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Old 15th December 2013, 6:49 PM   #1
Razorz Thread Starter
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Default 7990 overclocking

Hey guys, been mucking around with my 7990 now that the new thermal pads dropped the vrm temps by something stupid :P

I have been able to overclock core to 1100 mhz and memory to 1575 via the AMD overdrive controller... Did a few benches, bf runs but mostly heaven 4.0..

And I see no difference... in temps in anything... frames are the same and the minimum fps was decreased in heaven benches after overclocking lawl... Even if I drop the core to 950 and drop the memory even lower... same frames, same temps...

what is even happening, msi afterburner reports the 7990 as running at those increased speeds but I see no gain

Any advice?...
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i7 3770k (4.7ghz) /// Asrock z77 OC Formula /// Gigabyte 7990 + HIS 7970 (swiftech komodo blocks) ///
Seasonic 1000w Platinum /// Corsair Vengeance Pro 8 gb 1866 Mhz /// Yamakasi Catleap Q270
Samsung 256 gb 840 PRO /// Samsung 500 gb EVO /// ASUS essence STX /// DT250

Build 1 - Latest build
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Old 16th December 2013, 8:55 AM   #2
VL_BT1
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Throttling?

What are your benchmark results?
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Old 16th December 2013, 9:43 AM   #3
Razorz Thread Starter
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Unigine Heaven Benchmark 4.0
3770k at 4.7 GHZ

Settings: Direct 3D11
Mode: 2560x1440 (2xAA fullscreen)
Quality: Ultra
Tessellation: Extreme


@ 1000, 1500 Mhz

FPS: 49.6
Score: 1248
Min FPS: 21.1
Max FPS: 103.3


@ 1100, 1575

FPS: 49.5
Score: 1246
Min FPS: 12.3
Max FPS: 104.5


I think I'll run it a few more times.. but the results are usually quite consistent. My temperatures are under 40 degrees.. with vregs at about 50.
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i7 3770k (4.7ghz) /// Asrock z77 OC Formula /// Gigabyte 7990 + HIS 7970 (swiftech komodo blocks) ///
Seasonic 1000w Platinum /// Corsair Vengeance Pro 8 gb 1866 Mhz /// Yamakasi Catleap Q270
Samsung 256 gb 840 PRO /// Samsung 500 gb EVO /// ASUS essence STX /// DT250

Build 1 - Latest build
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Old 17th December 2013, 8:52 AM   #4
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I ran it again and increased the power setting to +20% and got this

@1100, 1575

FPS: 50.2
Score: 1264
Min FPS: 23.7
Max FPS: 105.4
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i7 3770k (4.7ghz) /// Asrock z77 OC Formula /// Gigabyte 7990 + HIS 7970 (swiftech komodo blocks) ///
Seasonic 1000w Platinum /// Corsair Vengeance Pro 8 gb 1866 Mhz /// Yamakasi Catleap Q270
Samsung 256 gb 840 PRO /// Samsung 500 gb EVO /// ASUS essence STX /// DT250

Build 1 - Latest build
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