AMD GPUs can be massively bottlenecked by low end CPUs[COD: AW] [Digital Foundry]

[Sharkyx1]

 

Digital Foundry put out a video a month ago looking to verify results from Game GPU, showing huge CPU bottlenecks on AMD cards vs equivalent or even weaker Nvidia GPUs. 

 

The results here speak for themselves, with an R9 280 not only falling behind a GTX 760 but also devastatingly falling behind the GTX 750ti as well by a large margin. This really puts a dent in the whole idea of AMD for value based systems, when AMD cards need higher end CPUs to really get the performance they advertise

 

 

[wpirobotbuilder]

We already knew this. That's one of the big reasons Mantle was created -- to alleviate CPU bottlenecks.

 

This also seems very thrown together. With more CPUs and different graphics cards and games you could get a better idea if this is a result of the AMD software/hardware stacks, or just an isolated case.

[Guest]

lol I have i3 and I want to buy r9 270

but I saw earlier that my cpu/r9 270 combo works fine

[Lotus]

I thought this was common knowledge. Some simulation is handed off to NVidia cards, lessening the load on the CPU yet this doesn't happen on AMD cards.

[Levent]

everyone knows that drivers are shit 

[79wjd]

We already knew this. That's one of the big reasons Mantle was created -- to alleviate CPU bottlenecks.

It's common knowledge, but I didn't realize it was that much. 

[SkilledRebuilds]

Regardless of how you put the information the Title is misleading...

They tested ONE game, not a representation of ALL games, but your title presumes people to think otherwise being non-specific.

You should add  'COD:AW' to the title or mix it up with 'COD:AW has proven itself worse on AMD than Intel (DF)' otherwise more people like me will bring it up anyway.

[Sharkyx1]

Regardless of how you put the information the Title is misleading...

They tested ONE game, not a representation of ALL games, but your title presumes people to think otherwise being non-specific.

You should add  'COD:AW' to the title otherwise more people like me will bring it up anyway.

We good now?

 

 

I posted this, because i found it surprising, yes everyone knows that AMD cards bottleneck faster, but no one said anything to this effect, which is basically half the framerates they should be getting

[Yoinkerman]

Looks like poor game coding or perhaps amd drivers, likely both

[holytoledo]

Huh. Neat to know.

 

 

I think this is more of a general rule than anything. Don't pair weak cpus with strong gpus.

 

I almost paired a 970 with a G3258 when selecting my build parts.

[SkilledRebuilds]

We good now?

 

 

no one said anything to this effect, which is basically half the framerates they should be getting

Thanks man, That's all I had to say on that subject.

 

and I agree that it should be posted, the more people know, the better.

[papeles]

I don't really buy this. I don't even consider i3 to be a low end cpu, probably a mid tier one. This just shows that AMD needs to get their sht together in the driver department, because as far as i remember nvidia launched a driver few months ago to reduce the cpu overhead and stuff like that.

 

So to summ it up, it's not the CPU problem, it's the AMD drivers.

[qwertywarrior]

pretty sure this is an isolate case

since XP u always have that "one" game that does horrible on a GPU from one vendor

[dragosudeki]

I don't really buy this. I don't even consider i3 to be a low end cpu, probably a mid tier one. This just shows that AMD needs to get their sht together in the driver department, because as far as i remember nvidia launched a driver few months ago to reduce the cpu overhead and stuff like that.

 

So to summ it up, it's not the CPU problem, it's the AMD drivers.

We've also recently got news of a new AMD driver that helps performance in some cases. Let's just see...

 

Though this is one isolated scenario, would like to see the differences in other games. Perhaps its not shown in other games due to this being the only case? Would like to find out.

[marldorthegreat]

lol I have i3 and I want to buy r9 270

but I saw earlier that my cpu/r9 270 combo works fine

Why did you buy an i3?  The AMD 6300 is the same price, with MUCH better performance???

[xAcid9]

I would like to see the GPU usage of that 280.

[79wjd]

Why did you buy an i3?  The AMD 6300 is the same price, with MUCH better performance???

Source of this "MUCH better performance" please. 

 

In the vast majority of games, an i3 will beat an FX 6300. 

[The_Evenger]

yeah, I noticed with my 8350...

[SteveGrabowski]

I wish Digital Foundry would do this same test with other games, as this result it about a month old, and so far, COD AW is the only game I have seen this kind of bottleneck on using a Haswell i3.

[ComradeHX]

This means CoD: AW has problems (but I don't recall them having PhysX, although particle physics did exist).

Because it runs a lot worse than BF4 on a Pentium.

[brownninja97]

hmm odd as my i3 + 7870xt(basically a 280) seems to go very well in most games, when i throw my i5 into the mix ill see how much of difference i get

[Guest Kloaked]

Can't watch the video at the moment. Did they match up Intel dual and quad core chips with AMD 6 and 8 cores?

[Sharkyx1]

Can't watch the video at the moment. Did they match up Intel dual and quad core chips with AMD 6 and 8 cores?

They run a 760 on an i7 and an i3 as well as a R9 280 on both

 

The 760 has minimal performance drop, the 280 is halved whenever anything dramatic is on screen

[Sharkyx1]

I wish Digital Foundry would do this same test with other games, as this result it about a month old, and so far, COD AW is the only game I have seen this kind of bottleneck on using a Haswell i3.

Yeah, it would be nice if they did more testing, but their bread and butter is console performance testing and comparison, PC videos are less often, though recently theyve been doing PC related stuff more often.

[dalekphalm]

I highly suspect that this is a Driver issue, not a design flaw in their GPU's. If it was a design flaw, we'd see the issue more frequently with other games.