ati crossfire/motherboard question - Techist - Tech Forum

Go Back   Techist - Tech Forum > Computer Hardware > New Systems | Building and Buying
Click Here to Login
Closed Thread
 
Thread Tools Display Modes
 
Old 10-07-2008, 06:12 PM   #1 (permalink)
Newb Techie
 
Join Date: Sep 2008
Location: Katy, TX
Posts: 15
Default ati crossfire/motherboard question

I needed to start a new thread about my computer upgrades b/c i felt i got all the answers from the old one.

Question about compatibility + recommendations

My only remaining concern is about motherboards and trying to figure out exactly what I should get for exactly what I plan on doing.

It comes down to this:
-AM2/AM2+ compatible
-SATA 300/IDE connections
-PCIe 2.0 x16 (at least 2 slots for crossfire)

Now for the most part, the only thing I'm really scratching my head over is the whole deal with video cards in crossfire. I will only have one in there at first, running at x16 as I would suspect. I do plan on adding a second card within 6 months or so.

However, every 2 slot PCIe 2.0 x16 motherboard i see says that using the 2 slots makes the 2 video cards run x8 by x8.

So my question is: Should I get a motherboard that'll let me run 2 video cards both at x8, or would getting a motherboard with say 3-4 slots that'll let me run 2 video cards at x16 be that much better in comparison.

Either way, it'll probaly run the same no matter what mobo I get with the one card running.

Are there better options then:
http://www.newegg.com/Product/Produc...82E16813130136
since it'll let me run 2 cards at x16 in the future

or

Newegg.com - BIOSTAR TFORCE TA790GX3 A2+ AM2+/AM2 AMD 790GX HDMI ATX AMD Motherboard - AMD Motherboards
as i've been told it's a better motherboard than the MSI one.

I'm really in the dark on this one so please feel free to give suggestions or comments so that I can get these upgrades ordered asap =P

cost = less than $175ish =P
__________________

missilekt7 is offline  
Old 10-07-2008, 07:30 PM   #2 (permalink)
Junior Techie
 
Join Date: Oct 2008
Posts: 54
Default Re: ati crossfire/motherboard question

I'm not really familiar with the amd chipsets but with intel boards when you use the p45 chipset the second video card goes to x8. Since the card isn't using the full 16x anyways there is only a slight drop of a few percent in performance.

So although there will be a drop on boards that go to x8 it probably won't be noticeable.
__________________

alvoss is offline  
Old 10-07-2008, 07:35 PM   #3 (permalink)
Techie Beyond Description
 
veg1992's Avatar
 
Join Date: Dec 2006
Posts: 19,993
Default Re: ati crossfire/motherboard question

You are completely set on AMD?

Newegg.com - DFI LANPARTY DK 790FX-M2RS AM2+/AM2 AMD 790FX ATX AMD Motherboard - AMD Motherboards
and
Newegg.com - 790gx

But Intel is better performance currently
__________________
I do not accept help requests and/or deleted threads/complaints by PM, Profile or IM/Email. Just ask on the forums! Also, I do have Lockerz invites if you want them, feel free to PM me your email if you want one :0

If I help you, or you just like what I said, rep me by clicking the
or under my avatar; it helps me know that my advice actually helped you.


.. But things don't go according to plan! My Actual Rig, 2009:
veg1992 is offline  
Old 10-07-2008, 08:08 PM   #4 (permalink)
Newb Techie
 
Join Date: Sep 2008
Location: Katy, TX
Posts: 15
Default Re: ati crossfire/motherboard question

Quote:
Originally Posted by alvoss View Post
I'm not really familiar with the amd chipsets but with intel boards when you use the p45 chipset the second video card goes to x8. Since the card isn't using the full 16x anyways there is only a slight drop of a few percent in performance.

So although there will be a drop on boards that go to x8 it probably won't be noticeable.

so basicly, running two 512mb PCIe 2.0 x16 cards in crossfire at 8x by 8x is the same as running one duel core video card with 1gb of video memory?



Quote:
Originally Posted by vernong1992 View Post
You are completely set on AMD?

Newegg.com - DFI LANPARTY DK 790FX-M2RS AM2+/AM2 AMD 790FX ATX AMD Motherboard - AMD Motherboards
and
Newegg.com - 790gx

But Intel is better performance currently
Well I've always been an AMD guy, most likely because at the times of my upgrades/new computers, they've been on top. But other than that, I guess I'm am open to Intel as long as the performance/price is comparable.

So if that's the case, I would have to rethink both my motherboard and CPU choices, CPU choice as follows:

Newegg.com - AMD Athlon 64 X2 5400+ Brisbane 2.8GHz 2 x 512KB L2 Cache Socket AM2 65W Dual-Core black edition Processor - Processors - Desktops

The other thing that is swaying me towards this CPU is the combo deal with:

Newegg.com - Rosewill RX750-S-B 750W ATX12V v2.2 & EPS12V v2.91 SLI 8800GTX SLI CrossFire Ready Active PFC PFC Power Supply - Power Supplies
missilekt7 is offline  
Closed Thread

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
*Updated* Laptop Graphics Cards Ranking List veg1992 Laptops and Notebooks 98 12-05-2015 10:24 PM
Leak: ATI Radeon 4800 Gets 480 Steam processors TheOtis New Technology and Products 37 05-06-2008 04:42 AM
Ati Drivers VS Nvidia Drivers Whirlwind New Systems | Building and Buying 5 03-09-2008 09:03 AM
Using and ATi videocard with a nVidia chipset? BiGyLiLuPdAmIdL System Upgrades 7 12-30-2007 06:04 PM
Power Supply Question + Overclocking Question Grievearz New Systems | Building and Buying 21 09-12-2007 12:59 AM



Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -5. The time now is 01:29 PM.


Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2017, vBulletin Solutions, Inc.