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Defference in P35 and P45 chipsets

Forum Motherboards & Memory : General Motherboard - Defference in P35 and P45 chipsets

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dpavshak   10-01-2008 at 05:38:24 PM

Hello, i am looking at BOXDP35DPM. I see that it says P35 chipset. Is there much difference between the P35 and P45 to make me not want to get this board?

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huron   10-01-2008 at 06:03:04 PM
- 1 +

The major difference is PCIE 1.1 on the P35 to PCIE 2.0 on the P45. It doubles that bandwidth of the x16 slot. Honestly, from the discussions I have seen, the difference is negligible, except on high-end systems, and then it is only like 1-2%

Reply to huron
jthorn   10-01-2008 at 06:20:13 PM
- 0 +

As Huron said, PCIE 2.0 is the biggest difference. Some enthusiast might say P45 gives you a more stable overclock for those so inclined. Also, P45 does a great job supporting crossfire but that costs more. Price is not a big difference when comparing the single GPU boards. I think you can find many P45 offerings for nearly the same price as a P35 board.

Message quoted 1 times
Reply to jthorn
dagger   10-01-2008 at 06:40:19 PM
- 0 +

jthorn wrote :

As Huron said, PCIE 2.0 is the biggest difference. Some enthusiast might say P45 gives you a more stable overclock for those so inclined. Also, P45 does a great job supporting crossfire but that costs more. Price is not a big difference when comparing the single GPU boards. I think you can find many P45 offerings for nearly the same price as a P35 board.



P45 should not be used for crossfire. It throttles back to 8x in cf mode, which bottlenecks.
http://www.tweaktown.com/articles/ [...] index.html

The biggest difference is FSB. P35 runs at 1333mhz fsb natively, reliably oc to 1600mhz. P45 runs at 1600mhz fsb natively, reliably oc to 2000+mhz. That's why "Some enthusiast might say P45 gives you a more stable overclock for those so inclined," as you put it. There is a solid reason behind why they say it.

Message quoted 1 times
------------------------------ Q6600@3.6ghz, GA-EX38-DS4 motherboard, 8gb 800mhz ddr2 4-3-3-12, 8800GTS(g92)@780mhz, 1TB + 1.5TB hdds, 850watt psu
 Reply to dagger
MooseMuffin   10-01-2008 at 06:53:50 PM
- 0 +

Is there any point to getting a p45 board over a p43 one for single gpu use?

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Reply to MooseMuffin
dagger   10-01-2008 at 07:06:57 PM
- 0 +

MooseMuffin wrote :

Is there any point to getting a p45 board over a p43 one for single gpu use?



P43 use lower binned chips that don't overclock as well (still better than p35 though). Other than that, they're basically the same.

------------------------------ Q6600@3.6ghz, GA-EX38-DS4 motherboard, 8gb 800mhz ddr2 4-3-3-12, 8800GTS(g92)@780mhz, 1TB + 1.5TB hdds, 850watt psu
 Reply to dagger
jthorn   10-01-2008 at 09:48:19 PM
- 0 +

"P45 should not be used for crossfire. It throttles back to 8x in cf mode, which bottlenecks"

Thanks for this comment. Clears up a few things for me.


Message edited by jthorn on 10-01-2008 at 09:55:48 PM
Reply to jthorn
NinjaDMP   10-02-2008 at 01:29:22 AM
- 0 +

dagger wrote :

P45 should not be used for crossfire. It throttles back to 8x in cf mode, which bottlenecks.



is x38 or x48 a better option?

Message quoted 1 times
Reply to NinjaDMP
dagger   10-02-2008 at 02:32:24 AM
- 0 +

NinjaDMP wrote :

is x38 or x48 a better option?



Yes, full pcie2.0x16 in cf mode.

------------------------------ Q6600@3.6ghz, GA-EX38-DS4 motherboard, 8gb 800mhz ddr2 4-3-3-12, 8800GTS(g92)@780mhz, 1TB + 1.5TB hdds, 850watt psu
 Reply to dagger
spathotan   10-02-2008 at 03:22:10 AM
- 0 +

My P5Q did not bottleneck the 4850's in CF I used for 2 days. My scores were within 3% of the posted benchmark results using similar clocked CPU. 4870's, thats a whole different story. But being than X38 boards are as low as $150, and DFI has a good X48 for $220, obviously you would go for those over a P45 for XFire.


Message edited by spathotan on 10-02-2008 at 03:23:11 AM
------------------------------ http://valid.canardpc.com/cache/banner/547515.png
Intel Xeon X3370 @3.6ghz Under Enzotech Extreme-X,EVGA GTX 285 SC, 4GB Mushkin Ascent eVCI @ 1066mhz, Gigabyte P45 UD3P
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