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Old September 8, 2009, 07:04 AM
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Well its not actually i5 or i7.. its more like x58 or p55 thats the decision

The P55 just worries me with the new video cards coming out... if the 58xx series needs more then 8x speed on the bus, then that effectivelly kills the P55 platform for a lot of people... it means you can have video + audio or video + physx but not both.. in fact.. you can't even use any of the new PCI-E storage solutions either (fusion IO, Z-Drive, Colossus, etc.)
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Old September 8, 2009, 10:09 AM
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Originally Posted by Bojamijams View Post
Well its not actually i5 or i7.. its more like x58 or p55 thats the decision

The P55 just worries me with the new video cards coming out... if the 58xx series needs more then 8x speed on the bus, then that effectivelly kills the P55 platform for a lot of people... it means you can have video + audio or video + physx but not both.. in fact.. you can't even use any of the new PCI-E storage solutions either (fusion IO, Z-Drive, Colossus, etc.)
Only if you xFire.

One graphics card still runs x16 on P55. PhysX only needs x4, and audio are 1x. Thus x16/x4/x1 still works.
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Old September 8, 2009, 10:46 AM
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This is the part thats confusing... all the board makers (evga for example) list the available configuration as either

x16 and x4
x8/x8 and x4

Either way, it doesn't add to 21 which is what you'd need. Ugh. Damn you intel.
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Old September 8, 2009, 11:02 AM
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Originally Posted by Bojamijams View Post
This is the part thats confusing... all the board makers (evga for example) list the available configuration as either

x16 and x4
x8/x8 and x4

Either way, it doesn't add to 21 which is what you'd need. Ugh. Damn you intel.
Theres 16x lanes, "20"(if you count the DMI port) lanes worth a bandwidth between the CPU and everything else(excluding memory). The PLATFORM however provides, 16x 2.0 lanes from the CPU and 8x 1.0 lanes from the PCH(P55) chipset, for a total of 24x lanes. Your also forgetting that lane splitters such as the NF200 chip to exist to provide even more lanes. Now I personally hate lane splitters, not because of what they are, but rather how they advertise them.

The 8x 1.0 lanes are however "starved" even further by the fact that they must transmit all data between the CPU and other devices via the DMI link which is a modified PCIe 1.1 4x connection.

Now, how various motherboard models implement these PCIe lanes is going to be different from board to board, its quite possible that that *particular* evga motherboard cannot do more than 16x/4x or 8x/8x/4x, but that won't be the case for every motherboard.

The P55+LGA1156+i5/i7 platform is a nice platform, however, unlike other platforms(such as X58) it is a dead end, you can only do so much before you start hitting brick walls.
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Old September 8, 2009, 11:33 AM
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Yeah I'd like to avoid the NF200 chip and the heat and latency it brings and to be honest, would do x58 if I really wanted that many lanes in the first place.. it just seems like the P55 needs 1 or 2 more to be able to encompass a bigger selection of parts

Well.. we'll see what happens with the 58xx. I do hope somebody tests it in a 8x configuration to see if it hurts its performance
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Old September 8, 2009, 01:59 PM
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There you go.

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