3dfx Archive - Voodoo5 5500 mod from 3.3v only to 1.5v only AGP4x

Komponent Senior Member Offline 3dfx modder Posts: 282	Re: Voodoo5 5500 mod from 3.3v only to 1.5v only AGP4x Reply #30 - 06.11.13 at 20:07:38 Might have absolutely no relevance; my card has BIOS 1.18 on. I doubt that makes a difference (but no hurt in trying this lead too). Wish I had access to a confirmed REV A2 compatible motherboard and test it...
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Loeschzwerg Senior Member Offline AAlchemy PSU maker :-) Posts: 396 Germany -> Bavaria -> Augsburg Gender:	Re: Voodoo5 5500 mod from 3.3v only to 1.5v only AGP4x Reply #31 - 06.11.13 at 21:28:31 Tried 1.12 and 1.18, makes no difference.
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Komponent Senior Member Offline 3dfx modder Posts: 282	Re: Voodoo5 5500 mod from 3.3v only to 1.5v only AGP4x Reply #32 - 11.12.13 at 18:46:15 Tried to save money to buy one KT400 motherboard to continue the project, but couldn't make it. Maybe next month... Damn, I wish I would have a job with a salary above 200 Euro a month!!! Until then the status is work in progress.
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osckhar God Member Offline www.3Dfx.es Posts: 812 SPAIN Gender:	Re: Voodoo5 5500 mod from 3.3v only to 1.5v only AGP4x Reply #33 - 12.12.13 at 09:48:00 komponent, I tried the mod and card was very unstable. I used different motherboards with same problems. It only works ok in single mode. - Oscar.
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Komponent

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Re: Voodoo5 5500 mod from 3.3v only to 1.5v only AGP4x
Reply #34 - 30.12.13 at 15:47:15

Update:
I got myself a 1.5v AGP only for cheap, under 10 Euro. It's a ECS KM400-M2 REV1.0, so KM400 chipset. I tested my modded Voodoo5 and came to this conclusion: one or the other - there is something special about REV 2500 Voodoo5 cards, or there is something special about my card alone, as is works rock stable with 1.5v signaling (I measured VDDQ to 1.49v). Did anybody else modded a REV2500 Voodoo5? This needs more investigation...

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Komponent Senior Member Offline 3dfx modder Posts: 282	Re: Voodoo5 5500 mod from 3.3v only to 1.5v only AGP4x Reply #35 - 02.01.14 at 10:57:31 As I will not need any more to use the card with 1.5v on Universal AGP 2.0 slots, I removed the A2-GND wire. I added a 3 pin jumper to select signaling mode, 3.3v or 1.5v. Video of 3DMark run on KM400-M2 motherboard: http://www.youtube.com/watch?v=cbABAKMpeiY
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m14radu God Member Offline Take your chance ! Posts: 555 Timisoara, Romania Gender:	Re: Voodoo5 5500 mod from 3.3v only to 1.5v only AGP4x Reply #36 - 03.01.14 at 10:31:28 Looks Great Komponent !
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Komponent

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Re: Voodoo5 5500 mod from 3.3v only to 1.5v only AGP4x
Reply #37 - 05.01.14 at 14:20:08

Update:
Found a Voodoo5 AGP REV 2500 in my own town to borrow and have it modded to 1.5v (AGP 4x).
Great news: tested it on KM400-M2 motherboard and it is totally stable!!! Stressed it with 4x AA, still it works with no issue. Cheesy

As I doubt the probability that I am so lucky to get 2 working 1.5v REV 2500 cards and the other of this kind not following suit, I guess I can state that my mod is a success at least for REV 2500 Voodoo5 5500 AGP cards. Shocked

Remember, it will only be compatible with motherboards that can throttle back AGP mode to AGP 1x.
Will see if I can borrow a different REV V5 and see how it behaves when modded. Good news is that I have a compatible motherboard. Tongue

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MadYoshi YaBB Newbies Offline I love YaBB 1G - SP1! Posts: 4	Re: Voodoo5 5500 mod from 3.3v only to 1.5v only AGP4x Reply #38 - 05.01.14 at 19:03:22 Thats are great news Are there differences in the game performance between the 2x and 4x AGP settings?
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Re: Voodoo5 5500 mod from 3.3v only to 1.5v only AGP4x
Reply #39 - 06.01.14 at 16:15:10

MadYoshi wrote on 05.01.14 at 19:03:22:

Thats are great news Cheesy

Are there differences in the game performance between the 2x and 4x AGP settings?

I doub't since motherboards have to "throttle back AGP mode to AGP 1x".
But it is a great news on a compatibility point of view : with this mod, you can use your V5500AGP on the least AGP motherboard if the allow 1x mod (Core 2 Duo, Athlon XP "Barton" or 64)...

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« Last Edit: 06.01.14 at 16:20:29 by Narmounet »

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anthony YaBB Newbies Offline recent 3dfx enthusiast Posts: 36	Re: Voodoo5 5500 mod from 3.3v only to 1.5v only AGP4x Reply #40 - 07.06.15 at 10:16:06 just for information v5 agp has agp_vref_1_5v and agp_vref_3v pins connected together and to vddq. v4 4500 agp has agp_vref_3v connected to vqqd and agp_vref_1_5v connected to Vregcg, it's different voltages
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osckhar

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Re: Voodoo5 5500 mod from 3.3v only to 1.5v only AGP4x
Reply #41 - 30.11.16 at 13:17:08

@komponent,

I received different V5 AGP for mod and I take an eye V5 AGP4x MOD. I used a riser and AGP_PINA2 is connected to GND in the riser.

I use an ABIT NF7-S plus an AGP riser and tested:

V5 AGP1x REV 1900 - PERFECT 4xFSAA
V5 AGP1x REV 2100 - PERFECT 4xFSAA
V5 AGP1x REV 2300 - NOT TEST YET
V5 AGP1x REV 2500 - PERFECT 4x FSAA

3DMark2001SE 4xFSAA in looping mode and worked four hours with not lock up.

Now need to test a V5AGP1x REV 2300.

Quote:

just for information

v5 agp has agp_vref_1_5v and agp_vref_3v pins connected together and to vddq. v4 4500 agp has agp_vref_3v connected to vqqd and agp_vref_1_5v connected to Vregcg, it's different voltages

In V5 5500 AGP4x REV.A2 agp_vref_3v connected to VDDQ and agp_vref_1_5v connected to Vregcg same as V4 4500 AGP4x.

NOTE- Everybody owns a V5 AGP4x REV.A2 - if you want to boots 1.5V AGP using a motherboard with AGP UNIVERSAL. You only needs to connect AGP_PINA2 to GND card will boots using 1.5V AGP4x voltage.

Regards,
Oscar.

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« Last Edit: 30.11.16 at 13:23:55 by osckhar »

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anthony

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Re: Voodoo5 5500 mod from 3.3v only to 1.5v only AGP4x
Reply #42 - 01.12.16 at 17:57:04

no need to connect a2 to gnd. all routing already exists. there is only one resistor needed to be soldered to make this card 1.5/3.3v compatible. don't remember exactly it's number but it easily can be tracked. afaik on back side, at the beginning of agp slot

same shit for powercolor v4s. only one resistor to make card 1.5/3.3 compatible

almost same shit for ordinary v5. these cards requires a bit of reworking, but they can be as compatible to 1.5v as stb v4 agp, no more, no less

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osckhar

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Re: Voodoo5 5500 mod from 3.3v only to 1.5v only AGP4x
Reply #43 - 01.12.16 at 20:07:11

Yes, routing is already done and connecting R548 with a 0 ohms resistor or simply connecting with tin both pads is enough for 1.5V AGP compatibility.

I did more test and REV 2300 is unstable following komponent`s step. Card lock up when FSAA is enabled.

@anthony- did you test it on 2300 revision? Do you use other way for enable AGPx4 in standar V5?

Regards,
Oscar.

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anthony YaBB Newbies Offline recent 3dfx enthusiast Posts: 36	Re: Voodoo5 5500 mod from 3.3v only to 1.5v only AGP4x Reply #44 - 02.12.16 at 21:10:14 komponent`s guide has major misconception concerning AND gate. it's bad idea to remove it cause it provides some sort of clock synchronization 2100 and 2300 run just fine on 4x mode in max perfomance mode will try 4x aa mode and give feedback
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