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View Full Version : 3870 in Crossfire under 16x and 4x PCIe

chariot
11-24-2007, 10:13 AM
I've got a DQ6 Rev2.0 Motherboard, where one slot is 16x and one 4x. I've got a C2D E6600 CPU @ 3.0 GHZ, and 4GB DDR2 @ 667MHz / 4-4-4-12.

GFX OC: 850GPU and 2600VDIMM

3dmark06:
Score with one card: 11 000 pts
Score with two cards: 13 000 pts.

Anyone know what the huge bottleneck is?
jimmyz
11-24-2007, 10:18 AM
yeah it is in the thread title .....x4.
chariot
11-24-2007, 10:35 AM
Can you recommend a perfect mainboard for my configuration?
Greets. Chariot
RickCain
11-24-2007, 10:48 AM
Can you recommend a perfect mainboard for my configuration?
Greets. Chariot

Asus Maximus Formula

http://i7.photobucket.com/albums/y255/rickcain/Computer%20Stuff/100_1340.jpg
Rattle
11-24-2007, 11:10 AM
hows the onboard sound with that mobo compared to an audigy 2zs
chariot
11-24-2007, 11:23 AM
Not to be too picky, but I've had occational bad experience with Asus and decided never to buy anything from them again, so any alternatives to Asus boards?

Gigabyte GA-X38-DS5, X38, Socket-775, ATX, GbLAN, DDR2, 2xPCI-Ex(2.0)x16 <- maybe? (its the cheapest with PICe 2.0 I could find)
HousERaT
11-24-2007, 01:03 PM
also the bottleneck is the processor running at 3Ghz. That coupled with the 16/4 is killing you. I'm also currently running 16/4 but my scores are much higher because of my cpu.
chariot
11-24-2007, 01:59 PM
So what kind of system are you running, and how are youre OC settings?
Ourasi
11-27-2007, 08:16 PM
I have a P965 DQ6 rev. 1.0 16x/4x and 2xHD3870 840/2400 Q6600@3.33ghz and scores 17100 points in 3Dmark 2006. So the "old" DQ6 is not to bad after all. But, still, a P35 with 8x/8x or a x38 with 16x/16x PCI-E 2.0 is the way to go to get the most out of a crossfire system!
DMH
12-07-2007, 12:25 PM
I have a P965 DQ6 rev. 1.0 16x/4x and 2xHD3870 840/2400 Q6600@3.33ghz and scores 17100 points in 3Dmark 2006. So the "old" DQ6 is not to bad after all. But, still, a P35 with 8x/8x or a x38 with 16x/16x PCI-E 2.0 is the way to go to get the most out of a crossfire system!

P35 is 16X/4X;)
Ourasi
12-07-2007, 01:47 PM
P35 is 16X/4X;)

Not all of them, Asus Blitz Extreme P35 have 8x/8x. But, is hard to find these days. Still, not all P35 is 16x/4x as I said....