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Crossfire 7850 or Buy 7950? - Page 2

post #11 of 19
Just crossfire the thing. More performance and less of a hassle trying to sell your current card and all.
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post #12 of 19
Quote:
Originally Posted by Allgeiert24 View Post

Sold my 7850 and bought the 7950 biggrin.gif I will give an update once I receive the card and start playing around with it.

which card did you get ? once you get your card test at stock speeds with power control maxed to +20% to avoid clock throttling. then start bumping up clocks in 25 mhz increments. if you hit 1125 - 1150 mhz game stable you have got a HD 7970 ghz biggrin.gif. good luck thumb.gif
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post #13 of 19
Thread Starter 
I went with the Sapphire you suggested, I get free 2 day shipping with newegg so hopefully I will have it friday. If it does get here friday it's going to be a sleepless weekend lol
post #14 of 19
Thread Starter 
Got my card today but it's the wrong one... They sent me this MSI instead! From what I've read this card is better than the Sapphire one I ordered so I will definitely be keeping it. I am not sure though if this is the boost or the regular one but it's stock core clock is 960mhz which doesn't match either so I'm going to assume it's the boost.

So far over clocking wise I've been running Unigine Valley and doing 25 incremental increases on core and then memory. I run Valley stable at stock voltage (1.125v), 1175mhz core, and 1500mhz memory. My best score was around 1968. However, if I bump the voltage up to 1.175v I can run 1200mhz core and 1500mhz memory and get a score of around 1979. Sadly though I tried running 3dMark (the new 2013 version) and it crashed on the first test mad.gif The 1175 over clock did run stable though.

I am uneasy about playing with the voltage to much because I don't want to kill my card. If you guys have any experience with this I would really appreciate any advice! With both those over clocks the card tends to float around 69 - 70 degrees celsius and the VRMs are around 75, but my A/C isn't working so the results are a little skewed since it's about 10 degrees fahrenheit higher than normal. Tomorrow when my A/C is fixed I am going to play around a little more and see if anything changes. I only tried one game to test the over clock and it was completely stable, not sure about the temps I forgot to look.

Even though I received the wrong card I am overly satisfied with my purchase. The performance increase is way more than I would have thought and after selling my 7850 I only spent around $125. This may be a stupid idea but I am seriously considering buying another for crossfire... I'm going to try and resist the urge until AMD gets these new drivers perfected but the thought of that much power has me drooling drool.gif
post #15 of 19
Nice! I used to have a TFIII 7950 and I loved it! Just setup a nice custom fan profile, keep an eye on temps and get that AC fixed when you can. I had mine up to 1.25v with no problems at all to be honest. Just keep an eye on those temps and see how it reacts. With 1.21 and really nice airflow in the case (but keeping everything reasonably quiet) I was doing 1250/1375 24-7 no problem. Even higher for just benchmarks.

Play around with it and see what you find.

Oh, worth mentioning, I did end up finding better overclocks using different OC Utilities. Sapphire Trixx gave me the highest stable OC even though I prefer MSI AB's layout. Also, I can't remember which specifically, but different drivers made a slight difference as well. Just something to think about.
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post #16 of 19
wow 1175 mhz at stock voltage of 1.125v is very good. thumb.gif did you test for sufficiently long duration, because as the ambient temps increase the core temps will rise and stability could also change. test 3dmark 2013,heaven 4.0, valley 1.0 for benchmakrs. for games test crysis 3, bf3, tombraider. if you can be game/benchmark stable for over 1 hr you can confirm that the OC is stable.

i would advise to stick with 1175 mhz at stock voltage. gaining another 50 - 75 mhz for a minor perf bump but at a significant increase in heat and temps is not worth it.
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post #17 of 19
I have the Sapphire HD 7950 Dual X at 1100/1400 and can max out Crysis 3 BUT at msaa x4 1080p(cpu is at 4.5ghz). The card is amazing. it never goes above 65 C on full load... and also having one card is better... Recommend dual x or vapor x. best IMO.
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post #18 of 19
Thread Starter 
Quick update: A/C is fixed but the house is still a little warmer than usual. Ran all the tests again and got some scores that were higher and some that were lower but nothing drastically different. Temps are down to about 65 for core and VRAM but I expect them to drop even more once the house is at normal temperature. I am also going to play around with the voltage and see where that takes me once the house is cold.

Scores:
3dMark11 - P10012
3dMark 2013 Firestorm - 7521
Unigine Valley - 1945
Unigine Heaven 4.0 - 971
post #19 of 19
Thread Starter 
Quote:
Originally Posted by raghu78 View Post

wow 1175 mhz at stock voltage of 1.125v is very good. thumb.gif did you test for sufficiently long duration, because as the ambient temps increase the core temps will rise and stability could also change. test 3dmark 2013,heaven 4.0, valley 1.0 for benchmakrs. for games test crysis 3, bf3, tombraider. if you can be game/benchmark stable for over 1 hr you can confirm that the OC is stable.

i would advise to stick with 1175 mhz at stock voltage. gaining another 50 - 75 mhz for a minor perf bump but at a significant increase in heat and temps is not worth it.

I ran all of those benches and gamed for about 2 hours when my house was hottest (about 80 Fahrenheit) so I think dropping the ambient temp will only help. This is most likely going to be my daily over clock but I am going to push it just for the sake of benchmarks. From my research I seem to be on par with a mildly over clocked 7970ghz which makes me feel really confident in my purchase.
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