X1950 Accelero e GPU VRM a fuoco

[kastaldi]

Allora, dopo le altissime temperature della mia Sapphire X1950 Pro AGP, ho deciso di montare l'AC Accelero S1 Rev 2. Montaggio tutto ok, rumore del case dimezzato e, secondo Everest, la temperatura della GPU in idle è passata da 46 a 35 mentre quella ambiente GPU da 40 a 36. Soddisfatto del mio acquisto, mi cade l'occhio su GPU VRM e mi segna 67 contro i 42 di prima con la ventolina stock. Ovviamente CCC mi da 35 ma chi si fida ?

Dopo un attimo di panico, ho ripassato i passaggi ma non mi sembra di aver dimenticato niente... Ho appiccicato tutti e 8 i dissi della ram, facendo attenzione che aderissero bene (comunque l'adesivo fa schifo) e non ne è caduto uno. L'unico chip che andava bene per il dissi del voltage regulator era su un lato della scheda e c'era scritto VTEC (scusate per la vaghezza ma in elettronica sono sempre stato una schiappa). Grazie per i suggerimenti.

Questa è praticamente la mia scheda "denudata"... il VTEC è in basso a destra.

[kastaldi]

Ho trovato questo in un forum... Che ne dite ?

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2a. Articles
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L1 ISSUES WITH THE X1950PRO & THIRD PARTY COOLING
New owners of X1950PROs who would want to use aftermarket cooling should read this

The reference PCB of the GPU is very bare with a low capacitor count, the reason is because the X1950PRO's reference PCB designers opted to use the VRM and PWM chips in place of a capacitor barrage. This in turn makes for a more simplified PCB in which not that many capacitors are needed; they replace the capacitors and MOFSETs. There is a double-edged sword to this, the fact that these chips generate such an immense amount of heat. People know what they are but on the reference cooler, they weren’t made obvious. They were also used previously on the X1900XTXs and XTs as well as X1800XTs, but they were made obvious by small red heatsink. Due to the design of the X1950PRO's reference heatsink shown below:

http://img5.pcpop.com/ProductImages/.../000254415.jpg

It is one piece and thus upon removal you also remove the cooling that the heatsink gives. Many people were unaware that the X1950PRO actually had them then problems arose when they decided to get aftermarket cooling (after all, the X1950PRO’s reference cooler isn’t sufficient), with the VRMs burning out because of the lack of cooling installed

Chips indicated here are in need of heatsinking, if your layout of your PCB is the same regardless of cooler, if it has the VTEC or Pulse chip, then you have a VRM model.

http://img.techpowerup.org/070226/dwwdwddwdw.jpg

However many AIB manufacturers identified this problem and addressed it by using capacitors in stead of using the VRM units, this would make the GPU a little more cumbersome however. Sapphire for the X1950GT, now has used the X1950GT for the X1950PRO as well.

Known manufacturers that use VRM unit X1950PROs:
-ATI
-Powercolor
-Sapphire
-HIS
-Diamond (AGP MODEL ONLY)

If your X1950PRO uses the reference cooler, It automatically is a VRM unit, thus buy yourself a pack of Aluminium/Copper heatsinks and install them, the spares, well put them on the MOFSETS.

Notes:
-Powercolor X1950PRO Extreme/Silent already has small black ceramic heatsinks, these are more than enough
-Powercolor has now adopted a new PCB, which does not use VRMs for the normal models which do not use Arctic cooling coolers.
-HIS Use VRMs but they have a large copper heatsink which is clipped on, same with the ICEQ III and standard model
-Sapphire’s stock cooler is not enough, aftermarket cooling is needed if you want to have the card last.
-Sapphire now has switched to the X1950GT’s PCB, VRM cooling is not needed, however left-over-stock X1950PROs will still use the stock coolerSapphire now uses the X1950GT Cooler, BUT the reference X1950PRO PCB, they use a large aluminium heatsink for the VRM cooling which is TWO PIECE. Give sapphire a clap guys
-Sapphire’s X1950PRO Ultimate has a large gold aluminium heat sink for the VRMs attached by epoxy
-ATI are still using the stock cooler, due to the fact that its full copper! Other manufacturers use an aluminium and copper mix, sapphire has recently even made a full aluminium.
-Unless you want to overclock or have a silent PC, the normal cooler should do you fine.
-Use these heatsinks, with the spares use them for something else

[hibone]

mi pare tutto corretto,

il chip dovrebbe essere quello con scritto pulse (non si legge molto)


ps.
forse ti conviene controllare il thread ufficiale della tua scheda nella sezione schede video-> discussioni generali.

[kastaldi]

Originariamente inviato da hibone

mi pare tutto corretto,

il chip dovrebbe essere quello con scritto pulse (non si legge molto)

ps.
forse ti conviene controllare il thread ufficiale della tua scheda nella sezione schede video-> discussioni generali.

grazie, adesso guardo. avevo comprato anche il Turbo Module così nel frattempo ho montato una ventola nella stessa posizione di quella stock e la temp della vrm è scesa a 55, ancora troppo però rispetto all'originale (43).

[kastaldi]

Ho scoperto l'inghippo leggendo qua. I voltage regulator sono scoperti, oggi vado in negozio a recuperare un paio di dissi più piccoli possibile anche se non nutro particolari speranze...