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x48 vs p45

post #1 of 9
Thread Starter 
Is there really any advantage of using x48 over p45? I'm debating, and price is driving my decision a good amount, but I don't want to change my board for a while, so if there is a significant advantage to x48, I want to know. It will be all the stuff in my sig rig, - the 3870 and plus a pair of 4870's.
    
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post #2 of 9
I believe the main difference is 38 vs 16 PCIe 2.0 lanes.

For your three cards, you pretty much need a X48 for the PCIe lanes. I'm not sure if there are even any three x8+ PCIe slots P45 motherboards
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post #3 of 9
I would go X48..considering you will need 16x16x

see here->
Quote:
We’ll start with the top of the range, the Intel P45 Express. Intel’s chipset names have carried the “Express” moniker ever since support for PCI Express was added, but now that it’s the de-facto baseline standard for a motherboard to offer some form of PCI Express capability, the added meaning is a little empty. What isn’t empty, however, is the new chipset’s PCI Express 2.0 capability, which may be configured in a single 16-lane interface, or two 8-lane interfaces, for tandem graphics processing.



on X48-
Quote:
The rest of the chipset design should be very familiar: PCI Express 2.0 support in the form of 32 lanes, integrated DDR3 and DDR2 memory controllers and a pairing up with the Intel ICH9 south bridge. The south bridge offers up the rest of the main feature set including support for six SATA ports with RAID options, a dozen USB channels, integrated 8-channel audio and a handful of PCIe 1.0 lanes for accessory support.
I tried to find more info on X48.. basically it supports RAID_10, 32x PCI-E lanes, Intel XMP memory profiles and 1600mhz FSB. There will much more bandwidth for 2x gpu's with more pci-e lanes.

-So far, I really like the mobo I have, over my P5K3-DLX. I have managed a 480mhz FSB with my Q6600 so far..planning on breaking through 500 soon.
post #4 of 9
For multi pice slots P45, may need to wait for Foxcoon F1 motherbarod. The prototype says that it will have 4 pcie slots.
Edited by linskingdom - 6/25/08 at 7:42am
post #5 of 9
Thread Starter 
boo, x8/x8 for 2 PCIe that's lame. I will only be running 2 cards, sorry for the confusion, but either way I'm guessing I want 2 x16, heck even my P5K Deluxe has more than that. x16/x4 I think it is.
    
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Q9650 E0 @ 4GHz (445x9) on 1.325V (bios) | ASUS Rampage Formula x48 | | BIOS 0410 | Visiontek 4870 790/1100 | 2x2GB G.Skill PI @1069MHz | 1.9V | 5-5-5-15 2T | 
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post #6 of 9
Well, if you are thinking X48 you need to decide if you are using DDR2 or 3. I have a X3350 running on a Rampage Formula and my sig'd DQ6 [both of which are X48]. I am liking this DQ6 a lot..easy as pie BIOS and rock solid. Just a little [.03v vdroop after I set vcore >1.5v]

just general testing the first day.. 'Auto' settings on all..just FSB hunting and checking voltages.. hit 486mhz FSB with my E6700. Now testing with my Q6600 at 450+ FSB.. so far, is going great, just finding the sweet spots for PL#7 and my FSBv. I am shooting for 500+ stable with the Q4.. we will see if I can do it.
post #7 of 9
Thread Starter 
it will likely be DDR2, At this stage of the game for me DDR3 just costs too much for not much return. I can run my HZ's pretty darn fast.
    
CPUMotherboardGraphicsRAM
Q9650 E0 @ 4GHz (445x9) on 1.325V (bios) | ASUS Rampage Formula x48 | | BIOS 0410 | Visiontek 4870 790/1100 | 2x2GB G.Skill PI @1069MHz | 1.9V | 5-5-5-15 2T | 
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Neat one from Body Worlds exhibit 
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CPUMotherboardGraphicsRAM
Q9650 E0 @ 4GHz (445x9) on 1.325V (bios) | ASUS Rampage Formula x48 | | BIOS 0410 | Visiontek 4870 790/1100 | 2x2GB G.Skill PI @1069MHz | 1.9V | 5-5-5-15 2T | 
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post #8 of 9
I thought P45 supports 8x8 Crossfire but X48 supports 16x16 Crossfire.
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post #9 of 9
Thread Starter 
that's what we are talking about. x8/x8 is lame, my P5K Deluxe is at least x16/x4 (that's more lanes). I really hate to splurge that much money on an x48 board, but you do what ya gotta do.
    
CPUMotherboardGraphicsRAM
Q9650 E0 @ 4GHz (445x9) on 1.325V (bios) | ASUS Rampage Formula x48 | | BIOS 0410 | Visiontek 4870 790/1100 | 2x2GB G.Skill PI @1069MHz | 1.9V | 5-5-5-15 2T | 
Hard DriveOptical DriveOSMonitor
Seagate 2x320GB 7200.10 in RAID 0 + 250GB 7200.10 Lite-On DVD+-R/RW DL Vista Ultimate x64 42" Aquous @ 1440 x 900 (1920 x 1080 is too small) 
KeyboardPowerCaseMouse
Logitech MX5500 Silverstone DA750 THE Rocketfish Logitech MX Revolution 
Mouse Pad
Neat one from Body Worlds exhibit 
  hide details  
Reply
    
CPUMotherboardGraphicsRAM
Q9650 E0 @ 4GHz (445x9) on 1.325V (bios) | ASUS Rampage Formula x48 | | BIOS 0410 | Visiontek 4870 790/1100 | 2x2GB G.Skill PI @1069MHz | 1.9V | 5-5-5-15 2T | 
Hard DriveOptical DriveOSMonitor
Seagate 2x320GB 7200.10 in RAID 0 + 250GB 7200.10 Lite-On DVD+-R/RW DL Vista Ultimate x64 42" Aquous @ 1440 x 900 (1920 x 1080 is too small) 
KeyboardPowerCaseMouse
Logitech MX5500 Silverstone DA750 THE Rocketfish Logitech MX Revolution 
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Neat one from Body Worlds exhibit 
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