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I7 990x @ 3.46ghz will it Bottleneck GTX 590 SLI?

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July 25, 2011 7:54:35 PM

hi, i have i7 990x 3.46ghz @ stock speed, i have GTX 590 already if i buy another GTX 590 will it bottleneck my cpu?

meaning will my cpu wont function properly if i install another GTX 590 into quad sli? i dont want to overclock it yet, but would it be fine without overclock

Thanks
a b K Overclocking
July 25, 2011 8:27:15 PM

I would say.. no.
July 25, 2011 8:30:33 PM

wintermint said:
I would say.. no.


Thanks for reply, no meaning that...it will be fine getting another GTX 590 ?

Thanks
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July 25, 2011 8:42:15 PM

I think it's hard to say because no game needs nearly that amount of power yet. Generally though, the majority of games are GPU intensive and i can't see anything needing that kind of CPU power any time soon so i'd say youd be fine. I should mention though, one GTX 590 is probably completely lag free even in a ridiculous resolution like 5760x1200 on any game so i doubt that youre even going to notice the difference for at least a few more years.
July 25, 2011 8:47:09 PM

jmsellars1 said:
I think it's hard to say because no game needs nearly that amount of power yet. Generally though, the majority of games are GPU intensive and i can't see anything needing that kind of CPU power any time soon so i'd say youd be fine. I should mention though, one GTX 590 is probably completely lag free even in a ridiculous resolution like 5760x1200 on any game so i doubt that youre even going to notice the difference for at least a few more years.


Thanks for response, yeah i understand, what it is that the cpu i have 990x is for my work use like i do editing of photos video all that... i do play games aswell so by me getting another GTX 590 i can just relax you know what i mean, but is it ok for me to go Quad Sli with the cpu i have..without overclocking it?
a b K Overclocking
July 25, 2011 8:52:22 PM

Adding another card will not cause your CPU to function improperly. Even so, at it's stock clocks it's reasonable to say that in a game where all four of your GPUs are working in SLI properly (two per card) your CPU will be a bottleneck. Honestly it's not a big deal for you at the moment since any scenario where your CPU is the limiting factor would generally be cases where you're getting over 100 fps anyway. In the future you will have to overclock your CPU to keep up for some games. If you want to get the most out of your cards you will eventually have to overclock your CPU.
July 25, 2011 9:01:14 PM

Yeah i think eventually youre going to want to overclock it like megamanx00 said but we are talking 5+ years down the line i think. Youre going to need an absolute monstrosity of a PSU too, 1.2Kw or something.
July 25, 2011 9:07:28 PM

megamanx00 said:
Adding another card will not cause your CPU to function improperly. Even so, at it's stock clocks it's reasonable to say that in a game where all four of your GPUs are working in SLI properly (two per card) your CPU will be a bottleneck. Honestly it's not a big deal for you at the moment since any scenario where your CPU is the limiting factor would generally be cases where you're getting over 100 fps anyway. In the future you will have to overclock your CPU to keep up for some games. If you want to get the most out of your cards you will eventually have to overclock your CPU.


Ok, thanks for your response, its just that i know now so when i sli it, i wont need to worry about another 5 years or so, just for now when i get it atleast im just sorted.

July 25, 2011 9:09:23 PM

jmsellars1 said:
Yeah i think eventually youre going to want to overclock it like megamanx00 said but we are talking 5+ years down the line i think. Youre going to need an absolute monstrosity of a PSU too, 1.2Kw or something.



My PSU at the moment is Corsiair AX 1200w gold, thats sli ready, i never did SLI before so, i though why not go ahead :) 
July 25, 2011 9:25:51 PM

i do have enought room space for it also its haf-x case
July 25, 2011 10:39:50 PM

Love the cooler, i have one myself. Theyre epic.
a b K Overclocking
July 25, 2011 10:57:17 PM

jmsellars1 said:
I think it's hard to say because no game needs nearly that amount of power yet. Generally though, the majority of games are GPU intensive and i can't see anything needing that kind of CPU power any time soon so i'd say youd be fine. I should mention though, one GTX 590 is probably completely lag free even in a ridiculous resolution like 5760x1200 on any game so i doubt that youre even going to notice the difference for at least a few more years.

Sorry, but none of this.

It depends what resolution you're playing at. If you're at 19x12 then you could potentially be CPU bound in some cases, but it probably wouldn't matter as you'd have high minimum framerates regardless. At any resolution higher than this you'd be GPU bound, so your system would be pretty well balanced with quad-SLI GTX 590s.
a b K Overclocking
July 26, 2011 2:44:01 AM

Some points:

1) I have a 27" Dell U2711 capable of 2560x1440. I play most games at 1920x1080. There are almost NO games that are best played at higher than 1920x1080 because:
a) The textures are not greater than 1920x1080 anyway
b) The game interface may not be scalable and looks too small
c) The game looks THE SAME but the performance is lower on 2560x1440

I think I have maybe two games running at 2560x1440. One is Lego Harry Potter 1-4 and I play at this resolution because I have no control over Anti-Aliasing. Performance on my machine is a solid 60FPS on both resolutions (VSYNC is enabled). It simply looks better on 2560x1440.

However, if I had control over AA, it would likely look THE SAME on both resolutions so I'd still go with 1920x1080 to lower graphics card fan noise.

2) Graphics card fan noise:
Most of your computer noise comes from your single graphics card. With two cards, your system would be very, very noisy even in idle mode. The extra heat and CPU usage in games would also drive up the other fans.

INSANE NOISE LEVELS!!!

3) Show me a game that would benefit from a second graphics card?

The lowly GTX560Ti can basically max out most games out there. Like I said, use 1920x1080 for most resolutions. Run at 60FPS, VSYNC'ed. Even if a game COULD benefit from a second card, the difference would be very, very, very small and definitely not worth the extra noise.

4) QUAD SLI issues:
You should investigate potential issues, as well as look at benchmarks.
*Look at benchmarks at 1920x1080. You only need 60FPS. It's ridiculous to add a card that takes you from 90FPS to 150FPS if you only play 60FPS.

5) NEWER CARDS!

I'm personally planning to replace my HD5870 (still a fast card) with an NVidia 600 series. If you actually CAN make use of a faster graphics subsystem, I recommend waiting for a new NVidia 6xx, and NOT getting a second card.

Reasons to get a NEWER CARD:
- Quieter due to usage of 28nm transistor die (current 40nm).
- Quieter (probably) due to slight improvement of power management (was a HUGE jump from 400 to 500 series.
- Tesselation will likely be improved (but not really utilized for a long while).
- Overall Graphics performance is significantly better (they've said this).

**There's probably a SWEET SPOT for price and noise to create a 2xSLI setup. SLI can be slightly cheaper AND quieter than a single dual-graphics card. The difficulties in creating a top-end card drive the price high and splitting the graphics between two cards is much better for noise (two sets of heatsinks and fans).

***I'm betting that you could purchase TWO NEW NVIDIA 600 SERIES cards for the same price as adding a second card in your new system, but get better performance, much lower noise and improvements that can't be utilized fully yet (improved tesselation, for example).

Not only that, but you then sell your current graphics card as well before the 600 series catches on and get some money back.

(occasionally you can sell graphics cards for MORE money if you wait, but I wouldn't gamble on that. usually they're sold for people who want a SECOND card and who are also ignorant of the fact that they're getting ripped off. For example, HD5870's are selling for about $400. You could buy two NVidia cards for the same price and still beat the 2xHD5870 setup).

Summary:
- Wait for the NVidia 600 series to be released.
- Also, wait until there are new games that require that level of graphics processing power.
- Also, consider phasing out PC gaming when the next XBox is released.

(It depends on whether the next XBox supports Keyboard/Mouse on most games, and also if companies stop making PC games. I'm talking about phasing out over a period of years, but this is possibly my last gaming PC. I suspect I'll buy one more graphics card in a year or two, and wait until the next XBox has been out a year to see what's up.)
July 26, 2011 2:59:33 AM

A single GTX590 should more than 'suffice' at least two years and possibly three, at which point you will likely be wanting a new CPU/MB and DirectX 12.0 GPU anyway....

Might as well get your money's worth from your rig as long as possible in light of the X58/990x combo's cost....(many 990x samples will run at 4.2 GHz or higher anyway, so it should be quite a while before you ever considered 'cpu-limited'!)
July 26, 2011 12:39:06 PM

Thanks for your reply guys I think I know what to do I go for quad sli and later on over clock my CPU
July 26, 2011 1:36:40 PM

cuecuemore said:
Sorry, but none of this.

It depends what resolution you're playing at. If you're at 19x12 then you could potentially be CPU bound in some cases, but it probably wouldn't matter as you'd have high minimum framerates regardless. At any resolution higher than this you'd be GPU bound, so your system would be pretty well balanced with quad-SLI GTX 590s.


How does that conflict with what i said?
a b K Overclocking
July 26, 2011 9:37:01 PM

jmsellars1 said:
How does that conflict with what i said?

Sorry, that was quite rude of me. The only thing I took issue with was the assertion that a single GTX 590 could run wild at 57x12. Even two will barely make the grade at max settings in some games.
July 27, 2011 1:31:09 AM

Well apologies, 'completely lag free' was a bit of an exaggeration. It was a bit misleading but i think a 590 would play anything at that resolution, just may have to turn off AA and AF for something like Crysis or Metro i suppose. I just meant that he's not going to be in any rush to buy another one, even if he wants to play on 3 monitors.
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