100mb vs 1000mb network result?

ubern00b said:
I know Im probably preaching to the choir here but 20mbit stream should hardly bottleneck a 100mbit lan.
Click to expand...

I said 20mb\sec, which is 160mbit. Given that the average 100mbit LAN isn't going to be much more than 11mb\sec (TCP overheads, chip inefficiencies), thats nearly 50% short in bandwidth terms.

Funnily enough, he benchmarks and gets 11.5mb\sec...
 
Sorry for being pedantic but I think you mean 20mB/s (bits vs bytes) and you will be hard pressed to find ANY HD stream (maybe RAW video) that is actually 20mB/s average bitrate. Full Blu-Ray discs peak at around 75mbit and you will find re-encoded x264 material have average bitrates of 8-10mbit for 1080p.
 
ubern00b said:
Sorry for being pedantic but I think you mean 20mB/s (bits vs bytes) and you will be hard pressed to find ANY HD stream (maybe RAW video) that is actually 20mB/s average bitrate. Full Blu-Ray discs peak at around 75mbit and you will find re-encoded x264 material have average bitrates of 8-10mbit for 1080p.
Click to expand...

Other than possibly disk fragmentation, I can't think of any other reason for the lag...

MPEG-2 bitrates can be quite high, but yes H264 is a lot lower.
 
Drive-to-drive transfers on my LAN are in the 40MB/s region but RAM to RAM I can max out the full theoretical limit. PCI bus speed / bandwidth must come into play somewhere because I got faster transfers with PCI-X gigabit cards compared with PCI cards.
 
Another reason for going for the better Intel gig NIC's (especially on Linux) are the quality of the drivers. Some drivers for Linux are pathetic, putting gig cards down into the 100Mb/s range.

PCI-X is preferred for reaching theoretical GIGe network speeds, and don't forget the ~20% TCP overheads if you are using TCP.

//TrX
 
Isn't PCI-X an enterprise/server level standard?

PCI Express - Home/prosumer.
PCI-X - Server/enterprise.

The only time I've seen a PCI-X slot is on the HP server rack I managed to pick up second hand off the Bay of E.
 
PCI-X was around long before PCIe,

and yes, PCI-X is seen mostly in servers, but it can be found on some decent desktop/workstation MOBO's

And the main reason I use it personally is because IntelPRO/1000MT gigabit cards are much cheaper in PCI-X than PCIe (as they are older)

//TrX
 
Fair enough, if you can find me a PCI-X compliant board with the P35 chipset and DTS connect, I'll sing your praises.
 
Oh, and it must have at least 8 SATA II connectors and an IDE.

(If you haven't guessed, these are my system requirements, I'm looking to move up to a rock solid gigabit & the P35 chipset, my Abit AW9D-MAX already offers all these features apart from the 975 chipset, Dolby Digital Live (instead of DTS Connect), Marvell Gigabit LAN and PCIe)
 
Last edited:
Ahh, the marvell chipsets are pretty good too.

I always go for the Intel's because none of my systems have on board gigabit.
I'd give the onboard NIC a try, and if you are not feeling the power.. maybe consider a PCIe card (if you are feeling rich lol)

//TrX
 
Whooops, I stand corrected, I wish it was a Marvell, but it isn't, it's old crabby realtek RTL8168. :(

So, offer still stands bud! :)
 
You must log in or register to reply here.
Back
Top Bottom