SF3D Posted March 6, 2010 Share Posted March 6, 2010 Sapphire have done their own PCB for non reference 5870 card which is called Vapor-X. This mod is for rev.2 cards with blue PCB. There is no possibility to adjust voltages with software, but I don't find this annoying as long as clocks are good. Here is VGPU, OCP and Vmem mod. (Vmem mod is not tested yet, but it should be correct 100%) Reading points can be found from same picture. *OCP mod: Tune recistance down to 5Kohm. (9.9Kohm originally) It should be ok up to 1.5V ** Effect: More current can be drawn to GPU *Vgpu mod: Slowly tune down recistance. On 2D 1.17V is 1.41V in 3D. Those are the settings I use with aircooling ** Effect: More MHz for GPU. Better cooling will give better results. *Memory Vmod: Tune recistance down slowly. Measure from the leg of coil. ** Effect: May help memory overclocking when using LN2 as a cooling method. May also help with cold tolerance. Here is memory controller mod. Reading point is on the back side of the card. (Leg of coil) *Memory controller mod: Tune recistance down slowly. Stock voltage is 1.25V in 3D load. Use the values you prefer. ** Effect: May help memory overclocking when MHz are high. May also be needed while using LN2 as a cooling method. Here is VPCI-E mod. This is unconfirmed yet, so do not try if you are not sure by yourself. *VPCI-E mod: Tune recistance down slowly and measure from SMD recistors on the back of the card. ** Effect: May help cold tolerance and overclockability while using extreme cooling methods. Here is one sample score with mods installed. 1100MHz is almost doable in normal room temp. Enjoy! Quote Link to comment Share on other sites More sharing options...
Crew stummerwinter Posted March 7, 2010 Crew Share Posted March 7, 2010 Thanx for sharing! Quote Link to comment Share on other sites More sharing options...
Crew NeoForce Posted March 7, 2010 Crew Share Posted March 7, 2010 Thx Petri! Nice info Quote Link to comment Share on other sites More sharing options...
Massman Posted March 7, 2010 Share Posted March 7, 2010 What controller is used for the Vgpu? Quote Link to comment Share on other sites More sharing options...
SF3D Posted March 7, 2010 Author Share Posted March 7, 2010 Controllers are: VGPU: UP6213 Vmem: UP6101 VIMC: UP6101 VPCI-E: UP7701 I tried to do VID mod for VGPU, but it is locked and cannot be bypassed. Quote Link to comment Share on other sites More sharing options...
Massman Posted March 7, 2010 Share Posted March 7, 2010 Shouldn't it be possible to acces VID settings through the I2c bus? Quote Link to comment Share on other sites More sharing options...
SF3D Posted March 7, 2010 Author Share Posted March 7, 2010 It should be, but the circuit is locked. VID values does not change even you change values by hardmod. Software cannot override hardware in any case. I think sapphire saved some money with locked vid values on all controllers or something. I don't mind, cause I like traditional mods. Quote Link to comment Share on other sites More sharing options...
Crew stummerwinter Posted March 7, 2010 Crew Share Posted March 7, 2010 Can you unlock the BIOS? Quote Link to comment Share on other sites More sharing options...
ChentinoX Posted January 3, 2011 Share Posted January 3, 2011 Hello, I wonder if these vmod operate also on a problem that I cannot upload voltages by software.Mi sapphire pcb also is blue. Quote Link to comment Share on other sites More sharing options...
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