Will I Bottleneck?

[Flanker]

Re: Will I Bottleneck?

Then that is not a case of bottlenecking, the AGP bus speed & FSB is the same speed so why would that have an effect on GPU performance. By jumping to dual core there isnt enough depreciation in memory bandwith to impact GPU/AGP bus performance. Dual cores do suffer a 10% fall in memory bandwith compared to single core processors, as I said before this isnt enough to impact GPU performance. I have read somewhere that AMD has altered the hypertransport to compensate for the initail drop in bandwidth.

An example of bottlenecking is, having a graphics card that is way to powerfull for the system, the system bus can not transport all the data quick enough.

Motherfo's system (single or dual core) will run his AGP 6800GT flat out, without swallowing up all the system resources.

Incorrect concept of a bottleneck.

If there is no bottleneck, then how do you explain this? .4FPS difference between the 2Ghz A64 3200+ and the 2.8Ghz A64 FX57?

[Merlin]

Re: Will I Bottleneck?

Incorrect concept of a bottleneck.

If there is no bottleneck, then how do you explain this? .4FPS difference between the 2Ghz A64 3200+ and the 2.8Ghz A64 FX57?

I agree with you that a faster CPU will give a better FPS, there is no doubt about that.

Motherfo asks a different question though.

I'm upgrading to a 939 AMD X2 4600+
.....will I bottleneck at all because I have an AGP card?

Will his AMD X2 bottleneck due to his AGP graphics card?. My response was correct it think.

Edit - I think we agree but we have our wires crossed a bit. Also on a side note, was that graph based on PCIe graphics cards?

[Flanker]

Re: Will I Bottleneck?

I agree with you that a faster CPU will give a better FPS, there is no doubt about that.

Alas, there is. That's not what I'm saying. I'm saying the exact opposite; a faster CPU will not give a higher rate of FPS.

Will his AMD X2 bottleneck due to his AGP graphics card?. My response was correct it think.

Edit - I think we agree but we have our wires crossed a bit. Also on a side note, was that graph based on PCIe graphics cards?

His AMD X2 will bottleneck, but not due to him having a AGP card. Its a 50/50 kind of answer.

I never questioned your response to him. I simply explained why the GPU is the bottleneck and the CPU is not [normally] the bottleneck.

That graph was made using a single PCI-e GeForce 7800GT. As you can see, a S939 A64 3200+ is about all you need to max the videocard out.

[Merlin]

Re: Will I Bottleneck?

His AMD X2 will bottleneck, but not due to him having a AGP card. Its a 50/50 kind of answer.

Please enlighten me then.

[Flanker]

Re: Will I Bottleneck?

Enlighten yourself by looking at that graph above. There is a .4 (read: point four) FPS difference between AMD's relatively weak 3200+ and it's flagship (as far as clockspeed goes) FX-57.

[Merlin]

Re: Will I Bottleneck?

As you can see, a S939 A64 3200+ is about all you need to max the videocard out.

There you said it yourself that the 3200+ is enough to max the videocard out? So where is the bottleneck if the GPU is maxed out and the CPU still has some grunt left?

[Flanker]

Re: Will I Bottleneck?

Isn't it obvious? The videocard cannot processes the instructions that the more powerful CPU is sending to it. Here's the definition of a bottleneck;

"A bottleneck is one process in a chain of processes, such that its lmited capacity reduces the capacity of the whole chain."

The GPU is limiting the capacity of the CPU by not being able to processor all of the instructions that the CPU sends to it.

[Teh_Spambot]

Re: Will I Bottleneck?

Not just because its an AGP, its because his CPU is disproportionately powerful compared to his graphics card.

Basically, your CPU 3500 right now is roughly even with the GPU, so getting a stronger CPU wont help much, as the GPU is the limiting factor anyway.

A better idea is to get like you said, a 7800, and then get a weaker CPU. The stronger CPU would only improve performance if you also got a stronger GPU.

One thing confuses me.... that graph with running BF2 at 200 FPS on high quality? Is that possible? I thought there was a cutoff at 100 FPS.

[Flanker]

Re: Will I Bottleneck?

I say he keeps his CPU and upgrades his videocard. He should only need to upgrade his CPU when he upgrades to a 7900GT.

[Merlin]

Re: Will I Bottleneck?

Isn't it obvious? The videocard cannot processes the instructions that the more powerful CPU is sending to it. Here's the definition of a bottleneck;

"A bottleneck is one process in a chain of processes, such that its lmited capacity reduces the capacity of the whole chain."

The GPU is limiting the capacity of the CPU by not being able to processor all of the instructions that the CPU sends to it.

You have it wrong, You are a bit maixed up. Like i put in the other tread about bottlenecking:

"In a 3D environment the GPU feeds the CPU, The GPU does the majority of the work, otherwise Why do we spend so much money on graphics cards? Mainly the CPU calculates AI, Physics, plus other general game logic like mapping where objects are in the game world etc.."

[Flanker]

Re: Will I Bottleneck?

Lets keep this in one thread, shall we?

Other one, if you would.