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Intel i5 3570K bottlenecking 7970 in crossfire? - Page 2

post #11 of 61
Quote:
Originally Posted by ChronoBodi View Post

HT isn't as useless as it used to be for games... Crysis 3 itself shows quite a boost from HT to the point where it's noticeably over non-HT cpus.

That's the exact point he is making.
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post #12 of 61
Thread Starter 
Well, after even more testing it seems my cpu is holding me back (4Ghz), depending on map and players I get different fps, and also depending on where on the map I am. In base I have much higher fps, but it gets lower around flags etc. I have 120hz screen so im very fps sensitive.

I ran 4.8Ghz with 1.32 Vcore I believe with my old waterloop, game stable and 6 hours benchmark stable before I aborted the test. I tried to underclock my cpu, to around 3Ghz and it it was like 15-20 fps differance between 3ghz and 4ghz. As it is now, it really seems like my i5 is too weak at current clocks to fully take advantage of two 7979 in cf.

I dont know what else to do, before I try my original OC setup. I have tried each card individualy, and it runs butter smooth with more stable fps regardles of map and players. Its just in CF I get huge fps drops, and lower average than with one card. If I knew I would CF I would probably have bought a I7 3770k or a LGA2011 system.

Other people say they get like 120 fps average in bf3 multiplayer on all ultra with i5 3570k and 7970 in cf, so im really confused. I will try to upload some screens from MSI afterburner so you all can see fps and gpu usage from a session of bf3 multiplayer. You will see that the gpu usage is related to the fps. The lower gpu usage, the lower fps (if i remember correctly).
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post #13 of 61
if you can get that 4.8 stable back your issues will disappear. with only one 7950 stock and my chip at 4.5GHz (i7SB), i can maintain 60 minimum at caspian 64 using ultra and 4msaa. when the chip is at stock, it goes down to the low 50s.

ht off (basically an i5) my minimum is about 10fps lower compared to ht on. your i5 ivy at 4GHz is equal to an i5 sb at 4.4ghz. the gpus are just so fast for it.
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post #14 of 61
Thread Starter 
Here is a upload from MIS afterburner, where you can see the fps and gpu usage. Fps was like 80 average I believe, but with huge drops down to low 60s, highest was like 120 fps. This isnt on all ultra but custom, with mesh quality ultra and 16x, 4xmsaa. Rest of the settings on high and medium.

It was multiplayer, bandar desert around 55 players.

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post #15 of 61
You are not bottlenecking. GPU usage is proper.
 
Gsvlip Dudyrm
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post #16 of 61
Thread Starter 
Have you even read the whole thread? I get the same or even lower fps with two cards, with exeption from beeing in base or lower populated areas.
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post #17 of 61
Need more clockspeed and someone please show me a benchmark where HT is beneficial in BF3
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post #18 of 61
4ghz is so low unless you're using the stock cooler OP.

use this
www.overclock.net/t/1247413/ivy-bridge-overclocking-guide-with-ln2-guide-at-the-end/0_100
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post #19 of 61
GPU-usage isnt proper...Something is seriously wrong, could 4GHz 3570k REALLY bottleneck 2x7970s that badly? I know that I get 80-90fps average with max settings @1080p 72Hz in every 64p full map except Gulf of Oman with 2500k@4,5GHz+a SINGLE HD7950@1150/1500MHz , and he also said he gets the same fps with a single card (99% usage I assume).

You would know if you overclocked your cpu to 4,5GHz smile.gif

@Stay Puft, rdr09 has posted his benchies several times with a SINGLE HD7950, and I believe him because I´ve seen other 2600/2700k users post their benchies with HT on vs HT off, HT certainly helps even with a single-card solutions, more so with as much GPU horsepower as HD7970 crossfire.
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post #20 of 61
Quote:
Originally Posted by youpekkad View Post

GPU-usage isnt proper...Something is seriously wrong, could 4GHz 3570k REALLY bottleneck 2x7970s that badly? I know that I get 80-90fps average with max settings @1080p 72Hz in every 64p full map except Gulf of Oman with 2500k@4,5GHz+a SINGLE HD7950@1150/1500MHz , and he also said he gets the same fps with a single card (99% usage I assume).

You would know if you overclocked your cpu to 4,5GHz smile.gif

@Stay Puft, rdr09 has posted his benchies several times with a SINGLE HD7950, and I believe him because I´ve seen other 2600/2700k users post their benchies with HT on vs HT off, HT certainly helps even with a single-card solutions, more so with as much GPU horsepower as HD7970 crossfire.

500mhz/4000 = 12.5% increase in clockspeed can provide MAXIMALLY 12.5% increase in frames right? Of course it won't scale that high. So him clocking higher won't be the end all but it'll help nevertheless, it's half a GHz! thumb.gif OCN here
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