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post #11 of 13
@OP, getting multiple cards isn't always the best choice as there are limits to it (such as always having to play fullscreen for AMD cards and increased heat/power consumption) . I can definitely say my gaming experience has been much better going from 2x 5870s to a single 7950. Although my performance was slightly decreased, I could support my Eyefinity setup with the higher VRAM and there was no worrying about CF performance for certain games. I would go with the suggestion of waiting to upgrade to the next gen GPU.

As for watercooling, you can get your loop setup as you please right now. When you do finally add a GPU block to the loop, you simply route the tubing to go to your GPU block. There's no specific order to follow in your loop aside from the reservoir always being before your pump (unless they are integrated into 1 unit). This is because you can never let your pump run dry as it can permanently damage or kill your pump in a manner of seconds. Aside from the res/pump, you will typically get recommendations to run the shortest and/or cleanest looking route for your tubing.
Quote:
Originally Posted by Papadope View Post

I never understand this.... The only time a Thuban is going to "bottleneck" crossfire is when vsync is off. Every CPU will bottleneck every GPU with vsync off. Do you really need 200+ fps? I'm running a Thuban with a 120hz monitor and don't have problems vsyncing at 120fps except in CPU bound games were an i5 cant hit it either. On those games I set the the refresh rate to 60/75/100HZ and move on with my life....

Also, the primary reason to getting a second card would be multiple monitors or just higher AA and tesselation. A Thuban certainly would not bottleneck this.

Have you ever tried to Crossfire with your current setup? Your statement is very valid for single-card/single-monitor gaming, but I'm talking about something entirely different.

I had problems with 2x 5870s when they were in Crossfire with my old AMD platform (955 @ 4.2ghz, NB @ 3ghz, RAM @ 1600 7-7-7-20 timings). When in single card mode, my 5870 would run 100% in games like BF3, but when in CF mode, they would run only at 50~70% and the gameplay was very choppy with high CPU utilization (80~99%). CF was technically maintaining 40~60FPS, but nothing I did could fix the choppiness. I was basically getting single card performance on my CF and single card mode would play more smoothly.

When I switched to an i5 2550K, the CF problem went away and both cards ended up running at 90~100% usage at all times. BF3 became as smooth as butter on CF and I was able to maintain a solid 50~60FPS.

If what I experienced was not a bottleneck, then I have no idea what to call it. 2x 5870s are only considered mid-ranged now, so I can only imagine how bad 2x 7970s would perform on a Thuban chip.
    
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post #12 of 13
Quote:
Originally Posted by South80 View Post

Steamroller will use less power hopefully.

I have heard that AMD will stay with AM3+ for another 3 years so your sabertooth 990fx should have alot of upgrade potential.

Well it is reasnoble to assume that under full load steamroller will be at least slightly more efficient and that they will have lower clocked models to cover low power powerformance market... but it is hard to compete vs intel on that side...

FX processors are performance AMD processors there is no need from them to sacrifice performance to gain "power efficiency" at least not on the top of the line ... they might have stuff like they have now FX-6300 with low TDP and overclocked version FX-6350 with higher TDP it is expected that enthusiasts will use them that are expecting all the performance they can get for there buck.

So to be honest all the power efficiency that they will get using resonant mesh, reduced manufacturing process and architectural impoundments will probably go straight back into even higher frequency on most models and most certainly flagship model . To be honest i expect AT least 10% to 15% higher frequencies on steamroller side then what we have now and even more down the road when manufacturing process matures.
post #13 of 13
Quote:
Originally Posted by Noviets View Post

Interesting points.. I have my bios set to 1.50, with LLC on extreme (130%)

I'm using the CNPS12X in my sig, it's air cooling but its the best air cooler ive bought by far. easily out performs my H80.

I have my NB at 3124, HT at around 2300. I don't see how the bus speed would increase the speed of the chip clock for clock, is there something I'm missing perhaps?

I was thinking of getting water cooling because I was going to get setup for Steamroller, and the speculation on the high TDP is they will run quite a bit hotter than Bulldozer does.

If I were to use FSB at a higher level, and less mutli, I would need to reduce the NB/HT/Ram speed to what it is now anyway, as these are the highest clocks ive been able to achieve with stability. Or is it because FSB vs Multi uses less voltage to achieve higher clocks?

If your only at 1.5v I would leave your overclock alone. You have everything else pushed beyond their normal limits, the temps are good and your stable. I'm using 1.475v at 4.125 but I only brought my NB to 2700 and left the HT Link at 2000. Many overclocking guides for the Thuban state raising the NB too high reduces performance. I couldn't get my chip over 4 just using the multiplier, it would take allot of voltage. Maybe the difference here is our motherboards but a part of me is wondering if you have a higher quality chip that would react similarly to the higher bus speed and allow you to get even further past 4155 using the same voltage.

AFAIK Steamroller has the same 125w TDP as Vishera. The 220w TDP are for the 4.7GHZ Vishera chips. There is really no way to know if Steamroller will produce more or less heat because so much is changing. There will be tweaks along with the die shrink to 28nm to reduce power consumption and heat. However, at the same time IPC is going to increase and the cores will not be bottle necked by the single decoder. Which means the cores are doing more work within the same amount of time thus generating more heat again. Will it just balance out in the end again? maybe who knows.
Quote:
Originally Posted by Kokin View Post

Have you ever tried to Crossfire with your current setup? Your statement is very valid for single-card/single-monitor gaming, but I'm talking about something entirely different.

I had problems with 2x 5870s when they were in Crossfire with my old AMD platform (955 @ 4.2ghz, NB @ 3ghz, RAM @ 1600 7-7-7-20 timings). When in single card mode, my 5870 would run 100% in games like BF3, but when in CF mode, they would run only at 50~70% and the gameplay was very choppy with high CPU utilization (80~99%). CF was technically maintaining 40~60FPS, but nothing I did could fix the choppiness. I was basically getting single card performance on my CF and single card mode would play more smoothly.

When I switched to an i5 2550K, the CF problem went away and both cards ended up running at 90~100% usage at all times. BF3 became as smooth as butter on CF and I was able to maintain a solid 50~60FPS.

If what I experienced was not a bottleneck, then I have no idea what to call it. 2x 5870s are only considered mid-ranged now, so I can only imagine how bad 2x 7970s would perform on a Thuban chip.

Before purchasing my 7950 I had 2 6850's in crossfire for a year and half.

Even with a single card, A Phenom II 955 is not strong enough to run BF3 and maintain 60fps. I had to overclock my Thuban to 3.9GHZ before I was able to maintain 60fps in BF3, and it was utilizing all 6 cores. The multiplayer is just very demanding, there is so much going on. That being said, My 2x 6850's performed flawlessly in BF3 once I overclocked Thuban. Also, for the CPU limited games I have I saw no increase in fps by switching from my 2X 6850's to 1 7950.

Theirs no doubt if you are planning a Crossfire/SLI build from the beginning, Intel would be a better choice for the CPU limited games ATM. However, for the OP I think it would be a waste of money. Besides, If the leaked die shots that appeared online are really Steamroller its going to be a beast. biggrin.gif
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