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AMD Quad-CrossFire - CrossFireX Performance

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I just found this, I figured I would post it so everyone can see it.
Source

2 Cards
Dual Radeon HD 3870 X2 config - Four GPUs


4 Cards
Dual Radeon HD 3870 and Dual Radeon HD 3850 config - Four GPU


Specs:
AMD Phenom 9900 @ 2.6 GHz,
MSI 790 FX
2GB Corsair DDR2-800 memory
Single Raptor 150GB hard drive
Windows Vista x64
Beta driver revision that AMD provided


Call of Duty 4 Benchmarks







Crysis 1.1



3dMark06 Default Settings


3dMark06 SM3.0


------------------------
Specs:
CPU AMD Phenom @ 2.6GHz
Motherboard MSI K9A2 Platinum
Video Cards ATI Radeon HD 3870 X2
ATI Radeon HD 3870
Video Drivers Catalyst 8.1 (Modified for CrossFireX Support)
Hard Drive Seagate 7200.9 300GB 8MB 7200RPM
RAM 2x1GB Corsair XMS2 DDR2-800 4-4-4-12
Operating System Windows Vista Ultimate 64-bit

ATI Radeon HD 3870 CF Scaling


Configuration
------Configuration------------------HL2----UT3-----Bioshock-----CoD4----Crysis
2-way CF Improvement over 1 card-__83%___80%_____71%______98%_____87%
3-way CF improvement over 2 cards-_30%____34%_____37%______44%_____0%
4-way CF improvement over 3 cards-_10% ____3%______7%______29%_____4%
4-way CF improvement over 1 card-_160% __150%____151%_____268%____98%

3870 & 3850


Hope This Helps!!! :toast:
 
Last edited:

cdawall

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im getting 4 3850s :D and hopefully a 9750 95w
 
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im getting 4 3850s :D and hopefully a 9750 95w

i'm jealous :cry:

once i get my 9850, i'm going wait about 6-8 months and get a 4k card (4870) then wait a couple more months, when they start dropping like crazy and getting another one. :D
 

cdawall

where the hell are my stars
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Memory 4x16GB G.Skill 3600
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i'm waiting for the 4xxx to come out so i can get the 3850s for nothing :D
 

cdawall

where the hell are my stars
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Memory 4x16GB G.Skill 3600
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None of the graphs show the 2 x 3870 + 2 x 3850 combo's?
 
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Benchmark Scores Don't do them anymore.
can i have it!:eek:
 
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Wow those sure are some pretty configurations!!! Me wan't me wan't (How would you get sound if all slots are blocked? Sorry never had touched a PCI-E card) It costs alot here to have that kind of set-up and boy I bet those would knock my eyes off its socket for the gfx !!
 

cdawall

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easy there tiger, better get the first two paid off first :slap:

:)

lol they will be don't worry in fact i have been doing some work local @ $50/hr to run virus scans etc :p
 

cdawall

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Memory 4x16GB G.Skill 3600
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Almost makes me want to get a 9850 BE and 2 more 3870's
 
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Hey, thats my motherboard! :)


How do those 3870's get air flow?! lol, such an awesome site. I wish I had funds to get a single slot 3870. Gotta save, save!
 

cdawall

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Hey, thats my motherboard! :)


How do those 3870's get air flow?! lol, such an awesome site. I wish I had funds to get a single slot 3870. Gotta save, save!

mine too i'm buying some toxic coolers soon though and i'll just use those and make single slot 3870s :p
 
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What kind of PSU do I need if I need 4 cards like that? Bought a 3870 yesterday. If at all I install it, getting a CF board, I might buy one more card. What should be the PSU specs I should be looking at? I have a 600W Ultra SLI certified PSU. Will that be enough?
 
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I can power my OC'd system with two cards, with a Corsair HX620W. I believe peak power is somewhere around the 710W area. So I guess the first thing to find out would be if 600W for your psu is constant or peak. It also depends on how much the rest of your system depends on the PSU.
 
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what are some of the specs you have in mind?

Good CF board + Phenom 9750/9850, 4GB + 2 x 38xx series cards + everything else on my current system specs.
 
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i don't think that will be enough. and plus, if i'm right. the 3870's have a 8-pin power conntectors. And your's only has two. But you could use the the molex adapter, but you lose overdrive. And possible some performance. maybe due to lack of power.

Good CF board + Phenom 9750/9850, 4GB + 2 x 38xx series cards + everything else on my current system specs.

Then I would have to say, get a bigger psu, Those phemon are power hungry and then add 4 3870's.
 
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