I ordered from digi-key. I picked up:
Trimmers:
http://search.digikey.com/scripts/Dk...me=490-2905-ND
Iron:
http://search.digikey.com/scripts/Dk...ame=WPS18MP-ND
--Matt
My Rig :
Core i5 4570S - ASUS Z87I-DELUXE - 16GB Mushkin Blackline DDR3-2400 - 256GB Plextor M5 Pro Xtreme
just finished my Vmod according to your guide Riska, thanks much for the great pics of the solder points
used 2 50ohm 25turn pots
(click twice for full res )
quick question about it, what should the resistor read on the DMM when the mod is installed? I set mine to 35 ohms befor installation and now the legs of the VR read 3.5 ohms... the full resistance leg only reads 20ohms. its very very odd maybe I just have a ty DMM....
Last edited by SNiiPE_DoGG; 12-22-2008 at 04:28 PM.
My Rig :
Core i5 4570S - ASUS Z87I-DELUXE - 16GB Mushkin Blackline DDR3-2400 - 256GB Plextor M5 Pro Xtreme
You have to set the trimmers to max ohm before powering up the card becaus you dont now how much voltage you will put in the card and maybe you will fry your card!
you can forget about 950 at least many people dont even get that kind og speed under Ln2 i have a lucky card and i have testet many cards and only mine clocks that high on water so set your mind on 875+ mhz the you wont be dissapointed my freind
The man with the littel Barebone!
And proud Crew of!!!
Octeamdenmark.com
Shuttle SX38P2Pro Barebone E8600cpu and HD4870X2 gfx and 2gig Crusial Ballistix PC8500 Cl5 and 2x150gig Raptor in raid 0 and 1x750 gig seagate
Msi 790FX-GD70 Mobo Amd 955-965 PHII cpus and 2gig Crucial value PC10600@800mhz 7-5-5-15 1T
And 4x500GB Seagate 7200.12 in raid0
4xHD5770 in CFQ.
[SIGPIC][/SIGPIC]
riska just to ask what is the default vmem for the card? thanks
Buildin
It dosent matter what brand they are the same
The default vmem is about 1.6v but it is hard to say as the vmem is raising and falling automatic on theese cards
The man with the littel Barebone!
And proud Crew of!!!
Octeamdenmark.com
Shuttle SX38P2Pro Barebone E8600cpu and HD4870X2 gfx and 2gig Crusial Ballistix PC8500 Cl5 and 2x150gig Raptor in raid 0 and 1x750 gig seagate
Msi 790FX-GD70 Mobo Amd 955-965 PHII cpus and 2gig Crucial value PC10600@800mhz 7-5-5-15 1T
And 4x500GB Seagate 7200.12 in raid0
4xHD5770 in CFQ.
[SIGPIC][/SIGPIC]
My Rig :
Core i5 4570S - ASUS Z87I-DELUXE - 16GB Mushkin Blackline DDR3-2400 - 256GB Plextor M5 Pro Xtreme
Well, it turns out my loop isn't up to running an e8600@4.55/1.42v and a 4870X2@890/1.41v. I got the mod installed, and the voltage dialed in to ~1.41v on both GPUs. Unfortunately, my CPU temps were skyrocketing and causing my system to BSOD. I couldn't make it through a pass of Vantage with my CPU kept at 4.55. I struggled with attempting to get both GPUs stable at 890mhz with the CPU under linpak, but was only able to get the CPU and GPUs stable under separate load tests. I eventually found a compromise with the CPU at 4.4@1.42v, but would rather have the extra 150mhz on the CPU than the extra GPU clocks. Temps were still over 85C under OCCTPT after 15 minutes at that point. I pulled the mod and put my system back together. It's running just like it was beforehand.
I might throw another rad in my loop and put it back some day, but I'm over extended on cooling capacity for the moment. How disappointing :-/ Hopefully others will have better results! This mod is probably a good one to shoot for if you're running separate loops for GPU and CPU cooling, or if you're loop isn't radiator constricted!
Thanks for the thread Riska. While my luck was not so good overall, the mod worked exactly as you stated!
--Matt
Last edited by mattkosem; 01-03-2009 at 11:53 AM.
My Rig :
Core i5 4570S - ASUS Z87I-DELUXE - 16GB Mushkin Blackline DDR3-2400 - 256GB Plextor M5 Pro Xtreme
What kind of VRM temps are you guys getting, I think I need to cool VRM 1 more as its about 10-20C different than VRM2! These are both located relative to where the stock fan was correct? My stock heatsink on this part is cut to just cover this side, but now with both cores loaded at 1.4v all the temps are find except the vrm1, vrm 2 loads about 80 and vrm 1 gets about 105!!!! I know that VRM's can take heat, but this seems like too much! Have you guys found a better way to cool these. All the other chips on my card have heatsinks attached, this is the only part that uses the stock heatsink, because I couldn't find a heatsink to efficiently cover all of the chips. Also have you guys had better luck leaving the fan on, or taking it off to lower vrm temps..... Thanks
Truly a good example of how to write a good guide. Nice job.
ASRock 990FX Extreme4
AMD FX 8350
Kingston 16GB (4GBx4) DDR3 1333
Gigabyte NVidia GTX 680 2GB
Silverstone 1000W PSU
Nice guide. I take it there is only the hardmod option available if I want to increase my HD4870X2's clock speeds? No raising the VGPU to 1,5V via software like back in the X1900 days?
Trying to judge if it's worth the hassle.. I got my card watercooled and cold all right (usually below 30C core, card loop only), and it can do a 3D06 pass at around 850 Core. DOesn't like memory clocking at all though, even 950 will give artefacts. What'd you recon I could reach with a VGPU mod, 930-950? I mean it already does 850... oh yeah, waht's the stock VGPU on those cards anyway? I haven't modded a GFX card since my 8800 GTS 640 lol.
Whats the OVP of this card? I haven't gone past 1.4, but I'm wondering if 1.45 or 1.5 would be ok? Has anyone tried this?
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