Which gigabit netgear switch is best for jumboframes ?

StephenB wrote:

It seems unlikely that a switch would behave differently in the upload vs download. All transfers through the switch look pretty much the same (and involve both an upload link and a download link). Can you bypass the switches and directly connect the two PCs? (manually configuring the IP addresses). That would let you know if the switches and cabling are to blame. If they are, I'd look at the cabling first, I'd also try different switch ports. BTW, what performance are you getting with jumbo frames off?

I will of course get higher transfer rates with direct NAS -> PC transfer !
The whole house are using high quality cat7 ethernet cables - turning off jumboframes in my pc gives severerly lower transferrate with big files - but almost no difference in transfer of small files ?

My "concern" is of course the variable speed in upload - and I can't think of anything else than that it must be the switch/es that causes it
My main computer and the nas are on the same switch - just copying files of different sizes (nas - pc - nas) with a horrible low speed at merely 20Mbps

The other NAS is a another brand with specifications way over netgear readynas ultra6 (and it is putting out much more performance too here home) - and cost's almost twice as much - so I am not complaining on the ultra6 !

EDIT; I think I'll order a Intel Pro/1000MT Dual Port Adapter and connect this pc and the nas directly since the Ultra6 have two nics - that should do it ?