fewer PCI-Express Lanes After All
- Thread starter Kaapstad
- Start date
You can still use 2 gpu's with 0 difference at all with 28 lanes.
No you can not you need at least 32 lanes to run X16/X16
I would expect the above configuration to be the absolute minimum for any CPU with the label EE or HEDT.
The difference between X8,X8 and X16,x16 is so minimal. Tri SLI for example running at x8,x8,x8 would also be absolutely fine on the 28 lanes.
Soldato
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The i7 920 had no PCI express lanes or controller only the X58 chipset hand them , it wasn't until Lynnfield that intel CPU's started having PCIE lanes/controllers directly built into them
The point is if I put a couple of cards into one of my X58 systems they will run @X16/X16.
You are missing the point too
If I buy a HEDT CPU I want performance that is better than older CPUs not worse.
Caporegime
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The CPU performance is better.
The 5820 isn't meant to be replacing the 4930, it's replacing the 4820.
If you go 4930 to 5930 you're not getting worse performance.
It is a poor move by Intel, but it's to be expected, they've just improved their price/performance CPU end at Hexcores, they've compensated with the PCI-E Lanes.
At PCIe 2.0.....there is not even a native PCIe 3.0 interface on X58............
PCIe 3.0 per lane throughput might not be double that of PCIe 2.0 but it certainly caters for more than enough bandwidth for current GPUs.
It's an entry level cpu. To get the sort of performance you want, then are you really going to buy a 5820k ? There is absolutely nothing wrong with running pcie 3.0 x16 with 1 gpu, x16x8 with 2 or x8x8x8 with 3. You're not going to get x16,x16,x16 out of a 40 lane anyway, and at x16x16x8 you'll prob start to get latency issues and I bet x8x8x8 wouldnt be too far behind at all.
If I was going to get an Haswell-E in the near future I would be looking at the 5930.
The 5820 I am not keen on for the reasons above.
The 5960X concerns me a great deal as it has a very low stock speed and I suspect very poor overclocking performance (I hope I am wrong) as I can not see what is effectively two 4770ks strapped together doing very well.
That leaves the 5930 hexcore.
16x/16x/8x and 16x/8x/4x at PCI-E 3.0 should still be fine for tri-fire/SLI no? I can't see any cards exceeding PCI-E 3.0 8x bandwidth any time soon /shrug.
After all it is the equivelent of PCI-E 2.0 32x/32x/16x and 32x/16x/8x.
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there shouldnt be anything "only" about Haswell - E , which is a premium option already.
Make the cache the differentiator, not something crucial like PCIE lanes
After all this whole processor line is only appealing to a tiny percentage of users in the first place - high performance /extreme users - its a bit of a con to do this kind of thing imo
At PCIe 2.0.....there is not even a native PCIe 3.0 interface on X58............
PCIe 3.0 per lane throughput might not be double that of PCIe 2.0 but it certainly caters for more than enough bandwidth for current GPUs.
Strange things have happened on my X58 system
For example I got much better performance from a GTX 690 @PCI-E 2.0 X16 on X58 than I did on my 3960X system running the card in it's native X16 PCI-E 3.0 configuration. Them i7 9XX CPUs were quality SKUs intel don't seem to make them that good anymore.
Ha!!!!!
So the 5820K is worst than the Ivy-E when comes to multi gpu?
Who could believe it!!!! (sarcasm)
Seems a 4930K makes more sense today, lets hope they drop in price to grab one to have it as backup, for when the day comes and the 4820K decides that had enough running at 5Ghz.
So the 5820K is worst than the Ivy-E when comes to multi gpu?
Who could believe it!!!! (sarcasm)
Seems a 4930K makes more sense today, lets hope they drop in price to grab one to have it as backup, for when the day comes and the 4820K decides that had enough running at 5Ghz.
Caporegime
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The 5960x will likely have heat constraints which makes its stock clock what it is.
Exactly, but the hard point is in the understanding for some people. They just dont.