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***official amd 83x0 overclocking thread***

Well it was get the 7990 at ridiculous low price now and reap the benefits of the next month/two or wait for the 290 with custom coolers and buy it in Jan/Feb still costing ~ £300.

I figured get a 7990 that is more powerful than a 290 for only 80 sheets more (which should last a while). I was cursing myself when you boyos got it the last time with PSU so thought I could push for it.

Never have spent more than £180 on a GPU before so broke the cherry in the 'enthusiast' bracket.
 
Question guys, does having faster RAM help overclock CPU, I'm having problems with my FX8320 and Crosshair V Formula-Z, I can get it IBT stable at 4.6ghz with 1.46v with load package temps low-mid 50's (H100i push/pull), now I can't get 4.7 IBT stable at any voltage, been up to 1.52 max with temps in mid 60's. My RAM is 1600mhz, could this be the reason I can't get more from my CPU, or is it just bad silicone luck?
 
If you've overclocking via the bus, yes, as that will push the RAM speed up. Try reducing the memory speed to 1333MHz if so. Most 8320s should manage over 4.6GHz on your board, but of course it isn't guaranteed.
 
Make sure it isn't undervolting your ram. The CHV likes to. I would give the ram 1.65v regardless of it being 1.5v or whatever. My Mushkin is 1.5v but I had to give it 1.65 to get it stable.
 
Mathematics said:
Question guys, does having faster RAM help overclock CPU, I'm having problems with my FX8320 and Crosshair V Formula-Z, I can get it IBT stable at 4.6ghz with 1.46v with load package temps low-mid 50's (H100i push/pull), now I can't get 4.7 IBT stable at any voltage, been up to 1.52 max with temps in mid 60's. My RAM is 1600mhz, could this be the reason I can't get more from my CPU, or is it just bad silicone luck?
Click to expand...

See below: up the RAM voltage as Andy suggests, drop the multi as nikki suggests. I would up the bus speed and test with memtest first to see if the RAM handles it. If that passes - start upping your multiplier to get around 4.6 again before fine tweaking for stability and speed.

ALXAndy said:
I would give the ram 1.65v regardless of it being 1.5v or whatever. My Mushkin is 1.5v but I had to give it 1.65 to get it stable.
Click to expand...
nikki5974 said:
lower the multi a couple of knocks and up the fsb until you get upto ram speed of 1600 ish and lower multi more if needed for 4.7Ghz
Click to expand...


BurntProc said:
That's a lot of volts for 4.6. What's your LLC set to?
Click to expand...


For 4.6 you only need around 1.45, and set extreme to allow for voltage drooping under load.
 
alex_123_fra said:
Cool, another one for the club. We now have a modded bios by LTMatt too.
Click to expand...

I am looking forward to our subset 'club' :D , never flashed a GPU bios before info would be appreciated.

Back to the 7990 specifically, are we doing anything to bench or test how the overall performance of the fx83 + 7990 is doing?

Reason is beside the AMD bashing and fanboyism, I want to see if the issues intel died-in-wool are merely myth or true. Is there unnaceptable minimum frame dips, has driver improvements and optimisations ironed this out so we can debunk it or prove otherwise..

Just thoughts in my head. It may help people who with the news that no new hardware for 2014 to invest in beside kaveri that the FX83 is a great option and is equally worthy when compared to an i5 (and in some tests the i7).

I watched that Tek syndicate on the tube again regarding streaming while gaming. It's this type of viewpoint that get's ignored - was a great find Andy!
 
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Cheers guys, will have another go later, gave up last night!

Funny thing is I can get 4.4ghz stable at 1.40v so thought that would give me ample Volts and temps to play with but proving difficult!

4.4

4.5

4.6 - got it stable at 1.45v so dialing it in now!
 
Keep the good job guys.

May I add that 1.45v is tad too much for 4.6? My good old* FX8350 used to achieve that at stock 1.38v. Have you tried to use the CCC Overdrive with the autotune to see how far you can push it without volt tweaking?

Because what I found with Catalyst 13.11 WHQL, was that it was clocking the FX all way to 5Ghz, and according to all monitoring software (eg CPU-Z), even at 5Ghz, was never above 1.4v.

Even if, when manually tried to achieve that, from bios or AMD Overdrive, had to crack it all way to 1.5-1.525. On the other hand, the CCC Overdrive, using the APM was able to pull stable below that mark. Running much cooler also.




*Why I said old ;)
CommandCentre_zps31f1ed75.png
 
Panos said:
Keep the good job guys.

May I add that 1.45v is tad too much for 4.6? My good old* FX8350 used to achieve that at stock 1.38v. Have you tried to use the CCC Overdrive with the autotune to see how far you can push it without volt tweaking?

Because what I found with Catalyst 13.11 WHQL, was that it was clocking the FX all way to 5Ghz, and according to all monitoring software (eg CPU-Z), even at 5Ghz, was never above 1.4v.

Even if, when manually tried to achieve that, from bios or AMD Overdrive, had to crack it all way to 1.5-1.525. On the other hand, the CCC Overdrive, using the APM was able to pull stable below that mark. Running much cooler also.




*Why I said old ;)
CommandCentre_zps31f1ed75.png
Click to expand...

I did use AMD Overdrive auto-tune, it auto-tuned up to 6.3ghz lol, but everytime I selected 4.7 or above (it started the auto-tune at 4.7) it would crash. Even from Stock speeds, AMD overdrive and Asus Suite couldn't get more than 4.5ghz stable on my chip.
 
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