Does 6870 CF has issues?

[themirror]

Hi guys, I'm currently running on a 6870 for gaming at 1366x768(My monitor is 18.5'').I am able to play almost all the games at high settings.I'm thinking of adding another in the next few weeks.I've just read somewhere that 6870CF has many problems.Is that correct? I bought a 6870 so that I can crossfire it later.If I knew about this I would have gone for 6950.Am I screwed now?

And my rig is
i5-2500k+asus p8z68 v le+GSKill ripjaws 8gb @1600mhz+sapphire hd 6870 1GB

 

[amuffin]

I don't even think your board supports crossfire/sli. Actually it doesn't, so you can't even crossfire your 6870.

 

[themirror]

But actually It does.

 

[amuffin]

v-le does not support sli and crossfire.

 

[flyboy86]

If this is your motherboard you can crossfire the 6870

http://www.asus.com/Motherboards/Intel_Socket_1155/P8Z68V_LE/#specifications

This is what it says about the pci slots

1 x PCIe 2.0 x16 (blue) *1
1 x PCIe 2.0 x16 (x4 mode, black) *1
2 x PCIe 2.0 x1
3 x PCI

If you do crossfire the other 6870 will not get as good of performance because the second PCIe slot is only running at x4

 

[amuffin]

It says he has 1 x16 slot and 1 x4 slot, the bandwith is insanely bottlenecked. Crossfiring would be a waste of money at this point.

 

[themirror]

Mine is this

http://in.asus.com/Motherboards/Intel_Socket_1155/P8Z68V_LE/#specifications

and it says the MB supports Crossfire

 

[Guest]

It says he has 1 x16 slot and 1 x4 slot, the bandwith is insanely bottlenecked. Crossfiring would be a waste of money at this point.

+1

 

[themirror]

Yes it has the second slot at x4 mode.I read that would reduce the performance by around 10%. But i don't care about that.What I want is whether 6870cf has inherent problems?

 

[amuffin]

Don't know, your board only says it supports quadfire, not regular 2 card cf.

 

[arvalin_dakaria]

Personally I run 2x Sapphire Vapor-x 6870's in CF with no issues (to include micro-stutter.)
If you're only gamming at 1366x768 though i don't think your're going to see much of a diff, why not take the $ and get a better monitor?

 

[jjtober1]

I have a pair of 6870's and am pretty satisfied. I had a pair of 5850's and they never worked right with this board for some reason, but these 6870's work very well. Any multi GPU setup is going to give you more trouble than a single GPU setup, but if you don't mind fiddling with settings and stuff they usually work well enough.

I don't know about your board, but if you do get it to work, I would recommend using RadeonPro, you can force different settings easily with it, and force other crossfire profiles if you are having problems with a certain game.

 

[arvalin_dakaria]

Don't know, your board only says it supports quadfire, not regular 2 card cf.

The Asus P8Z68-V LE supports CF with PCI-E 2.0 running 16x, 4x

 

[themirror]

Personally I run 2x Sapphire Vapor-x 6870's in CF with no issues (to include micro-stutter.)
If you're only gamming at 1366x768 though i don't think your're going to see much of a diff, why not take the $ and get a better monitor?

I'm perfectly happy playing at that resolution
So there isn't micro stutter for 687 CF

 

[arvalin_dakaria]

I'm perfectly happy playing at that resolution
So there isn't micro stutter for 687 CF

All I can say is I don't have any micro-stutter

As for your resolution, what I said is you're not going to see much of a gain @ that resolution
There isn't really anything that a single 6870 can't max @ 1366x768 so why spend another $150 for a second card?

If you're set at playing @1366x768 I'd take the $ and invest it somewhere else in your rig

 

[themirror]

With PCI E 2.0 @ 4x there might be max 15% fps loss.

 

[themirror]

All I can say is I don't have any micro-stutter

As for your resolution, what I said is you're not going to see much of a gain @ that resolution
There isn't really anything that a single 6870 can't max @ 1366x768 so why spend another $150 for a second card?

A friend offered me one at real cheap after using for 6 months. and It would make me future proof.

EDIT:And one more thing.Can I play BF3 at highest settings at that resolution with a single card?

 

[amuffin]

I dont' know some guy said he had problems: http://www.tomshardware.com/forum/298303-30-p8z68-crossfire-6950s

 

[arvalin_dakaria]

http://www.overclock.net/t/819348/16x-16x-vs-16x-4x-gtx-470-sli-comparison

I currently run 16x, 8x with my cards even though my board supports dual 8x (I haven't figured out what is wrong) If you want I can bench my rig later.

Performance loss is much closer to 10%

 

[themirror]

Best answer selected by themirror.

 

[Earnie]

crossfire 6870's are a good combo,but like others have said,at that resolution and with 4x,you wont see much of a difference.

 

[amuffin]

http://www.overclock.net/t/819348/16x-16x-vs-16x-4x-gtx-470-sli-comparison

I currently run 16x, 8x with my cards even though my board supports dual 8x (I haven't figured out what is wrong) If you want I can bench my rig later.

Performance loss is much closer to 10%

There is a 1% performance difference between 16/16 and 8/8.

 

[themirror]

Guys, thanks for the replies.