Sapphire 5870 Vapor-X (non reference) Vmods

[SF3D]

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!

[stummerwinter]

Thanx for sharing!

[NeoForce]

Thx Petri!

Nice info

[Massman]

What controller is used for the Vgpu?

[SF3D]

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.

[Massman]

Shouldn't it be possible to acces VID settings through the I2c bus?

[SF3D]

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.

[stummerwinter]

Can you unlock the BIOS?

[ChentinoX]

Hello, I wonder if these vmod operate also on a problem that I cannot upload voltages by software.Mi sapphire pcb also is blue.