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Connecting an ati radeon hd 4870

Forum Graphic & Displays : ATI - Connecting an ati radeon hd 4870

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mr88   11-15-2009 at 05:12:57 AM

hi! my question is this!on the hd 4870 board there are 2 power connectors and 1 for fan power!do i have to power both connectors or just one,and is the second connector for bringing juice to an second card in crossfire mode?
the (online)manual of ati sucks
by the way! no technical explaination what so ever!
i,m not connecting the card befor any solid info,otherwise i,m afraid it goes talibang on my mummyboard!lol!
:pfff: :heink: :D

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Bronze Graphics badge EXT64   11-15-2009 at 05:21:20 AM
- 0 +

Yes, you have to connect both power connectors. Since the 4870 has to be backward compatible with PCI-E 1, only 75W can be guaranteed to come from the MB, 75W from 1 power connector (150W so far) and the remaining small bit needs the other power connector. And what do you mean one for fan power?


Message edited by EXT64 on 11-15-2009 at 05:21:49 AM
------------------------------ Phenom II X4 940 BE 3.0GHz - 1.25V > GA-MA790GP-DS4H > XFX ATI 4850 1GB > 4GB OCZ Platinum 1066MHz 5-5-5-15-2T > PCP&C 610W
Athlon II X2 250 3.0GHz > GA-MA770T-UD3P > Sapphire ATI 4650 512MB DDR3 > 4GB OCZ Platinum 1600MHz@1066MHz > XP/Win7 Enter 64
 Reply to EXT64
mr88   11-15-2009 at 05:41:04 AM
- 0 +

ok! i see!i have only 1 pci xpress power connector on my shuttle!can i split that with an splitter to feed the card?
my bad the connector for the fan, was hidden under the plastic cover!

Reply to mr88
Bronze Graphics badge EXT64   11-15-2009 at 05:43:26 AM
- 0 +

Normally you can get an adapter to go from 2 molex to 1 PCI-E power, but what is your power supply?

------------------------------ Phenom II X4 940 BE 3.0GHz - 1.25V > GA-MA790GP-DS4H > XFX ATI 4850 1GB > 4GB OCZ Platinum 1066MHz 5-5-5-15-2T > PCP&C 610W
Athlon II X2 250 3.0GHz > GA-MA770T-UD3P > Sapphire ATI 4650 512MB DDR3 > 4GB OCZ Platinum 1600MHz@1066MHz > XP/Win7 Enter 64
 Reply to EXT64
Bronze Graphics badge EXT64   11-15-2009 at 05:54:30 AM
- 0 +

This is what i am referring to:

http://www.newegg.com/Product/Prod [...] -_-Product

One may actually come with your card. But, check first to make sure your PSU can actually power that much card.

------------------------------ Phenom II X4 940 BE 3.0GHz - 1.25V > GA-MA790GP-DS4H > XFX ATI 4850 1GB > 4GB OCZ Platinum 1066MHz 5-5-5-15-2T > PCP&C 610W
Athlon II X2 250 3.0GHz > GA-MA770T-UD3P > Sapphire ATI 4650 512MB DDR3 > 4GB OCZ Platinum 1600MHz@1066MHz > XP/Win7 Enter 64
 Reply to EXT64
mr88   11-15-2009 at 06:09:17 AM
- 0 +

well in the manual is written that the 4870 needs 500w or even beter 600w and my shuttle only got 450w.so i'm afraid that i need to buy another power supply,but i wanna test it first if it works on 450w,
it runs on an duocore 2x3000mhz an has the maximum of 2gb of memory to drive on!also the shuttle doesnt need to mutlitask,and ife bought an dvd/rw with minimal power requirements to try to compensate power for the card

Reply to mr88
Bronze Graphics badge EXT64   11-15-2009 at 04:02:53 PM
- 0 +

What is the brand/12V amperage specs of the PSU? A good 450W could handle it, but a no name/low 12V amperage PSU will have problems at high load.

------------------------------ Phenom II X4 940 BE 3.0GHz - 1.25V > GA-MA790GP-DS4H > XFX ATI 4850 1GB > 4GB OCZ Platinum 1066MHz 5-5-5-15-2T > PCP&C 610W
Athlon II X2 250 3.0GHz > GA-MA770T-UD3P > Sapphire ATI 4650 512MB DDR3 > 4GB OCZ Platinum 1600MHz@1066MHz > XP/Win7 Enter 64
 Reply to EXT64
mr88   11-15-2009 at 11:45:08 PM
- 0 +

Shuttle 450W Computer Power Supply for Shuttle Prima Series upgrade, Active PFC, Serial ATA Ready, Model: PC55
This is a Shuttle 450W Computer Power Supply, for Shuttle Prima Series upgrade, Active PFC, Serial ATA Ready. Model: PC55.

Features: SFF compatible 450W Power Supply. Serial ATA ready. Active PFC. Smart Fan Temp-Speed control. OVP/OCP/SCP protection. Designed for the XPC.

Specifications: Model: PC55. Type: 450W SFF power supply. Input: Input Voltage: 90-264V AC. Input Current: 7A/3.5A (100/240V AC). Frequency: 47Hz / 63Hz. Effi ciency: >75% at full load. Output: Hold up time: >16ms at full load (@115V AC). Rise Time: <20ms at full load, nominal line. Short circuit protection: latch off. Power good signal: TTL compatible. Environmental: Operating Temp: 10oC ~ 50oC. Storage Temp: -40oC ~ 70oC. MTBF: >100,000 hours at 75% load, 25oC. Noise: <34dB. Saftey: UL, CUL, TUV, CB, BSMI. EMI: CE, FCC, BSMI. Dimensions: size: 150 x 86 x 83 mm (l x w x h). Cable length: Cable lengths designed for the XPC. XPC compatibility: P/ P2 Series.

Reply to mr88
mr88   11-15-2009 at 11:52:11 PM
- 0 +

also ife turned around the 2 back fans to create cool air flow into the shuttle and i have just enough room to fit an Zalman ZM-F2 Green LED fan (92mm with 2.800 rpm)
int the middle of the suttle!

Reply to mr88
jsc   11-16-2009 at 12:17:17 AM
- 0 +

The two back fans are designed to exhaust the air from inside the case. You shouldn't change them.

 

And the Shuttle PSU has enough power for the 4870.


Message edited by jsc on 11-16-2009 at 12:24:48 AM
Reply to jsc
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