Pair of 3870x2's not in Crossfire?

Bytor · Oct 29, 2008

I just installed a pair of 3870x2's, replacing the 3-3870's in my sig rig. Everything installed great but they won't go into crossfire. I'm using the 8.10 drivers, and yes the crossfire bridge is installed.

Anyone have any idea's what I could do to fix this problem?

Thanks

MKmods · Oct 29, 2008

nothing useful to add. Except you say 3-3870s but the sig says 2.

JrRacinFan · Oct 29, 2008

Try rolling back to 8.2 cats. From there I am unsure. Possibly CAT AI is disabled?

Bytor · Oct 29, 2008

MKmods said:
nothing useful to add. Except you say 3-3870s but the sig says 2.

Sorry that below is my Intel rig. Look under system spec's...

mullered07 · Oct 29, 2008

ok make sure you follow THISguide EXACTLY, i didnt and my CF wouldnt work then when i took the time and i did, it worked straight away. Oh and be sure to set Catalyst AI to standard, dont disable it or set to advanced as im sure that will disable cf

i wouldnt reccomend going back to 8.2 cats there way to old and am sure some improvments have been made for the 3870 series since.

follow the above steps, sticking to the guide completely and tell us how you get on :toast:

MKmods · Oct 29, 2008

so does the mobo have a setting in the bios for the bandwidth of the PCI X slots. Have you tried the lower card in a different slot?(using the blue slots?)

Bytor · Oct 29, 2008

MKmods said:
so does the mobo have a setting in the bios for the bandwidth of the PCI X slots. Have you tried the lower card in a different slot?(using the blue slots?)

I think it does have a setting for that, but will have to look. Both cards are in the blue slots, but have not tried moving to diff. slots yet.

Mullered07 I'll give that a look..

Thanks all..

Bytor · Oct 30, 2008

Not sure what I did but crossfire is working great now...

I did end up dicking around to much in bios that I had to reset it, but then the damn thing wouldn't boot. I found out that resetting the bios disables ACC in AOD so my overclock settings wouldn't work anymore..

But all is well now...

Thanks everyone for your help...

Peace...

MKmods · Oct 30, 2008

congrats and have fun

Bytor · Oct 30, 2008

I'm getting worse results than with a pair of single 3870's....

Do you think they could be bottlenecking my 9850 Phenom?

MKmods · Oct 30, 2008

it sounds like the bandwidth is wrong on the slots (X16 slot running at X4 or 1). Have you tried them 1 at a time yet?

There may be a bit of bottleneck but not like that.

JrRacinFan · Oct 30, 2008

Guys, I am leaning towards power supply? What else does everyone else think?\

EDIT: I mean, you are running one heck of a watercooling loop in that awesome rig Bytor.

Bytor · Oct 30, 2008

JrRacinFan said:
Guys, I am leaning towards power supply? What else does everyone else think?\

EDIT: I mean, you are running one heck of a watercooling loop in that awesome rig Bytor.

I'm wondering that to JrRacinFan... I didn't know if this 700 watt PSU would be able to handle everything, but I was running 3 single 3870's ok. Maybe that one extra core put it over the top... I think these 3870x2's draw a lot more power than a 3870...

MKmods · Oct 30, 2008

what PS is it?
(still think its a bandwidth/driver thing) By the way did you un install/re install the driver with the new cards? I had a LOT of driver probs when I used a 3870X2.

Bytor · Oct 30, 2008

Well I pulled the second card out and played a little Far Cry 2 and ran 3DMark06 and got the same score with one 3870x2 as I did with 2.

Wonder if its the PSU now....

Bytor · Oct 30, 2008

This one...

http://www.newegg.com/Product/Product.aspx?Item=N82E16817189009

cloudbaby · Oct 30, 2008

power ~~~

if you want go into crossfire i think you may user the big power and it must have

SIX and Eight pin . if you not have full power you can not crossfire

..... - -||| i think

jaggerwild · Oct 30, 2008

crossfire 2X 3870X2

Make sure you have Net Frame work set up correctly for that operating system, also when switching crossfire you have to reboot.

Your PSU is way to weak for two 3870X2 they are listed over @XS forums as pulling a killowatt of power.

First posting :rockout:

Andy_007 · Oct 30, 2008

Maybe try running 1 X2 and the 2 3870's from your Intel and see if you get the same problem.

Flyordie · Oct 30, 2008

HD3870X2 had crappy support from the beginning. A friend on Rage3D (JZL) has that same card and almost utterly hates it because it sucks with FSX. For him Cat 8.3s do better.

Bytor · Oct 30, 2008

jaggerwild said:
Make sure you have Net Frame work set up correctly for that operating system, also when switching crossfire you have to reboot.

Your PSU is way to weak for two 3870X2 they are listed over @XS forums as pulling a killowatt of power.

First posting

I'm driving right now, but a chart I have at home shows the newer cards and list power draws and it shows the 3870x2 pulling 130 watts at load..

Welcome to TPU also

jaggerwild · Oct 30, 2008

Bytor said:
I'm driving right now, but a chart I have at home shows the newer cards and list power draws and it shows the 3870x2 pulling 130 watts at load..

Welcome to TPU also

So with everything you have in that system........ Whats the rule of thumb when it comes to PSU? Better to have to much than not enough!

Thank you for the welcome! :toast:

Bytor · Oct 30, 2008

jaggerwild said:
So with everything you have in that system........ Whats the rule of thumb when it comes to PSU? Better to have to much than not enough!

Thank you for the welcome!

I agree.....I may still add a Thermaltake W0157RU 450W just for the Video Cards.
http://www.newegg.com/Product/Product.aspx?Item=N82E16817153069

I was messing around trying diff. cards with eachother and found that I get the best performance with a 3870 in the top blue slot as the main card and a 3870x2 in the bottom blue slot.
This setup is running with my Sig Rig 700 watt PSU with no issues.
I did have the cards powered alone off of a 2nd PSU to see if there was any gain from the extra power, but I noticed no diff. from them being powered by my 700 watt PSU in my rig.

This setup at stock GPU and memory speeds out performs the 3-3870's I was running together in the same rig.

Thank you everyone for all your help and replys....

jaggerwild · Nov 1, 2008

Are you using the X38 board? Is that board a crossfire-X ready? I think 16X2 or 16X1?

eidairaman1 · Nov 1, 2008

sounds like the powersupply then, and also XClio, never heard of them.

System Name	"The Dark Spider"
Processor	AMD Phenom 9850 @ 3.0
Motherboard	Asus M3A79-T
Cooling	Water: CPU and GPU's, 2 pumps, 2 BIX Rads, D-Tek Fuzion v1, 2 Swiftech MCW60
Memory	4 gigs Crucial Balistix Tracers (1066 @ 1256)
Video Card(s)	Sapphire 4870x2
Storage	WD SATA 640 Gig HDD
Display(s)	Acer 24" beast...
Case	Modded Rocketfish
Audio Device(s)	Onboard (only use head phones)
Power Supply	700 watt
Software	a bunch
Benchmark Scores	3D Mark 06: 9859 on 2-X1950 pro's Xfire 3D Mark 06: 12794 on 1-3870 3D Mark 06: 16484 Xfire

System Name	Crossflow III
Processor	AMD 965 (4.04Ghz)
Motherboard	Asus Crosshair III
Cooling	Air
Memory	4 gigs Mushkin 7-7-7-20@1T
Video Card(s)	single 9800GT
Storage	Raptor 150's in Raid0
Display(s)	LG Flatron 24"
Case	Custom
Audio Device(s)	AuzenTech X-Raider W/OP637
Power Supply	Custom modded Corsair 750HX
Software	Win 7 64/Solaris Utility
Benchmark Scores	3DMark06--21963 so far

System Name	Dual Build Streamer
Processor	Ryzen 7900x3d : Ryzen 4600G
Motherboard	AsRock B650E Steel Legend : Giga B450i Aorus
Cooling	Custom Water 1x420 : Stock
Memory	32GB T-Force Deltas : 16GB Dominator Platinums
Video Card(s)	PowerColor 7900 XTX Liquid Devil: iGPU
Storage	20+ TB
Display(s)	Sammy 49" 5k Ultrawide
Case	Custom White Painted Phanteks Enthoo Pro 2
Audio Device(s)	Onboard : Onboard
Power Supply	EVGA 1200W P2
Mouse	Corsair M65 RGB Elite White
Keyboard	Hyperx Origins 65
Software	Windows 10

System Name	"The Dark Spider"
Processor	AMD Phenom 9850 @ 3.0
Motherboard	Asus M3A79-T
Cooling	Water: CPU and GPU's, 2 pumps, 2 BIX Rads, D-Tek Fuzion v1, 2 Swiftech MCW60
Memory	4 gigs Crucial Balistix Tracers (1066 @ 1256)
Video Card(s)	Sapphire 4870x2
Storage	WD SATA 640 Gig HDD
Display(s)	Acer 24" beast...
Case	Modded Rocketfish
Audio Device(s)	Onboard (only use head phones)
Power Supply	700 watt
Software	a bunch
Benchmark Scores	3D Mark 06: 9859 on 2-X1950 pro's Xfire 3D Mark 06: 12794 on 1-3870 3D Mark 06: 16484 Xfire

System Name	Ma Biatch
Processor	i7 860
Motherboard	Gigabyte GA-P55-UD3A
Cooling	Noctua
Memory	8gb (4x2gb) G-Skill
Video Card(s)	GTX 470
Storage	WD5000aaks raid0
Display(s)	Sony Bravia 37" 1080p
Case	CM 690
Audio Device(s)	Onboard
Power Supply	Corsair HX520
Software	Windows 7 Ultimate

Processor	5930K
Motherboard	MSI X99 SLI
Cooling	WATER
Memory	16GB DDR4 2132
Video Card(s)	EVGAY 2070 SUPER
Storage	SEVERAL SSD"S
Display(s)	Catleap/Yamakasi 2560X1440
Case	D Frame MINI drilled out
Audio Device(s)	onboard
Power Supply	Corsair TX750
Mouse	DEATH ADDER
Keyboard	Razer Black Widow Tournament
Software	W10HB
Benchmark Scores	PhIlLyChEeSeStEaK

Processor	AMD Phenom X4 B50 3.4ghz
Motherboard	Asus M4A88TD-M EVO USB3
Cooling	CoolerMaster Vortex Plus
Memory	Team Group Dark 4gb 1800@9-9-9-27
Video Card(s)	Palit ATI HD 4850
Storage	1TB WD Blue, 2TB WD Green
Case	Silverstone Sugo SG02
Audio Device(s)	Onboard with Logitech X-530
Power Supply	Silverstone Modular 500w
Software	Window 7 Ulimate X64

System Name	Budget AMD System
Processor	Threadripper 1900X @ 4.1Ghz (100x41 @ 1.3250V)
Motherboard	Gigabyte X399 Aorus Gaming 7
Cooling	EKWB X399 Monoblock
Memory	4x8GB GSkill TridentZ RGB 14-14-14-32 CR1 @ 3266
Video Card(s)	XFX Radeon RX Vega₆⁴ Liquid @ 1,800Mhz Core, 1025Mhz HBM2
Storage	1x ADATA SX8200 NVMe, 1x Segate 2.5" FireCuda 2TB SATA, 1x 500GB HGST SATA
Display(s)	Vizio 22" 1080p 60hz TV (Samsung Panel)
Case	Corsair 570X
Audio Device(s)	Onboard
Power Supply	Seasonic X Series 850W KM3
Software	Windows 10 Pro x64

System Name	PCGOD
Processor	AMD FX 8350@ 5.0GHz
Motherboard	Asus TUF 990FX Sabertooth R2 2901 Bios
Cooling	Scythe Ashura, 2×BitFenix 230mm Spectre Pro LED (Blue,Green), 2x BitFenix 140mm Spectre Pro LED
Memory	16 GB Gskill Ripjaws X 2133 (2400 OC, 10-10-12-20-20, 1T, 1.65V)
Video Card(s)	AMD Radeon 290 Sapphire Vapor-X
Storage	Samsung 840 Pro 256GB, WD Velociraptor 1TB
Display(s)	NEC Multisync LCD 1700V (Display Port Adapter)
Case	AeroCool Xpredator Evil Blue Edition
Audio Device(s)	Creative Labs Sound Blaster ZxR
Power Supply	Seasonic 1250 XM2 Series (XP3)
Mouse	Roccat Kone XTD
Keyboard	Roccat Ryos MK Pro
Software	Windows 7 Pro 64

Pair of 3870x2's not in Crossfire?

New Member

Case Mod Guru

Served 5k and counting ...

New Member

Case Mod Guru

New Member

New Member

Case Mod Guru

New Member

Case Mod Guru

Served 5k and counting ...

New Member

Case Mod Guru

New Member

New Member

New Member

New Member

New Member

The Exiled Airman