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My First Core i7 Watercooling - Page 9

post #81 of 110
Quote:
Originally Posted by Exidous View Post
Slightly skewed, it seems you have taken this water cooling thread and turned it into your own crusade of ATI CFX vs NVidia SLI. Leave it alone and get back on topic!

Edit: + rep for a nice system!
Sorry about getting abit off topic. We are still talking about his system, just slighty skewed.
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post #82 of 110
I see what you did there. :-p
post #83 of 110
ok here is a comparison

three cards at 3.9 with a qx9650 and physics I would get P26573
http://service.futuremark.com/compare?3dmv=231631

two cards same speed P24340

http://service.futuremark.com/compare?3dmv=222434

so about 3k gain with the third card (lets say 4k for good measures lol)

Right now at 4.4 I get about 30k without physics with 3 cards

so if I took a card out that should be me around 25-26k with the cpu at 4.4 without physics
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post #84 of 110
That is a beautiful setup!

Just one question: What's that white coupler thing you have right by the window of your pc?
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post #85 of 110
Koolance flow meter I think.
post #86 of 110
Thread Starter 
Yep
post #87 of 110
Quote:
Originally Posted by iggster View Post
ok here is a comparison

three cards at 3.9 with a qx9650 and physics I would get P26573
http://service.futuremark.com/compare?3dmv=231631

two cards same speed P24340

http://service.futuremark.com/compare?3dmv=222434

so about 3k gain with the third card (lets say 4k for good measures lol)

Right now at 4.4 I get about 30k without physics with 3 cards

so if I took a card out that should be me around 25-26k with the cpu at 4.4 without physics
First off, where did you get 3K, 26573 - 24340 = 2230, no where near 3K. So you decide to add another 2K for good measure? Seriously...

I would love to benchmark against your system, maybe when I get the Phenom II so I can actually compete with you. This CPU sucks. From looking at the benchmarks, the 4870 1GB CFX can compete with 2xGTX280 in SLI, if not, out perform it.

Why would you even mention Crysis? That is the worst game to compare benchmarks. That game is so Nvidia Bias it not even funny.

This might not make much sense, but this is the closest resolution to my screen and I think this game is more fair that Crysis.



We can chat when I get my second card on Thursday.

One more thing...Have you ever heard of the Sideport on the ATI 4870X2's? Its an internal chip connecting the two 4870 cores together. At launch, it was disabled.

ATI has mentioned that it will eventually be activated via drivers. When it does, it should increase the card's over speed by 10-15%


I'm going to bet that it will be enabled in a driver release that coincides with the nvidia gtx295 release.
Edited by sledgehammer1990 - 12/22/08 at 1:03pm
post #88 of 110
Thread Starter 
Quote:
Originally Posted by sledgehammer1990 View Post
First off, where did you get 3K, 26573 - 24340 = 2230, no where near 3K. So you decide to add another 2K for good measure? Seriously...

I would love to benchmark against your system, maybe when I get the Phenom II so I can actually compete with you. This CPU sucks. From looking at the benchmarks, the 4870 1GB CFX can compete with 2xGTX280 in SLI, if not, out perform it.

Why would you even mention Crysis? That is the worst game to compare benchmarks. That game is so Nvidia Bias it not even funny.

This might not make much sense, but this is the closest resolution to my screen and I think this game is more fair

We can chat when I get my second card on Thursday.

One more thing...Have you ever heard of the Sideport on the ATI 4870X2's? Its an internal chip connecting the two 4870 cores together. At launch, it was disabled.

ATI has mentioned that it will eventually be activated via drivers. When it does, it should increase the card's over speed by 10-15%


I'm going to bet that it will be enabled in a driver release that coincides with the nvidia gtx295 release.
Each card!!!!!!!!!?
post #89 of 110
I would assume so.

post #90 of 110
Quoted from XtremeSystems.org forums
Quote:
Before I get to the meat of this thread, you will need some background information. You will need to know how micro stuttering in CF and SLI configurations occurs.
Quote:
Originally Posted by 003
What is Micro Stuttering? We can define it in very simple terms. Micro stuttering occurs when any number of GPUs linked in an Alternate Frame Rendering system are able to fully saturate the bandwidth available on the interconnect(s) between the GPUs.

When this happens, any number of the frames that have been rendered may be dropped by the driver, resulting in less frames displayed than were rendered, and different deltas between the stream of frames that actually get drawn on the screen. That is Micro Stuttering.

So, how do the interconnect(s) become saturated? There are two ways for this to occur. The first is when the framerate is so high that the interconnect(s) is/are unable to carry all of them, and some get dropped. Knowing this, it can be concluded that this will occur more and more as the resolution of the frames is increased, as they will take up more space.

The second way this can occur is when anti-aliasing (particularly at high levels) is enabled. AA is performed during post processing of the rendered frames, and it takes up a large chunk of additional memory. The higher the level of AA, the more memory will be taken up. So, in the case of AA being enabled, it is very possible to have the bandwidth on the interconnect(s) between the GPUs to become saturated even when the framerate is not very high.

These two methods for Micro stuttering can occur one at a time or both at once, in the latter case, the stuttering will obviously be much worse.
All right, now that you know what micro stuttering is and how it occurs, allow me to get to the main point of this thread.


So how can micro stuttering be corrected? Simply by increasing the bandwidth available to the interconnect(s) between the GPUs. In the case of everything but the 4870X2 -- this is impossible, as it would require reengineering the card.

However in the case of the 4870X2, there lies a still dormant Sideport interconnect. By dormant, I mean that no currently released Catalyst drivers (official, beta, leaked or otherwise) enable or make use of it. It is basically a very high speed link between the GPUs -- much faster than the crossfire bridge which is currently being used. The crossfire bridge has a bandwidth of 0.9GB/s, where as the sideport interconnect has a bandwidth of 5GB/s. If and when AMD releases a driver that enables it, the interconnect(s) between the GPUs on the 4870X2 will be able to sustain a much larger amount of bandwidth before they become saturated, and therefore significantly reducing or eliminating Micro stuttering.

So why has ATI not enabled the Sideport interconnect? It's very simple. They are waiting for the GTX280GX2 from nvidia, and when it comes, they will unveil the sideport interconnect in order to look like they've worked a miracle. I doubt it would make the card faster than a GTX280GX2, but it would certainly shine more rays of light on the 4870X2.

Right now they have no need to enable it -- the 4870X2 is already the fastest single card you can buy.

I find this absolutely ridiculous. If and when the sideport is enabled, all the stuttering problems in Far Cry 2 with high levels of AA enabled would virtually disappear or be significantly reduced. But they are holding out on this as a marketing decision, they don't care about the people that bought the 4870X2 and suffer from micro stuttering.
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