Core i5 750 + GTX 580

[Deadlycaster]

Hello everyone!

Have been searching quite a bit for an answer regarding my CPU while using a GTX 580, how much will it bottleneck?
As the title says im currently using a Core i5 750 cpu and a HD5850 gfx card, ill be buying a 580 tomorrow i think,
so yeah i think ill prolly be able to run it at close to 100% effiency without bottleneck but i do not know this for sure.

As a bonus question, how much (and i know this will bn to hell and back) will the bottleneck be with dual 580 cards?

Anyone who knows this or can point me towards any information on it will have my gratitude and the internet-cookie shown below!
(THANKS IN ADVANCE)

[BicycleMafioso]

Why would it bottleneck a single 580?
And in what precisely?

[OhpUldum]

I can't imagine the i5 750 really restraining that 580 too much man. The nice thing if it does end up restraining it you spend $30 and purchase the Hyperion 212+ CPU cooler and overclock that chip to 4.2/4.5 Ghz and call it a day. Surprisingly easy to overclock the i5 750.

[Deadlycaster]

well since we don't really know much about bf3 requirements yet just assume bc2 since im playing that alot atm, but how about 2 580's how will that perform?

---------- Post added 2011-07-25 at 12:59 AM ----------

I can't imagine the i5 750 really restraining that 580 too much man. The nice thing if it does end up restraining it you spend $30 and purchase the Hyperion 212+ CPU cooler and overclock that chip to 4.2/4.5 Ghz and call it a day. Surprisingly easy to overclock the i5 750.

i have only been able to reach 3,65ghz stable so im guessing its either my mobo or ram that is holding me back, but otherwise yeah i agree

[BicycleMafioso]

well since we don't really know much about bf3 requirements yet just assume bc2 since im playing that alot atm, but how about 2 580's how will that perform?

In BFBC2? 60+ fps of course.
I'm running an i5-760 (4 000 MHz) and a HD6970 and I get 60 fps. (EDIT - more like, 80~ dipping to 72. EDIT2 - Max settings except the apparantly useless HBAO, I think it was called. Inc 4x MSAA and 16x AF)
I won't even begin to speculate on BF3, but I do doubt the CPU would be the problem. A single GTX580 might be, though.

---------- Post added 2011-07-25 at 03:02 AM ----------

I can't imagine the i5 750 really restraining that 580 too much man. The nice thing if it does end up restraining it you spend $30 and purchase the Hyperion 212+ CPU cooler and overclock that chip to 4.2/4.5 Ghz and call it a day. Surprisingly easy to overclock the i5 750.

The Hyper 212+ will not be good enough to overclock it to above 4.0 - to 4.0 perhaps, but not above.

[Demoness]

To give you a reference, the GTX580 is a little less than 10% faster than a GTX 570 in most games. I run a 570 in my rig, with a core i5 2500k OC to 4.5GHz and I also play BC2. When I watch my proc usage and vid card usage while playing, my proc gets to about 80%-90% usage, while the card is slammed at 99%. Your proc might be right on the edge, but from my experience, and benchmark results that I have done and seen online, you should be in the green. If you double up on the cards and SLI two 580s though, you need at least a core i7 lynnfield, or a pretty quick OC sandybridge. I would like to add that while my card is bottlenecking my processor a tiny bit, I get a constant 100+ fps on 32 player oasis.

[Deadlycaster]

To give you a reference, the GTX580 is a little less than 10% faster than a GTX 570 in most games. I run a 570 in my rig, with a core i5 2500k OC to 4.5GHz and I also play BC2. When I watch my proc usage and vid card usage while playing, my proc gets to about 80%-90% usage, while the card is slammed at 99%. Your proc might be right on the edge, but from my experience, and benchmark results that I have done and seen online, you should be in the green. If you double up on the cards and SLI two 580s though, you need at least a core i7 lynnfield, or a pretty quick OC sandybridge. I would like to add that while my card is bottlenecking my processor a tiny bit, I get a constant 100+ fps on 32 player oasis.

alright, thank you :> and thanks to everyone else for your insights.

so im guessing 1 card is totally in the green as i suspected but 2 580's is prolly pushing it a bit, i think im going to try it anyways because im most likely going to upgrade either to sandy bridge or sandy bridge-e within 1 year

[BicycleMafioso]

I think people are confused by the term bottleneck.
It's not meant to describe what's holding you back from achieving even greater results, or describing the weakest part in your build.

It's meant to describe when one piece of hardware is throttling other parts to perform.
Ie, having such a bad CPU that upgrading from a HD4350 to a HD6990 still wouldn't be a performance increase of more than a few (4-10) FPS.

Getting an i7-Lynnfield from an i5-Lynnfield will more than likely be a decrease in performance rather than in increase.
And needing it to not bottleneck? What?
I'm sure that in say, Far Cry 2, with the same GPU, say, a GTX580 the new Llano CPUs, Phenom II x4, Phenom II x6, Lynnfields and Sandy Bridges will get mostly the same FPS, within the margin of error.

Getting 100+ fps with a GTX570 suggests a low resolution or low settings.

---------- Post added 2011-07-25 at 03:27 AM ----------

alright, thank you :> and thanks to everyone else for your insights.

so im guessing 1 card is totally in the green as i suspected but 2 580's is prolly pushing it a bit, i think im going to try it anyways because im most likely going to upgrade either to sandy bridge or sandy bridge-e within 1 year

If you have a motherboard supporting 16x/8x, 8x/8x or in some cases even 16x/4x, you will be fine with two GTX580s. I'm more worried about your powersupply and airflow than your CPU.

[OhpUldum]

Battlefield 3 Minimum System Requirements
OS: Windows Vista 64 bit
CPU: Core 2 Duo E4500 2.2Ghz or Athlon 64 X2 Dual Core 5000+
RAM: 2 GB
GFX: GeForce GT 240 or Radeon HD 5570
DX: 10
HDD: 15 GB

Battlefield 3 Recommended System Requirements
CPU: Core 2 Duo E8300 2.83Ghz or Phenom II X2 555
RAM: 4 GB
GFX: GeForce GTS 250 or Radeon HD 4830
GFX RAM: 512MB
DX: 11

Battlefield 3 Ultra System Requirements
CPU: Core i5-760 Quad 2.8GHz or Phenom II X4 965
RAM: 4 GB
GFX: GeForce GTX 460 or Radeon HD 5850
GFX RAM: 1GB

And thus the requirements

[Deadlycaster]

and that requirement have not been confirmed by DICE which means its not accurate

[OhpUldum]

Those are the requirements as of alpha.

[BicycleMafioso]

and that requirement have not been confirmed by DICE which means its not accurate

Seeing how they've said (I was less than ten feet from him when he said it) they haven't been able to max the game out even internally, I would agree.

[Saithes]

Seeing how they've said (I was less than ten feet from him when he said it) they haven't been able to max the game out even internally, I would agree.

Huh? I thought they said they were running it max on a GTX 580 in the demos at E3.

[BicycleMafioso]

Huh? I thought they said they were running it max on a GTX 580 in the demos at E3.

I wasn't at E3, but I do know there were GTX580s at Dreamhack. (EDIT - and I heard it was GTX580s at E3 as well)
But the demos weren't running absolute maxsettings accourding to the guy from DICE I heard talking.

[Demoness]

Getting 100+ fps with a GTX570 suggests a low resolution or low settings.

No. In fact I run that game at over 100 fps consistently at 1080p with every single setting available turned to ultra/high. The 2500k and GTX 500 series cards are both powerhouses.

[BicycleMafioso]

No. In fact I run that game at over 100 fps consistently at 1080p with every single setting available turned to ultra/high. The 2500k and GTX 500 series cards are both powerhouses.

I'd advice you to lower some settings so you can fully enjoy your 120Hz screen then.
And the GTX570 is mostly similiar to the HD6970 in performance. : P

I still doubt it, though.

[Demoness]

I think people are confused by the term bottleneck.
It's not meant to describe what's holding you back from achieving even greater results, or describing the weakest part in your build.

It's meant to describe when one piece of hardware is throttling other parts to perform.
Ie, having such a bad CPU that upgrading from a HD4350 to a HD6990 still wouldn't be a performance increase of more than a few (4-10) FPS.

Bottlenecking is most commonly caused by CPUs. The actual event occurs when a video card performs operations faster than the CPU can give instructions. Therefore, it is EXACTLY what will hold you back from "achieving even greater results." The ideal situation is to have both GPU and CPU above 85% under load if vsync is disabled, allowing both to perform to their maximum capacity to determine where your system's weakest part is. You contradicted your own statement in the same post. When a new video card is not improving your framerates, it is not being throttled. The CPU cannot keep up. It is simple as that. The same is true vice-versa: If you have an i7 990x and you have a radeon 4890, your VGA will be slammed at 99% on most current gen games, while cpu will be nearly idling. The reason for this is the same as before, but the other way round. Your VGA is completing operations at its maximum capacity, but the 990x is only giving it as many instructions as it can handle.

---------- Post added 2011-07-25 at 02:01 AM ----------

I'd advice you to lower some settings so you can fully enjoy your 120Hz screen then.
And the GTX570 is mostly similiar to the HD6970 in performance. : P

I still doubt it, though.

The GTX 570 is a decent margin ahead of any ATI card under $350, or I would have bought one of those instead. My screen is only 60Hz, so lowering settings is not necessary.

[voorshwa]

I'm sorry, but I'm very skeptical that a game is going to require a 64 bit OS as a minimum spec. While 64 bit OS' are getting more and more commonplace, having it as a requirement just doesn't seem practical to me. They are shooting themselves in the foot if they do it that way.

My 2 cents...

V

[Saithes]

I'm sorry, but I'm very skeptical that a game is going to require a 64 bit OS as a minimum spec. While 64 bit OS' are getting more and more commonplace, having it as a requirement just doesn't seem practical to me. They are shooting themselves in the foot if they do it that way.

My 2 cents...

V

4GB or more RAM is quite cheap now and most any modern prebuilt PC comes with 64bit as well. Not to mention processors have had 64bit support for quite a while now. If anything I see it as a step in the right direction.

[BicycleMafioso]

The GTX 570 is a decent margin ahead of any ATI card under $350, or I would have bought one of those instead. My screen is only 60Hz, so lowering settings is not necessary.

Put on VSync, run DX11 mode, et voilà. 74 avg FPS, 55 min.
And no, the HD6970 is on par with the GTX570. In CrossfireX, it's quite a bit ahead of two SLI'd GTX570.
Also, my CPU is only reaching 70% in BFBC2, while my GPU is reaching 80%.