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7890 vs. 7870?

Last response: in Systems
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September 2, 2009 1:58:29 PM

Assumptions:
1. 4870 ~$145, 4890 ~4$190
2. Buying one card now but want ability to crossfire down the road
3. looks like 2 x 4870s require a 750W PSU and 2 x 4890 will require a 850W PSU

So...
A. Is that PSU requirements assessment correct?
B. How much better is the 4890 than the 4870
C. Given my build, will i tell the difference between 4870 and 4890
D. If that $ and PSU assessment is correct i will have to spend an extra ~$45 for the 4890 PLUS $ difference for larger PSU... is that correct?

Thanks, build info below from previous post.

APPROXIMATE PURCHASE DATE: Next week or two
BUDGET RANGE: $800-$1000

SYSTEM USAGE FROM MOST TO LEAST IMPORTANT: Primarily for gaming but do not want to spend the bank. Company of Heros, other RTS down the road, occasional shooter

PARTS NOT REQUIRED: All except monitor
PREFERRED WEBSITE(S) FOR PARTS: newegg.com

PARTS PREFERENCES: Thinking AMD x3 720 BE

OVERCLOCKING: Maybe SLI OR CROSSFIRE: Maybe

MONITOR RESOLUTION: 1080P 22”

ADDITIONAL COMMENTS: New to building computer. Would like some performance for gaming but not cutting edge. I may play with overclocking down the road but likely need to stick to moderate over clocking and a motherboard that helps noobs overclock.

AMD Phenom II X3 720 2.8GHz 3 x 512KB L2 Cache 6MB L3 Cache Socket AM3 95W Triple-Core Black Processor - Retail
http://www.newegg.com/Product/Prod [...] 6819103649 $119.00

Antec Three Hundred Illusion Black Steel ATX Mid Tower Computer Case - Retail
http://www.newegg.com/Product/Prod [...] 6811129066
Or Scout Case
http://www.newegg.com/Product/Product.aspx?Item=N82E168...

Microsoft Windows Vista Home Premium SP1 64-bit for System Builders w/ Tech Guarantee - OEM (Includes free Windows 7 updrade coupon)
http://www.newegg.com/Product/Prod [...] 6832116677

GIGABYTE GA-MA790GPT-UD3H AM3 AMD 790GX HDMI ATX AMD Motherboard - Retail
http://www.newegg.com/Product/Prod [...] 6813128398 $114.99

G.SKILL Ripjaws Series 4GB (2 x 2GB) 240-Pin DDR3 SDRAM DDR3 1600 (PC3 12800) Desktop Memory Model F3-12800CL7D-4GBRH - Retail
http://www.newegg.com/Product/Prod [...] 6820231279 $94.99

SAMSUNG Spinpoint F3 HD502HJ 500GB 7200 RPM 16MB Cache SATA 3.0Gb/s 3.5" Internal Hard Drive - OEM
http://www.newegg.com/Product/Prod [...] 6822152181 $54.99

SAMSUNG DVD Burner Black SATA Model SH-S223L LightScribe Support - OEM
http://www.newegg.com/Product/Prod [...] 6827151188 $31.99

Antec TruePower New TP-750 750W Continuous Power ATX12V V2.3 / EPS12V V2.91 SLI Certified CrossFire Ready 80 PLUS BRONZE Certified Active PFC "compatible with Core i7" Power Supply - Retail

More about : 7890 7870

September 2, 2009 2:15:12 PM

Nice build,

For case: I'd pick the Cooler Master Scout over the Illusion

Also as for HDD: you can get windows vista 64-bit + Western Digital Black 640gb in a combo.

RAM: Brand New so you would have to tell us how they are.


Also, PSU: the 750tx made by Corsair can run 2 4870's or 2 4890's.
September 2, 2009 2:51:51 PM

Your links are all broken. It looks like you just copied the text from your previous post.

As far as 4870 vx 4890, you'll have to check the benchmarks for the games you play. Of course the 4890 is the better GPU, but the 4870 1GB will easily handle a 22" monitor.
September 3, 2009 2:27:46 PM

Quote:
Of course the 4890 is the better GPU, but the 4870 1GB will easily handle a 22" monitor.


TS stated a 1080p 22" so depending on games the HD 4870 will do well on a 1680 x 1050 22 incher but not so well on a 1080p one perhaps?
!