Crossfire - What are the rules?

1933 Poker · Nov 13, 2009

inferKNOX said:
Huh? I'm not following, what's not supported in Vista, quad crossfire?

Thanks for the help, but I'm afraid JrRacinFan & wolf beat you to it.
I have always understood the concept (have been a technician for decade, but am no modder... well wasn't anyway, but things are changing), but never seen a... efficient way to splice the slave PSU upon boot w/o having to manually do it.
It's my first time seeing the ATX extenders, never had seen a female ATX connector before today.

I don't know what you are on about I have technified since 1992 so there buddy. Anyway you only mentioned to ask of multigpu as quad crossfire is already parallel. :banghead:

inferKNOX · Nov 13, 2009

1933 Poker said:
I don't know what you are on about I have technified since 1992 so there buddy. Anyway you only mentioned to ask of multigpu as quad crossfire is already parallel.

You're still losing me?
I was just saying I understand how it works thanks, but just never saw the adapter before, that's all, not saying you don't know or anything.

I don't understand what you mean by: "...you only mentioned to ask of multigpu as quad crossfire is already parallel." If you mean I referred to crossfire as quad only, that's because I was asking about a setup that draws more power than most singular power supplies provide, not because I don't know that there is dual, triple and quad options. Thanks though.

"Born"_*Leader** · Nov 14, 2009

Ya he beeee goooooooooodd..

Mussels · Nov 14, 2009

when crossfiring non-identical cards, the GPU core must match.

EG, a 4870 and 4850 can crossfire - but a 4670 and a 4850 wont work.
There was a convenient graph on page 1 that listed this.

Brands dont matter, but it can help - we have had cases of people with certain models not working in crossfire (most were gigabyte, they flashed the BIOS to fix them)

the amount of video memory available is the lowest common denominator. 1GB card + 512MB card = 512MB video ram. they do NOT add up!
SLI is the same in this regard.

Always put the fastest card in the primary slot, that way in games that dont work well in crossfire, the fastest card is doing the work.

1933 Poker:
Quad crossfire does work in vista. its XP that it wont work on.

Also, you've "techsomethinged" since 1992. good work - i've been doing it since the 80's, and some here have done it longer. Skill and time spent with hardware do not have a linear relationship.

asking for advice then arguing every step of the way seems counter intuitive.

Zubasa · Nov 14, 2009

Wrigleyvillain said:
Thanks. Finally a simple and sensical explanation of the "memory halving" situation with cards with differing amount of vram. Knew there had to be one just never came across before. Would have loved to keep one of my 4850s with my 4870 1GB but they were only 512s and I needed more VRAM for 1920x1200.

So this is not the case with SLI? Now curious...

In SLI, everything must be the same except the memory size.
So a GTX 285 + 260 SLI simply don't work.
It used to have problems when a OC edition card is paird with a standard card, or even different Bios give problems.
Not sure if thats resolved by now.

phobias23 · Dec 4, 2009

it is better this crossfire or just the hd5970

I have a sapphire hd 4870x2,can i make a crossfire with a hd 4870 512mb or a 1gb?? it would be better to mount one hd5970???

cadaveca · Dec 4, 2009

phobias23 said:
I have a sapphire hd 4870x2,can i make a crossfire with a hd 4870 512mb or a 1gb?? it would be better to mount one hd5970???

4870 1gb or another 4870x2 would be the best match. Tri-fire seems to have the best returns, from my experience.

One 5970 would = 4x4870, with less driver overhead. But as of late, I have noticed that alot of benches posted @ 950mhz on 5870, are slower than my own 4890, and my 4870 pairs, at the same gpu speeds, but with 5870 have greater memspeed. This tells me 5xxx-gen needs LOTS of driver work, and the 5970, even more so.

wolf · Dec 4, 2009

cadaveca said:
...But as of late, I have noticed that alot of benches posted @ 950mhz on 5870, are slower than my own 4890...

Say whaaaaaat? where are these benches posted?

Zubasa · Dec 4, 2009

wolf said:
Say whaaaaaat? where are these benches posted?

+1 I would love to see a 5870 with a P4 also

cadaveca · Dec 5, 2009

wolf said:
Say whaaaaaat? where are these benches posted?

Reading skills...PAIRS

cadaveca said:
4890, and my 4870 pairs

heh. Or maybe I coould explain better? nah...that's not it.. :eek:

So, yeah, slower than my pair of 4890's, slower than my pair of 4870's, given the same clockspeeds. Just take a look at the 5xxx bench thread...noone has topped 16k in Vantage... :confused:

I'm not even pushing big cpu speeds either.

My bench:
http://service.futuremark.com/compare?3dmv=1511120

Bench thread for 5xxx:

http://forums.techpowerup.com/showthread.php?t=106238

:toast:

phobias23 · Dec 6, 2009

to cadaveca

thanks for your help, i just was wondering what to cuz i dont want to throw out my money,i just bought the hd4870x2 on march09. :nutkick:

System Name	EXPENSIVE RELATIVE (ROADRUNNER) 0001
Processor	Core2 @ 6.25Ghz
Motherboard	Gigabyte GA-X48-DS5 CrossFireX
Cooling	Zalman CNPS 9700 Blue LED / Zalman VF830 GPU
Memory	8GB Kingston HyperX DDR2 1066MHz 5-5-5~18
Video Card(s)	ATI HD4870 + Nvidia 9800GTX+ PhysX
Storage	80GB Seagate, 500GB GAMER
Display(s)	22" LG W2252TQ + 15" Viewsonic VG510S
Case	Goldfield
Audio Device(s)	HD Audio 100%
Power Supply	750Watts PC Power & Cooling Blue Quad OCZ Manu
Software	Windows 7 Ultimate Build 7100 x64
Benchmark Scores	Superclocked an E7300 on a P43 at 4.15GHz. Booted at 6.25Ghz.

System Name	inferKNIGHT
Processor	Intel Core i5-4590
Motherboard	MSI Z97i Gaming AC
Cooling	Corsair H100i
Memory	2 x 4GB DDR3-1866 Crucial Ballistix Tactical Tracer (R/G)
Video Card(s)	ASUS GTX 970 STRIX 3.5GB (+0.5GB? o.O)
Storage	1 x 256GB Cricial M550, 1 x 2TB Samsung 7200.12
Display(s)	Samsung SyncMaster T260
Case	Corsair Obsidian 250D
Power Supply	Corsair RM750
Software	Windows 8.1.1 pro x64

System Name	Rainbow Sparkles (Power efficient, <350W gaming load)
Processor	Ryzen R7 5800x3D (Undervolted, 4.45GHz all core)
Motherboard	Asus x570-F (BIOS Modded)
Cooling	Alphacool Apex UV - Alphacool Eisblock XPX Aurora + EK Quantum ARGB 3090 w/ active backplate
Memory	2x32GB DDR4 3600 Corsair Vengeance RGB @3866 C18-22-22-22-42 TRFC704 (1.4V Hynix MJR - SoC 1.15V)
Video Card(s)	Galax RTX 3090 SG 24GB: Underclocked to 1700Mhz 0.750v (375W down to 250W))
Storage	2TB WD SN850 NVME + 1TB Sasmsung 970 Pro NVME + 1TB Intel 6000P NVME USB 3.2
Display(s)	Phillips 32 32M1N5800A (4k144), LG 32" (4K60) \| Gigabyte G32QC (2k165) \| Phillips 328m6fjrmb (2K144)
Case	Fractal Design R6
Audio Device(s)	Logitech G560 \| Corsair Void pro RGB \|Blue Yeti mic
Power Supply	Fractal Ion+ 2 860W (Platinum) (This thing is God-tier. Silent and TINY)
Mouse	Logitech G Pro wireless + Steelseries Prisma XL
Keyboard	Razer Huntsman TE ( Sexy white keycaps)
VR HMD	Oculus Rift S + Quest 2
Software	Windows 11 pro x64 (Yes, it's genuinely a good OS) OpenRGB - ditch the branded bloatware!
Benchmark Scores	Nyooom.

Processor	Core i7-12700k
Motherboard	Z690 Aero G D4
Cooling	Custom loop water, 3x 420 Rad
Video Card(s)	RX 7900 XTX Phantom Gaming
Storage	Plextor M10P 2TB
Display(s)	InnoCN 27M2V
Case	Thermaltake Level 20 XT
Audio Device(s)	Soundblaster AE-5 Plus
Power Supply	FSP Aurum PT 1200W
Software	Windows 11 Pro 64-bit

System Name	Phobias23
Processor	Core i5 2500K
Motherboard	Asus Maximus IV Gene-Z/GEN3
Cooling	CM 212 EVO
Memory	G.SKILL SNIPER 8GB/1866
Video Card(s)	MSI GTX 570 TwinFrozr III OC/PE
Storage	WD250gb/Hitachi1TB/Samsung750gb
Display(s)	Asus 23 led
Case	Corsair Carbide 500R white
Power Supply	Corsair TX850
Software	w7x64

Crossfire - What are the rules?

1933 Poker

New Member

inferKNOX

"Born"_*Leader**

New Member

Mussels

Freshwater Moderator

Zubasa

phobias23

New Member

cadaveca

My name is Dave

wolf

Performance Enthusiast

Zubasa

cadaveca

My name is Dave

phobias23

New Member

System Name	MightyX
Processor	Ryzen 5800X3D
Motherboard	Gigabyte X570 I Aorus Pro WiFi
Cooling	Scythe Fuma 2
Memory	32GB DDR4 3600 CL16
Video Card(s)	Asus TUF RTX3080 Deshrouded
Storage	WD Black SN850X 2TB
Display(s)	LG 42C2 4K OLED
Case	Coolermaster NR200P
Audio Device(s)	LG SN5Y / Focal Clear
Power Supply	Corsair SF750 Platinum
Mouse	Corsair Dark Core RBG Pro SE
Keyboard	Glorious GMMK Compact w/pudding
VR HMD	Meta Quest 3
Software	case populated with Artic P12's
Benchmark Scores	4k120 OLED Gsync bliss