AMD Radeon HD 6870 Voltage Modifications – The Complete Collection

MVDD

The gDDR5 memory used on our test unit are Hynix H5GQ1H24AFR parts with T2C markings. These are rated for 5.0 Gbps at 1.5 V operation. AMD runs these parts at approximately 1.6 V. 
You can decide for yourself whether it is clever engineering, or a cost cutting measure. We’re going to raise MVDD anyway.
MVDD1 AMD Radeon HD 6870 Voltage Modifications   The Complete Collection
MVDD2 AMD Radeon HD 6870 Voltage Modifications   The Complete Collection
The default MVDD on our test unit is 1628 mV in 3D mode. You may use a 100k ohm potentiometer in the same position. Once again, remember to set the potentiometer to its full rated value prior to installation; reduce resistance for increased MVDD.
No over-current or over-voltage trip points were observed below 2000 mV MVDD.

MVDD Modification – With a Pencil
Owing to the relatively large value of the resistor used in the “loop,” it is possible to perform the MVDD Modification using a pencil.
The instructions have been detailed earlier in this article.
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MVDD

The gDDR5 memory used on our test unit are Hynix H5GQ1H24AFR parts with T2C markings. These are rated for 5.0 Gbps at 1.5 V operation. AMD runs these parts at approximately 1.6 V. 
You can decide for yourself whether it is clever engineering, or a cost cutting measure. We’re going to raise MVDD anyway.
MVDD1 AMD Radeon HD 6870 Voltage Modifications   The Complete Collection
MVDD2 AMD Radeon HD 6870 Voltage Modifications   The Complete Collection
The default MVDD on our test unit is 1628 mV in 3D mode. You may use a 100k ohm potentiometer in the same position. Once again, remember to set the potentiometer to its full rated value prior to installation; reduce resistance for increased MVDD.
No over-current or over-voltage trip points were observed below 2000 mV MVDD.

MVDD Modification – With a Pencil
Owing to the relatively large value of the resistor used in the “loop,” it is possible to perform the MVDD Modification using a pencil.
The instructions have been detailed earlier in this article.
Prev3 of 5Next
Use your ← → (arrow) keys to browse
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