780 x 2 possible with this PC?

LtMatt · 21 Mar 2014 at 18:12

Kaapstad said:
So why is Mantle making DX11 look silly when it comes to smoothness and improvements in minimum fps.

Geeman1979 said:
I get bad Gpu usage in BF4 in SLI with a pair of 780's and a 3960X at 4.8

Cards dropping to 60% at times.

Happens in DX with 290 cards in crossfire as well sometimes Geeman at 1080P, even with my i7 at 5ghz. Not an issue at 1440P so much on DX.

On Mantle you find its pegged at 100% solid usage on each gpu constantly regardless of resolution used and even with my cpu at 4ghz. I'm hopeful that we'll be saying the same about DX12 in 1-2 years time.

Angst · 21 Mar 2014 at 18:12

Geeman1979 said:
To be honest, it runs better on one card for me than two. Gpu usage with one card at a constant 99% usage. Frames i'll have a check next time I run it.

Then that doesn't sound like cpu issue but a game or driver issue as the fps would be just as bad if it was the cpu.

Geeman1979 · 21 Mar 2014 at 18:17

LtMatt said:
Happens in DX with 290 cards in crossfire as well sometimes Geeman at 1080P, even with my i7 at 5ghz. Not an issue at 1440P On Mantle you find its pegged at 100% solid usage on each gpu constantly regardless of resolution used and even with my cpu at 4ghz. I'm hopeful that we'll be saying the same about DX12 in 1-2 years time.

Interesting!

So this is a game issue or a DX issue? So far i'm not convinced. Will test this Mental Mantel business out when I get my 290X back from RMA.

LtMatt · 21 Mar 2014 at 18:23

Geeman1979 said:
Interesting!

So this is a game issue or a DX issue? So far i'm not convinced. Will test this Mental Mantel business out when I get my 290X back from RMA.

Its an API issue im afraid and only happens when you have more than one gpu. Saw it on my 7950's with my i7, saw it on my 7990 with my i7 and now with my 290's. Saw it on BF3 as well to be fair, but not quite as bad. Its worrying that it can happen to you with that cpu though, you'd think it would be beyond that due to the extra cores/threads.

Shame you don't have crossfire, think you'd be in for a nice surprise with crossfire on Mantle with a 6 core cpu.

Angst · 21 Mar 2014 at 18:25

Strangely matt cleans up a thread rather than derailing it.

Geeman1979 · 21 Mar 2014 at 18:27

LtMatt said:
Its an API issue im afraid and only happens when you have more than one gpu. Saw it on my 7950's with my i7, saw it on my 7990 with my i7 and now with my 290's. Saw it on BF3 as well to be fair, but not quite as bad. Its worrying that it can happen to you with that cpu though, you'd think it would be beyond that due to the extra cores/threads.

Shame you don't have crossfire, think you'd be in for a nice surprise with crossfire on Mantle with a 6 core cpu.

You are correct. It wasn't as bad in BF3. What's that scaling setting in BF4 all about. I know if I raise that, Gpu usage goes up?

Angst · 21 Mar 2014 at 18:28

Geeman1979 said:
You are correct. It wasn't as bad in BF3. What's that scaling setting in BF4 all about. I know if I raise that, Gpu usage goes up?

Thats resolution its rendered at essentially then scaled down to your monitor.

whyscotty · 21 Mar 2014 at 18:28

Geeman1979 said:
You are correct. It wasn't as bad in BF3. What's that scaling setting in BF4 all about. I know if I raise that, Gpu usage goes up?

What res are u using Gee?

LtMatt · 21 Mar 2014 at 18:29

Geeman1979 said:
You are correct. It wasn't as bad in BF3. What's that scaling setting in BF4 all about. I know if I raise that, Gpu usage goes up?

Resolution scaling. Enables you to try out 4K on your 1080P screen. Experiment with it, should be more load on your gpu's. If you can get up to 1440P (which your cards will do easily) you should see much better, more consistent usage. at 1080P 200% = 4K res. At 1440P 150% = 4K res.

Geeman1979 · 21 Mar 2014 at 18:30

whyscotty said:
What res are u using Gee?

1080p

Also run it at 1440p but it's not much better. Gpu usage still dips low.

LtMatt · 21 Mar 2014 at 18:31

Angst said:
Strangely matt cleans up a thread rather than derailing it.

Angsty poos!!

I'm afraid i do agree with the others though he'd be better off getting another cpu. However that cpu would be fine for BF4 if he was using Mantle. His PSU is on the right limit as well, but should power 2x780's at stock. I had my 290's running off a 750W gold PSU but it was far from ideal.

whyscotty · 21 Mar 2014 at 18:33

Geeman1979 said:
1080p

Also run it at 1440p but it's not much better. Gpu usage still dips low.

I'll give 1080 a go and what I get

LtMatt · 21 Mar 2014 at 18:35

Geeman1979 said:
1080p

Also run it at 1440p but it's not much better. Gpu usage still dips low.

Gee can you give me an example or a specific area/level where you get low gpu usage? I'll run a dx and mantle 1080P comparison and stay in that area for like 1-2 minutes and then show you my afterburner usage statistics. I'd bet my DX usage be will similar to yours.

whyscotty said:
I'll give 1080 a go and what I get

TRI Titan SLI at 1080P. Lol.

Angst · 21 Mar 2014 at 18:37

LtMatt said:
Angsty poos!!

I'm afraid i do agree with the others though he'd be better off getting another cpu. However that cpu would be fine for BF4 if he was using Mantle. His PSU is on the right limit as well, but should power 2x780's at stock. I had my 290's running off a 750W gold PSU but it was far from ideal.

Aye he should just cope on that psu im running my 2 cards on a 750, it only cuts out if i overclock them

.
The only games i accept a better cpu may make a difference on is bf4 and crysis 3 but every other game comes nowhere near to needing that cpu usage at 60hz.

Geeman1979 · 21 Mar 2014 at 18:39

LtMatt said:
Gee can you give me an example or a specific area/level where you get low gpu usage? I'll run a dx and mantle 1080P comparison and stay in that area for like 1-2 minutes and then show you my afterburner usage statistics. I'd bet my DX usage be will similar to yours.

TRI Titan SLI at 1080P. Lol.

The Shanghai map is the worst for it. It dips all over the place.

LtMatt · 21 Mar 2014 at 18:41

Geeman1979 said:
The Shanghai map is the worst for it. It dips all over the place.

Ok. Will find a 64 man server, play for two minutes on Mantle and then DX and report back. Will run my standard 24/7 cpu overclock of 4.8ghz and my gpu's at stock 975/1250. Back in a pugh.

LtMatt · 21 Mar 2014 at 19:00

Geeman1979 said:
The Shanghai map is the worst for it. It dips all over the place.

LtMatt said:
Ok. Will find a 64 man server, play for two minutes on Mantle and then DX and report back. Will run my standard 24/7 cpu overclock of 4.8ghz and my gpu's at stock 975/1250. Back in a pugh.

I believe if it weren't for the packet loss, Mantle would be close to 100% solid and wouldn't budge, unless you hit the engine limit of 200fps. Would love to see what usage a 6 core cpu would offer on Mantle with two extra cores and four extra threads for the gpu's to use.

1080P
Ultra Preset +x4 AA
75 FOV
Two minute time demo near the middle of the map
Siege Of Shangai 64 man CQ Large

DX11.1

Mantle

whyscotty · 21 Mar 2014 at 19:06

LtMatt said:
TRI Titan SLI at 1080P. Lol.

Yeah ok - should have engaged brain first

780 Sli @ 1080

LtMatt · 21 Mar 2014 at 19:07

Ahh my bad scotty boi forgot about your boys rig.

Hey whos that sexy beast in the top right hand corner?

At least it shows which map i used, 64 man Siege.

I have to admit, like you above even i got 99% constant (almost) and 200fps on metro on dx11 1080.

whyscotty · 21 Mar 2014 at 19:10

LtMatt said:
Ahh my bad scotty boi forgot about your boys rig.

Hey whos that sexy beast in the top right hand corner?

At least it shows which map i used, 64 man Siege.

Oops - didn't realise I should have used Shanghai

LtMatt said:
I have to admit, like you above even i got 99% constant (almost) and 200fps on metro on dx11 1080.

Proof or it didn't happen