RX480 crossfire issues (BF1)

[Concker]

Hello.

I recently bought another Sapphire Nitro + RX480 card to run in crossfire.
I am however running into some issues.
When i run Heaven benchmar, firetrike etc both cards are working well at 90-100% and fps seems good.
I get a score of around 16k in firestrike.

However when i run BF1 i get 20-30fps and it laggs like crazy.
Both cards does runs fine and loads 90-100%
The cpu load is from 70-90%

Im currently running 17.2? drivers (Most recent)
So the question is that does my cpu bottleneck causing this low fps, or could it be drivers problem?
From what ive tested so far it seems that the probem is only bf1..

My specs are:

CPU: i7 2600k @ 4ghz
Ram: 16gb ddr3 1600mhz corsair vengance
MB: Asus P8P67 Deluxe
GPU: Sapphire Nitro + RX 480 x 2
psu: Corsair RX750w

[Skiiwee29]

Battlefield 1 is a very CPU intensive game, Usage on my 6700k OCd to 4.6ghz is also upwards of 90%. This is likely where the issue is honestly. I also play at 1440p native. 

[Concker]

Hm, yeah. I play on 1440p aswell. 

With one card there is no issues. Getting av avrage of 65-70fps with one card. 

But for some reason crossfire gives me 20.. However it seems to only be in bf1.. 

 

Going to download battlefront and the division atleast to se how it peforms on those titles. 

[Skiiwee29]

1 minute ago, Concker said:

Hm, yeah. I play on 1440p aswell. 

With one card there is no issues. Getting av avrage of 65-70fps with one card. 

But for some reason crossfire gives me 20.. However it seems to only be in bf1.. 

 

Going to download battlefront and the division atleast to se how it peforms on those titles. 

Its very likely that BF1 may be poorly optimzed to support Cross fire or SLI. I have a 2nd 1070 on its way to do SLI so I will see. 

[TrigrH]

try setting: "POST PROCESSING TO MEDIUM"

[Concker]

46 minutes ago, legacy99 said:

Its very likely that BF1 may be poorly optimzed to support Cross fire or SLI. I have a 2nd 1070 on its way to do SLI so I will see. 

Well, there have been alot of benchmarks of bf1 performing very well with 480 cf

[Concker]

3 hours ago, TrigrH said:

try setting: "POST PROCESSING TO MEDIUM"

Even at all settings at low i get like 40fps. One card runs at 60-70 at 1440p all on ultra 

[DragonTamer1]

Your CPU is most likely a bottleneck unfortunately. A 2600K should have no trouble keeping up with a single card but falls a bit with dual cards. It doesn't help that BF1 leans so heavily on the CPU to begin with, it is compounding the issue.

 

I would recommend disabling CF with BF1, see if you can overclock further, or get something like a 3770K that should fit the same socket (assuming BIOS supports it) or all of the above.

[Concker]

16 minutes ago, DragonTamer1 said:

Your CPU is most likely a bottleneck unfortunately. A 2600K should have no trouble keeping up with a single card but falls a bit with dual cards. It doesn't help that BF1 leans so heavily on the CPU to begin with, it is compounding the issue.

 

I would recommend disabling CF with BF1, see if you can overclock further, or get something like a 3770K that should fit the same socket (assuming BIOS supports it) or all of the above.

Hm, yeah i have ran it close to 5ghz before so can try to clock it back up and see if it helps

[DragonTamer1]

Just now, Concker said:

Hm, yeah i have ran it close to 5ghz before so can try to clock it back up and see if it helps

It's also worth noting that while PCIe 2.0 shouldn't cause a problem, having cards in CF can cause issues. Since their bus width is cut in half from 16x. AMD cards also talk to each other through the PCIe ports rather than a bridge like NVidia cards so they would most likely need a bit more bandwidth.

[smokefest]

5 hours ago, legacy99 said:

Battlefield 1 is a very CPU intensive game, Usage on my 6700k OCd to 4.6ghz is also upwards of 90%. This is likely where the issue is honestly. I also play at 1440p native. 

I have 6700k @ 4.6 ghz and gtx  1070 and cpu goes up to 90% in the worst case ive seen after 300 hours gameplay so I confirm !  

[smokefest]

2 hours ago, Concker said:

Even at all settings at low i get like 40fps. One card runs at 60-70 at 1440p all on ultra 

That is due to the fact the cpu probably is struggling to deliver the information fast enough for the GPU !!!

 

Even if you see 90% cpu usage on your monitoring app,  but it is possible it has reached 100% for a mili secoonde per example ... just saying.. is your cpu overclocked?

[smokefest]

I would try OC cpu to 4.4 something like that hope for more gains and see the benefits, not too bad if you reach high temp like 85 just to test if it helps  

[Concker]

Thanks for the answers ?

I will look into it on monday when i get home. Before i used to run at 4.8, and i know i can reach 5stable on the chip. 

 

Its all water cooled so temps aint a problem. Hopefully i can get it to work decently, while i waint for the ryzen 1600x ?

[Concker]

So i have done some more testing.
First of all i went back to the 4,8ghz overclock.

This helped a little on performance but still cpu loads are quite high (about the 75% even with only 1 card) 

So i did some testing with the division, starwars battlefront and battlefield 1.
And basically i gain 20fps in starwars, about 10 in the division and with some tweeking of the bf1 profile its about the same with 1 and 2 cards. 

So i think i will just return the extra card rather spend my money towards an Ryzen 1600x.
Mby even just go with a B350 card to keep the cost down and waint for vega

[Concker]

Hm, would an fx9590 be an alternativ to the 2600k regarding crossfire cpu usage? I found set with cpu, motherboard and watercooler super cheap used. 

 

I guess the questions is that would the 8 core fx9590 Performance better with crossfire? And in bf1 as i think that this game may use all the cores? 

 

Also i find a 4790k setup for dubble the price of the fx. But also an 3930k that is low priced.. Hmm