Crossfire producing worse FPS - Crossfire 7870's

Toggle sidebar Toggle sidebar
F

FenderGreg

Reputable
Sep 14, 2015
11
0
4,510
Hey guys,
So I have had an XFX HD7870 Black edition Overclocked (1250MHz) for a few years now. I saw an XFX 7870R DD on ebay for a decent price and thought I'd try crossfire the cards to see if I could give my graphics a little boost for a while longer.
However, I am more than sure after setting it all up that I am not getting any boost from two cards. It seems I'm getting worse!
I have used MSI Afterburner to give the second card a little boost to get it up to the original card so neither card is held back or restricted.
I've switched between crossfire and single gpu on games and have noticed better frame rates and general performance on one card!
Crossfire IS enabled and IS working according to CCC and GPU-Z. The second card does show it is active during gameplay (in fullscreen).

Both cards use the Pitcairn chip so no clash there. I'm very lost with it....

Any help would be appreciated, I know the cards are dated but I thought they still had something to prove.

PC Setup:
Asus Sabertooth 990fx r2.0
AMD FX-8350
XFX HD7870 Black Edition Overclocked
XFX R7870 DD GHz Edition
2x4Gb G.Skill 1600MHz CL9
Tagan Super Rock 880w


Greg
 
Solution
MarkW
Turn V-Sync on. That will eliminate screen tearing. Screen tearing is a result of the video card(s) sending frames to the display faster than they can draw them. So you could be seeing parts of 2 to 5 frames as a single frame. Turning v-sync on stops the video card(s) from sending more than 1 frame within the timeframe that it takes the monitor to draw the entire frame (normally 1/60th of a second).

I do not think this has much if anything to do with the age of the cards. It is more a matter of if the game designer took the time to support Crossfire or not.
Sort by date Sort by votes
A

AaronNazzy1

Reputable
Sep 30, 2015
50
0
4,640
Two things, first of all don't shop on ebay for things that are expensive especially if they're used, there is always something hidden that makes the card somewhat impaired. And second some games are just not optimized for those cards or any sli way for that matter, can you tell me how the performance is on different games?
 
Upvote 0 Downvote
MarkW

MarkW

Judicious
Dec 7, 2009
6,308
0
32,960
Upvote 0 Downvote
A

AaronNazzy1

Reputable
Sep 30, 2015
50
0
4,640


The 880W is more than enough...
 
Upvote 0 Downvote
maxalge

maxalge

Champion
Ambassador
May 31, 2012
13,373
4
56,960


IF it was 880w and was tested good

most cheap psu companies LIE


The one review I found was mediocre



 
Upvote 0 Downvote
MarkW

MarkW

Judicious
Dec 7, 2009
6,308
0
32,960


You missed the point. It is a cheap power supply that is not supplying the proper amounts of amps for an 880 watt unit.
 
Upvote 0 Downvote
F

FenderGreg

Reputable
Sep 14, 2015
11
0
4,510


Shame I'm not in the US.

I'm kind of thinking my lack of experience with crossfire has led to what I believed was poor performance.
I've tried multiple games and certainly 'newer' games respond better.
BF3 shows improvement in crossfire.
Far Cry 3 shows barely any difference.
S.T.A.L.K.E.R shows better performance with one card.
Outlast shows no difference.
Witcher 2 freaks out at crossfire.
Sniper Elite V2 there is improvement in crossfire as I'd say on average FPS was up, single ccard dips and raises fairly often.
Bioshock Infinite the game is about 50FPS better off.

I'm guessing i was a bit hasty with my original post and these are the sort of result I should expect from crossfire.
I would have thought with the amount crossfire gets talked about it would be better, but then again I'm on some older cards.

One thing i do notice is screen tearing is a bit more predominant. Whats the best way to tackle that??
 
Upvote 0 Downvote
MarkW

MarkW

Judicious
Dec 7, 2009
6,308
0
32,960
Turn V-Sync on. That will eliminate screen tearing. Screen tearing is a result of the video card(s) sending frames to the display faster than they can draw them. So you could be seeing parts of 2 to 5 frames as a single frame. Turning v-sync on stops the video card(s) from sending more than 1 frame within the timeframe that it takes the monitor to draw the entire frame (normally 1/60th of a second).

I do not think this has much if anything to do with the age of the cards. It is more a matter of if the game designer took the time to support Crossfire or not.
 
Upvote 0 Downvote
Solution
You must log in or register to reply here.

TRENDING THREADS

Latest posts

Moderators online

Share this page

COMPANY
RESOURCES
FOLLOW
Top Bottom