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Palit Jetstream GTX 670 SLI

Last response: in Graphics & Displays
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January 22, 2013 11:31:54 AM

Hello guys,

I'm planning to SLI my Palit Jetstream GTX 670 2048MB with another similar card and I'm wondering if my PSU can still handle it or do I need to upgrade. Here are my PC specs:

CPU: AMD FX-6300 Vishera 3.5 Ghz (4.1 Ghz Turbo). I never OC'ed it yet due to I only have stock cooler for now.
Graphics: As mentioned
Mobo: Gigabyte 990FXA-D3 rev 1.1
RAM: G.Skill Sniper 2 x 4GB 1600 9-9-9-24 1.25v (I've manually set it on BIOS based on it's indicated specs)
Casing: Thermaltake Overseer RX-1. It came w/ 2 x 200mm Blue LED fans then I purchased additional two 200mm fans.
PSU: Seasonic X660w 80+ Gold Modular PSU. The 12v rail is 54A
OS: Windows 7
Monitor: KTC 23" LED, for now. I'm playing on 1080p. I know it's overkill for GTX 670 and twice the impact of overkill if it's SLI. I'm planning to switch to 120Hz monitor in the future as well.
Games: A lot but I play more on Metro 2033.

Purpose of SLI: To prepare for Metro Last Light, Crysis 3 so simply put, future proofing. I'm also waiting for that moment for 670 prices to go down!! :) 

Your inputs will be very much appreciated!

Many thanks.
January 22, 2013 12:12:19 PM

I would try over-clocking it before upgrading. From all the benchmarks I have seen the 6300 can hold its own against an i5-3570k at stock. Everyone says that the 3570 doesn't bottle-neck with any GPU. (I don't have experience myself, although I am ordering a 6300 later this week).
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January 22, 2013 12:27:02 PM

overclocked 670 sli systems may not even use 500W (system load) so just as long as your psu has 4 6-pin PCIe connectors (and it does) and your MB can handle 2 VGA cards, your fine (and you are). Your PSU is very solid. no worries
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January 23, 2013 6:14:07 PM

Thanks for all your inputs! :) 

I attempted to disable cool and quiet and changed the multiplier to achieve the boost speed of fx 6300 which is 4.1 Ghz (this is my 1st time OC'ing AMD CPUs). But then I loaded the defaults in BIOS because again I'm on stock cooler for the meantime.

Is 4.1 Ghz enough for the SLI 670s on this processor?
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January 23, 2013 7:06:27 PM

You can overclock the crap out of the FX 6300 and it will still bottleneck 670's in SLI. I had the FX 8150 and it was a no go. I was only getting about 60% usage on the cards. I had to jump ship to intel. The i5 or a i7 will do the job.
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January 23, 2013 7:23:46 PM

Yea I agree with the bottle necking issue I would think it would be more beneficial if you are seeing bottle necking from your CPU to get a really good cooler and overclock it to see if it alleviates the issue.
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March 4, 2013 9:20:55 PM

No it will not bottleneck to a significant degree you will still see a 40-50fps on top of one GTX 670 for most games. The only time CPU matters in gaming is games the have a lot of players and large maps with large amounts of anistropic filtering (calculating physics, locations, and pre-rendered frames) another thing that hits CPU performace other than distance POV is shadows and reflective qualities, so they say, yet I have not found a game where the reflection value has changed my FPS and only night shadows in GTA 4 has hit my fps about 3-5 FPS

I run heaven with one card I get 50 fps with SLI enabled I get 100fps
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