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so my hd 7950 memory is at 1375mhz, i think it has the hynix MFR's rated for 1250 @ 1.6v yet the conflicts with hynix specs as there is no 1250 memory at 1.6v stock so either sapphire added +0.1v as i havent touched mvddc or hynix is wrong anyway is there a proven way to test ecc memory for stability? ive done the following:

-put it right up to 1500mhz to match 7970 stock speeds, occt gave solid blocked lines on the screen+freeze pretty fast, 1450mhz seemed to be fine
-1450 in benchmarks gave a decent increase, tried 1375 which also still had most of the increase (90%+ of it), & many more speeds between 1250 <-> 1375 <-> 1450 had the same steady result, iirc ecc memory when its limit is reached performance will stop rising or even drop due to retrying from corrupt data, but a steady increase with my tested frequencies should indicate that its fine there?
-tried the memory speed tests with core at 1000 & default boost 925 both with stock non boost vddc as any increase isnt needed, the difference from sped up memory was steady in all tests
-stressed with furmark (visually) & occt, no errors

http://www.skhynix.com/products/graphics/view.jsp?info.ramKind=26&info.serialNo=H5GQ2H24MFR
there under 5gbps which is 1250mhz rated, it should be 1.5v but mines stock 1.6v, but if i had the 6gbps chips they wouldnt of crashed at 1500, im yet to take off the heatsink even to replace the tim since it cools so well.

this is what its at now, the core can go more but im fine with it there since this card is 6+6 pin pci-e power, the difference above 1375 is still there but minimal. click magnifying glass icon at the bottom right twice to get full size.

sapphire-hd7950_1000-1375_OC.png~original
Edited by GigaByte - 10/19/13 at 4:42pm
     
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CPUMotherboardGraphicsRAM
Core i7 6700k @ 4.5 GHz Asus Sabertooth Z170 S EVGA GTX 970 4GB @ 1380/1853 MHz G.SKILL Ripjaws V 16GB DDR4 2400 @ 2800 16-15-1... 
Hard DriveHard DriveHard DriveHard Drive
Crucial MX100 512GB Samsung 850 EVO 1TB Toshiba 2TB 7.2K RPM Silicon Power S60 120GB 
Optical DriveCoolingOSMonitor
LG HL-DT-ST DVDRAM GH24NS95 Noctua NH-D15S Windows 10 Pro x64 BenQ GL2460HM @ 66 Hz 
KeyboardPowerCaseMouse
Logitech G910 EVGA SuperNOVA 750W G2 Cooler Master HAF XB EVO Steelseries Rival 
Mouse PadAudioAudio
Some cheap generic crap Asus Xonar DGX Kingston HyperX Cloud Revolver 
CPUMotherboardGraphicsRAM
Core i7 4710MQ Eurocom X3 R2/Clevo P157SM-A GeForce GTX 965M 4GB @ 1178/1353 MHz 16GB DDR3L 1866 @ 2133 11-11-11-31-2T 
Hard DriveHard DriveCoolingOS
[SSD] Mushkin ECO2 240GB [HDD] HGST 1TB 7.2K RPM SATA III Stock Windows 10 Pro x64 
MonitorKeyboardPowerCase
15.6" 1080P LCD Stock Stock 180W Stock 
MouseAudio
Touchpad/Microsoft Optical Mouse Sound Blaster X-Fi MB3 
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